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import qemu-kvm-6.2.0-11.module+el8.6.0+15668+464a1f31.2

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CentOS Sources 2022-08-02 03:09:31 -04:00 committed by Stepan Oksanichenko
parent fdc6cbd41b
commit 907dabadf9
14 changed files with 2057 additions and 1 deletions
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107
SOURCES/kvm-RHEL-disable-seqpacket-for-vhost-vsock-device-in-rhe.patch Normal file
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@ -0,0 +1,107 @@
From fb23aa4bc1842bb78e270ee7c4fdd663e45e2317 Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Thu, 24 Mar 2022 16:04:57 +0100
Subject: [PATCH 01/11] RHEL: disable "seqpacket" for "vhost-vsock-device" in
rhel8.6.0
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Stefano Garzarella <sgarzare@redhat.com>
RH-MergeRequest: 146: RHEL: disable "seqpacket" for "vhost-vsock-device" in rhel8.6.0 [rhel-8.6.0.z]
RH-Commit: [1/1] 516ee668b84252528de6f4946298089b153846f1
RH-Bugzilla: 2071103
RH-Acked-by: Jason Wang <jasowang@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Eugenio Pérez <eperezma@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
vhost-vsock device in RHEL 8 kernels doesn't support seqpacket.
To avoid problems when migrating a VM from RHEL 9 host, we need to
disable it in rhel8-* machine types.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
hw/core/machine.c | 10 ++++++++++
hw/i386/pc_piix.c | 2 ++
hw/i386/pc_q35.c | 2 ++
hw/s390x/s390-virtio-ccw.c | 1 +
include/hw/boards.h | 3 +++
5 files changed, 18 insertions(+)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 024b025fc2..76fcabec7a 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -37,6 +37,16 @@
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-pci.h"
+GlobalProperty hw_compat_rhel_8_6[] = {
+ /* hw_compat_rhel_8_6 bz 2068202 */
+ /*
+ * vhost-vsock device in RHEL 8 kernels doesn't support seqpacket, so
+ * we need do disable it downstream on the latest hw_compat_rhel_8.
+ */
+ { "vhost-vsock-device", "seqpacket", "off" },
+};
+const size_t hw_compat_rhel_8_6_len = G_N_ELEMENTS(hw_compat_rhel_8_6);
+
/*
* Mostly the same as hw_compat_6_0 and hw_compat_6_1
*/
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index f03a8f0db8..ab6d03e07a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -998,6 +998,8 @@ static void pc_machine_rhel760_options(MachineClass *m)
pcmc->kvmclock_create_always = false;
/* From pc_i440fx_5_1_machine_options() */
pcmc->pci_root_uid = 1;
+ compat_props_add(m->compat_props, hw_compat_rhel_8_6,
+ hw_compat_rhel_8_6_len);
compat_props_add(m->compat_props, hw_compat_rhel_8_5,
hw_compat_rhel_8_5_len);
compat_props_add(m->compat_props, pc_rhel_8_5_compat,
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 5559261d9e..882fe7a68d 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -658,6 +658,8 @@ static void pc_q35_machine_rhel860_options(MachineClass *m)
m->desc = "RHEL-8.6.0 PC (Q35 + ICH9, 2009)";
pcmc->smbios_stream_product = "RHEL-AV";
pcmc->smbios_stream_version = "8.6.0";
+ compat_props_add(m->compat_props, hw_compat_rhel_8_6,
+ hw_compat_rhel_8_6_len);
}
DEFINE_PC_MACHINE(q35_rhel860, "pc-q35-rhel8.6.0", pc_q35_init_rhel860,
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 9795eb9406..bec270598b 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -1109,6 +1109,7 @@ static void ccw_machine_rhel860_instance_options(MachineState *machine)
static void ccw_machine_rhel860_class_options(MachineClass *mc)
{
+ compat_props_add(mc->compat_props, hw_compat_rhel_8_6, hw_compat_rhel_8_6_len);
}
DEFINE_CCW_MACHINE(rhel860, "rhel8.6.0", true);
diff --git a/include/hw/boards.h b/include/hw/boards.h
index 04e8759815..4ddb798144 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -443,6 +443,9 @@ extern const size_t hw_compat_2_2_len;
extern GlobalProperty hw_compat_2_1[];
extern const size_t hw_compat_2_1_len;
+extern GlobalProperty hw_compat_rhel_8_6[];
+extern const size_t hw_compat_rhel_8_6_len;
+
extern GlobalProperty hw_compat_rhel_8_5[];
extern const size_t hw_compat_rhel_8_5_len;
--
2.27.0

128
SOURCES/kvm-Revert-redhat-Add-some-devices-for-exporting-upstrea.patch Normal file
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@ -0,0 +1,128 @@
From 27fbe5c920c6680f9dbe994963183ee515f40c12 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Thu, 14 Apr 2022 16:45:30 -0400
Subject: [PATCH 1/2] Revert redhat: Add some devices for exporting upstream
machine types
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 177: Revert redhat: Add some devices for exporting upstream machine types
RH-Commit: [1/1] 9e5dd81cc2e2c8f1df76de9f75d815c91c250c69 (jmaloy/qemu-kvm)
RH-Bugzilla: 2077928
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2077928
Upstream: no
Manual revert of commit 70d3924521c9bfd912bcf1a1fc76f49eb377de46, since
the directory structure looks different from rhel-av-8.4.0.z where
this commit is taken from. Besides, x86_64-softmmu.mak looks totally
different and should not be affected by this reversal.
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
configs/devices/x86_64-softmmu/x86_64-rh-devices.mak | 1 -
.../devices/x86_64-softmmu/x86_64-upstream-devices.mak | 4 ----
hw/char/parallel.c | 9 ---------
hw/i386/pc_piix.c | 2 +-
hw/i386/pc_q35.c | 2 +-
hw/timer/hpet.c | 8 --------
6 files changed, 2 insertions(+), 24 deletions(-)
delete mode 100644 configs/devices/x86_64-softmmu/x86_64-upstream-devices.mak
diff --git a/configs/devices/x86_64-softmmu/x86_64-rh-devices.mak b/configs/devices/x86_64-softmmu/x86_64-rh-devices.mak
index fdbbdf9742..31ce08edab 100644
--- a/configs/devices/x86_64-softmmu/x86_64-rh-devices.mak
+++ b/configs/devices/x86_64-softmmu/x86_64-rh-devices.mak
@@ -1,5 +1,4 @@
include ../rh-virtio.mak
-include x86_64-upstream-devices.mak
CONFIG_AC97=y
CONFIG_ACPI=y
diff --git a/configs/devices/x86_64-softmmu/x86_64-upstream-devices.mak b/configs/devices/x86_64-softmmu/x86_64-upstream-devices.mak
deleted file mode 100644
index 2cd20f54d2..0000000000
--- a/configs/devices/x86_64-softmmu/x86_64-upstream-devices.mak
+++ /dev/null
@@ -1,4 +0,0 @@
-# We need "isa-parallel"
-CONFIG_PARALLEL=y
-# We need "hpet"
-CONFIG_HPET=y
diff --git a/hw/char/parallel.c b/hw/char/parallel.c
index e5f108211b..b45e67bfbb 100644
--- a/hw/char/parallel.c
+++ b/hw/char/parallel.c
@@ -29,7 +29,6 @@
#include "chardev/char-parallel.h"
#include "chardev/char-fe.h"
#include "hw/acpi/aml-build.h"
-#include "hw/boards.h"
#include "hw/irq.h"
#include "hw/isa/isa.h"
#include "hw/qdev-properties.h"
@@ -535,14 +534,6 @@ static void parallel_isa_realizefn(DeviceState *dev, Error **errp)
int base;
uint8_t dummy;
- /* Restricted for Red Hat Enterprise Linux */
- MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
- if (strstr(mc->name, "rhel")) {
- error_setg(errp, "Device %s is not supported with machine type %s",
- object_get_typename(OBJECT(dev)), mc->name);
- return;
- }
-
if (!qemu_chr_fe_backend_connected(&s->chr)) {
error_setg(errp, "Can't create parallel device, empty char device");
return;
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index ab6d03e07a..5f101c8748 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -966,7 +966,7 @@ static void pc_machine_rhel7_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
m->family = "pc_piix_Y";
- m->default_machine_opts = "firmware=bios-256k.bin,hpet=off";
+ m->default_machine_opts = "firmware=bios-256k.bin";
pcmc->default_nic_model = "e1000";
pcmc->pci_root_uid = 0;
m->default_display = "std";
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 882fe7a68d..73b0d0d317 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -633,7 +633,7 @@ static void pc_q35_machine_rhel_options(MachineClass *m)
pcmc->pci_root_uid = 0;
m->family = "pc_q35_Z";
m->units_per_default_bus = 1;
- m->default_machine_opts = "firmware=bios-256k.bin,hpet=off";
+ m->default_machine_opts = "firmware=bios-256k.bin";
m->default_display = "std";
m->no_floppy = 1;
m->no_parallel = 1;
diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c
index 202e032524..9520471be2 100644
--- a/hw/timer/hpet.c
+++ b/hw/timer/hpet.c
@@ -733,14 +733,6 @@ static void hpet_realize(DeviceState *dev, Error **errp)
int i;
HPETTimer *timer;
- /* Restricted for Red Hat Enterprise Linux */
- MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
- if (strstr(mc->name, "rhel")) {
- error_setg(errp, "Device %s is not supported with machine type %s",
- object_get_typename(OBJECT(dev)), mc->name);
- return;
- }
-
if (!s->intcap) {
warn_report("Hpet's intcap not initialized");
}
--
2.35.3

59
SOURCES/kvm-display-qxl-render-fix-race-condition-in-qxl_cursor-.patch Normal file
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@ -0,0 +1,59 @@
From 08103b26cb393920410e0a943d35e79bbd9f5ce0 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@rehat.com>
Date: Wed, 13 Apr 2022 20:54:45 -0400
Subject: [PATCH 05/11] display/qxl-render: fix race condition in qxl_cursor
(CVE-2021-4207)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 162: display/qxl-render: fix race condition in qxl_cursor (CVE-2021-4207)
RH-Commit: [1/1] 055c5a8345ad434a723b8106ba0a7b85fe117547 (jmaloy/qemu-kvm)
RH-Bugzilla: 2075683
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Mauro Matteo Cascella <None>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2075683
Upstream: Merged
CVE: CVE-2021-4207
commit 9569f5cb5b4bffa9d3ebc8ba7da1e03830a9a895
Author: Mauro Matteo Cascella <mcascell@redhat.com>
Date: Thu Apr 7 10:11:06 2022 +0200
display/qxl-render: fix race condition in qxl_cursor (CVE-2021-4207)
Avoid fetching 'width' and 'height' a second time to prevent possible
race condition. Refer to security advisory
https://starlabs.sg/advisories/22-4207/ for more information.
Fixes: CVE-2021-4207
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220407081106.343235-1-mcascell@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 9569f5cb5b4bffa9d3ebc8ba7da1e03830a9a895)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/display/qxl-render.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
index d28849b121..237ed293ba 100644
--- a/hw/display/qxl-render.c
+++ b/hw/display/qxl-render.c
@@ -266,7 +266,7 @@ static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor,
}
break;
case SPICE_CURSOR_TYPE_ALPHA:
- size = sizeof(uint32_t) * cursor->header.width * cursor->header.height;
+ size = sizeof(uint32_t) * c->width * c->height;
qxl_unpack_chunks(c->data, size, qxl, &cursor->chunk, group_id);
if (qxl->debug > 2) {
cursor_print_ascii_art(c, "qxl/alpha");
--
2.27.0

76
SOURCES/kvm-hw-intc-arm_gicv3-Check-for-MEMTX_OK-instead-of-MEMT.patch Normal file
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@ -0,0 +1,76 @@
From ef311c8ca284d11dc812a1004de52125fc9eb194 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Wed, 13 Apr 2022 14:51:06 -0400
Subject: [PATCH 02/11] hw/intc/arm_gicv3: Check for !MEMTX_OK instead of
MEMTX_ERROR
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 158: hw/intc/arm_gicv3: Check for !MEMTX_OK instead of MEMTX_ERROR
RH-Commit: [1/3] ebfd87ea3a2de51c6961569861d5f4fba25890cc (jmaloy/qemu-kvm)
RH-Bugzilla: 2075686
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2075686
Upstream: Merged
CVE: CVE-2021-3750
commit b9d383ab797f54ae5fa8746117770709921dc529
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: Wed Dec 15 19:24:19 2021 +0100
hw/intc/arm_gicv3: Check for !MEMTX_OK instead of MEMTX_ERROR
Quoting Peter Maydell:
"These MEMTX_* aren't from the memory transaction
API functions; they're just being used by gicd_readl() and
friends as a way to indicate a success/failure so that the
actual MemoryRegionOps read/write fns like gicv3_dist_read()
can log a guest error."
We are going to introduce more MemTxResult bits, so it is
safer to check for !MEMTX_OK rather than MEMTX_ERROR.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit b9d383ab797f54ae5fa8746117770709921dc529)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/intc/arm_gicv3_redist.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/intc/arm_gicv3_redist.c b/hw/intc/arm_gicv3_redist.c
index c8ff3eca08..99b11ca5ee 100644
--- a/hw/intc/arm_gicv3_redist.c
+++ b/hw/intc/arm_gicv3_redist.c
@@ -462,7 +462,7 @@ MemTxResult gicv3_redist_read(void *opaque, hwaddr offset, uint64_t *data,
break;
}
- if (r == MEMTX_ERROR) {
+ if (r != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid guest read at offset " TARGET_FMT_plx
" size %u\n", __func__, offset, size);
@@ -521,7 +521,7 @@ MemTxResult gicv3_redist_write(void *opaque, hwaddr offset, uint64_t data,
break;
}
- if (r == MEMTX_ERROR) {
+ if (r != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid guest write at offset " TARGET_FMT_plx
" size %u\n", __func__, offset, size);
--
2.27.0

52
SOURCES/kvm-iotests-108-Fix-when-missing-user_allow_other.patch Normal file
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@ -0,0 +1,52 @@
From f663b951b87735bee6b5a4d75b726f609e557f8c Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Thu, 21 Apr 2022 16:24:35 +0200
Subject: [PATCH 11/11] iotests/108: Fix when missing user_allow_other
RH-Author: Hanna Reitz <hreitz@redhat.com>
RH-MergeRequest: 173: qcow2: Improve refcount structure rebuilding
RH-Commit: [4/4] cea00f9cb38639d4c51fab13c20311d1737d5ca3
RH-Bugzilla: 2072242
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
FUSE exports' allow-other option defaults to "auto", which means that it
will try passing allow_other as a mount option, and fall back to not
using it when an error occurs. We make no effort to hide fusermount's
error message (because it would be difficult, and because users might
want to know about the fallback occurring), and so when allow_other does
not work (primarily when /etc/fuse.conf does not contain
user_allow_other), this error message will appear and break the
reference output.
We do not need allow_other here, though, so we can just pass
allow-other=off to fix that.
Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220421142435.569600-1-hreitz@redhat.com>
Tested-by: Markus Armbruster <armbru@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit 348a0740afc5b313599533eb69bbb2b95d2f1bba)
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
tests/qemu-iotests/108 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tests/qemu-iotests/108 b/tests/qemu-iotests/108
index 23abbeaff0..775ff08eca 100755
--- a/tests/qemu-iotests/108
+++ b/tests/qemu-iotests/108
@@ -326,7 +326,7 @@ else
$QSD \
--blockdev file,node-name=export-node,filename="$TEST_IMG" \
- --export fuse,id=fuse-export,node-name=export-node,mountpoint="$export_mp",writable=on,growable=off \
+ --export fuse,id=fuse-export,node-name=export-node,mountpoint="$export_mp",writable=on,growable=off,allow-other=off \
--pidfile "$TEST_DIR/qsd.pid" \
&
--
2.27.0

445
SOURCES/kvm-iotests-108-Test-new-refcount-rebuild-algorithm.patch Normal file
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@ -0,0 +1,445 @@
From a5cc7f98669fbde7290fc363cb61dc7bd41718f3 Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Tue, 5 Apr 2022 15:46:51 +0200
Subject: [PATCH 09/11] iotests/108: Test new refcount rebuild algorithm
RH-Author: Hanna Reitz <hreitz@redhat.com>
RH-MergeRequest: 173: qcow2: Improve refcount structure rebuilding
RH-Commit: [2/4] db808dcc1c5ee9fd901c0800b3fac1348fab246f
RH-Bugzilla: 2072242
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
One clear problem with how qcow2's refcount structure rebuild algorithm
used to be before "qcow2: Improve refcount structure rebuilding" was
that it is prone to failure for qcow2 images on block devices: There is
generally unused space after the actual image, and if that exceeds what
one refblock covers, the old algorithm would invariably write the
reftable past the block device's end, which cannot work. The new
algorithm does not have this problem.
Test it with three tests:
(1) Create an image with more empty space at the end than what one
refblock covers, see whether rebuilding the refcount structures
results in a change in the image file length. (It should not.)
(2) Leave precisely enough space somewhere at the beginning of the image
for the new reftable (and the refblock for that place), see whether
the new algorithm puts the reftable there. (It should.)
(3) Test the original problem: Create (something like) a block device
with a fixed size, then create a qcow2 image in there, write some
data, and then have qemu-img check rebuild the refcount structures.
Before HEAD^, the reftable would have been written past the image
file end, i.e. outside of what the block device provides, which
cannot work. HEAD^ should have fixed that.
("Something like a block device" means a loop device if we can use
one ("sudo -n losetup" works), or a FUSE block export with
growable=false otherwise.)
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220405134652.19278-3-hreitz@redhat.com>
(cherry picked from commit 9ffd6d646d1d5ee9087a8cbf0b7d2f96c5656162)
Conflicts:
- 108: The downstream qemu-storage-daemon does not support --daemonize,
so this switch has been replaced by a loop waiting for the PID file to
appear
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
tests/qemu-iotests/108 | 263 ++++++++++++++++++++++++++++++++++++-
tests/qemu-iotests/108.out | 81 ++++++++++++
2 files changed, 343 insertions(+), 1 deletion(-)
diff --git a/tests/qemu-iotests/108 b/tests/qemu-iotests/108
index 8eaef0b8bf..23abbeaff0 100755
--- a/tests/qemu-iotests/108
+++ b/tests/qemu-iotests/108
@@ -30,13 +30,20 @@ status=1 # failure is the default!
_cleanup()
{
- _cleanup_test_img
+ _cleanup_test_img
+ if [ -f "$TEST_DIR/qsd.pid" ]; then
+ qsd_pid=$(cat "$TEST_DIR/qsd.pid")
+ kill -KILL "$qsd_pid"
+ fusermount -u "$TEST_DIR/fuse-export" &>/dev/null
+ fi
+ rm -f "$TEST_DIR/fuse-export"
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
+. ./common.qemu
# This tests qcow2-specific low-level functionality
_supported_fmt qcow2
@@ -47,6 +54,22 @@ _supported_os Linux
# files
_unsupported_imgopts 'refcount_bits=\([^1]\|.\([^6]\|$\)\)' data_file
+# This test either needs sudo -n losetup or FUSE exports to work
+if sudo -n losetup &>/dev/null; then
+ loopdev=true
+else
+ loopdev=false
+
+ # QSD --export fuse will either yield "Parameter 'id' is missing"
+ # or "Invalid parameter 'fuse'", depending on whether there is
+ # FUSE support or not.
+ error=$($QSD --export fuse 2>&1)
+ if [[ $error = *"'fuse'"* ]]; then
+ _notrun 'Passwordless sudo for losetup or FUSE support required, but' \
+ 'neither is available'
+ fi
+fi
+
echo
echo '=== Repairing an image without any refcount table ==='
echo
@@ -138,6 +161,244 @@ _make_test_img 64M
poke_file "$TEST_IMG" $((0x10008)) "\xff\xff\xff\xff\xff\xff\x00\x00"
_check_test_img -r all
+echo
+echo '=== Check rebuilt reftable location ==='
+
+# In an earlier version of the refcount rebuild algorithm, the
+# reftable was generally placed at the image end (unless something was
+# allocated in the area covered by the refblock right before the image
+# file end, then we would try to place the reftable in that refblock).
+# This was later changed so the reftable would be placed in the
+# earliest possible location. Test this.
+
+echo
+echo '--- Does the image size increase? ---'
+echo
+
+# First test: Just create some image, write some data to it, and
+# resize it so there is free space at the end of the image (enough
+# that it spans at least one full refblock, which for cluster_size=512
+# images, spans 128k). With the old algorithm, the reftable would
+# have then been placed at the end of the image file, but with the new
+# one, it will be put in that free space.
+# We want to check whether the size of the image file increases due to
+# rebuilding the refcount structures (it should not).
+
+_make_test_img -o 'cluster_size=512' 1M
+# Write something
+$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
+
+# Add free space
+file_len=$(stat -c '%s' "$TEST_IMG")
+truncate -s $((file_len + 256 * 1024)) "$TEST_IMG"
+
+# Corrupt the image by saying the image header was not allocated
+rt_offset=$(peek_file_be "$TEST_IMG" 48 8)
+rb_offset=$(peek_file_be "$TEST_IMG" $rt_offset 8)
+poke_file "$TEST_IMG" $rb_offset "\x00\x00"
+
+# Check whether rebuilding the refcount structures increases the image
+# file size
+file_len=$(stat -c '%s' "$TEST_IMG")
+echo
+# The only leaks there can be are the old refcount structures that are
+# leaked during rebuilding, no need to clutter the output with them
+_check_test_img -r all | grep -v '^Repairing cluster.*refcount=1 reference=0'
+echo
+post_repair_file_len=$(stat -c '%s' "$TEST_IMG")
+
+if [[ $file_len -eq $post_repair_file_len ]]; then
+ echo 'OK: Image size did not change'
+else
+ echo 'ERROR: Image size differs' \
+ "($file_len before, $post_repair_file_len after)"
+fi
+
+echo
+echo '--- Will the reftable occupy a hole specifically left for it? ---'
+echo
+
+# Note: With cluster_size=512, every refblock covers 128k.
+# The reftable covers 8M per reftable cluster.
+
+# Create an image that requires two reftable clusters (just because
+# this is more interesting than a single-clustered reftable).
+_make_test_img -o 'cluster_size=512' 9M
+$QEMU_IO -c 'write 0 8M' "$TEST_IMG" | _filter_qemu_io
+
+# Writing 8M will have resized the reftable. Unfortunately, doing so
+# will leave holes in the file, so we need to fill them up so we can
+# be sure the whole file is allocated. Do that by writing
+# consecutively smaller chunks starting from 8 MB, until the file
+# length increases even with a chunk size of 512. Then we must have
+# filled all holes.
+ofs=$((8 * 1024 * 1024))
+block_len=$((16 * 1024))
+while [[ $block_len -ge 512 ]]; do
+ file_len=$(stat -c '%s' "$TEST_IMG")
+ while [[ $(stat -c '%s' "$TEST_IMG") -eq $file_len ]]; do
+ # Do not include this in the reference output, it does not
+ # really matter which qemu-io calls we do here exactly
+ $QEMU_IO -c "write $ofs $block_len" "$TEST_IMG" >/dev/null
+ ofs=$((ofs + block_len))
+ done
+ block_len=$((block_len / 2))
+done
+
+# Fill up to 9M (do not include this in the reference output either,
+# $ofs is random for all we know)
+$QEMU_IO -c "write $ofs $((9 * 1024 * 1024 - ofs))" "$TEST_IMG" >/dev/null
+
+# Make space as follows:
+# - For the first refblock: Right at the beginning of the image (this
+# refblock is placed in the first place possible),
+# - For the reftable somewhere soon afterwards, still near the
+# beginning of the image (i.e. covered by the first refblock); the
+# reftable too is placed in the first place possible, but only after
+# all refblocks have been placed)
+# No space is needed for the other refblocks, because no refblock is
+# put before the space it covers. In this test case, we do not mind
+# if they are placed at the image file's end.
+
+# Before we make that space, we have to find out the host offset of
+# the area that belonged to the two data clusters at guest offset 4k,
+# because we expect the reftable to be placed there, and we will have
+# to verify that it is.
+
+l1_offset=$(peek_file_be "$TEST_IMG" 40 8)
+l2_offset=$(peek_file_be "$TEST_IMG" $l1_offset 8)
+l2_offset=$((l2_offset & 0x00fffffffffffe00))
+data_4k_offset=$(peek_file_be "$TEST_IMG" \
+ $((l2_offset + 4096 / 512 * 8)) 8)
+data_4k_offset=$((data_4k_offset & 0x00fffffffffffe00))
+
+$QEMU_IO -c "discard 0 512" -c "discard 4k 1k" "$TEST_IMG" | _filter_qemu_io
+
+# Corrupt the image by saying the image header was not allocated
+rt_offset=$(peek_file_be "$TEST_IMG" 48 8)
+rb_offset=$(peek_file_be "$TEST_IMG" $rt_offset 8)
+poke_file "$TEST_IMG" $rb_offset "\x00\x00"
+
+echo
+# The only leaks there can be are the old refcount structures that are
+# leaked during rebuilding, no need to clutter the output with them
+_check_test_img -r all | grep -v '^Repairing cluster.*refcount=1 reference=0'
+echo
+
+# Check whether the reftable was put where we expected
+rt_offset=$(peek_file_be "$TEST_IMG" 48 8)
+if [[ $rt_offset -eq $data_4k_offset ]]; then
+ echo 'OK: Reftable is where we expect it'
+else
+ echo "ERROR: Reftable is at $rt_offset, but was expected at $data_4k_offset"
+fi
+
+echo
+echo '--- Rebuilding refcount structures on block devices ---'
+echo
+
+# A block device cannot really grow, at least not during qemu-img
+# check. As mentioned in the above cases, rebuilding the refcount
+# structure may lead to new refcount structures being written after
+# the end of the image, and in the past that happened even if there
+# was more than sufficient space in the image. Such post-EOF writes
+# will not work on block devices, so test that the new algorithm
+# avoids it.
+
+# If we have passwordless sudo and losetup, we can use those to create
+# a block device. Otherwise, we can resort to qemu's FUSE export to
+# create a file that isn't growable, which effectively tests the same
+# thing.
+
+_cleanup_test_img
+truncate -s $((64 * 1024 * 1024)) "$TEST_IMG"
+
+if $loopdev; then
+ export_mp=$(sudo -n losetup --show -f "$TEST_IMG")
+ export_mp_driver=host_device
+ sudo -n chmod go+rw "$export_mp"
+else
+ # Create non-growable FUSE export that is a bit like an empty
+ # block device
+ export_mp="$TEST_DIR/fuse-export"
+ export_mp_driver=file
+ touch "$export_mp"
+
+ $QSD \
+ --blockdev file,node-name=export-node,filename="$TEST_IMG" \
+ --export fuse,id=fuse-export,node-name=export-node,mountpoint="$export_mp",writable=on,growable=off \
+ --pidfile "$TEST_DIR/qsd.pid" \
+ &
+
+ while [ ! -f "$TEST_DIR/qsd.pid" ]; do
+ sleep 0.1
+ done
+fi
+
+# Now create a qcow2 image on the device -- unfortunately, qemu-img
+# create force-creates the file, so we have to resort to the
+# blockdev-create job.
+_launch_qemu \
+ --blockdev $export_mp_driver,node-name=file,filename="$export_mp"
+
+_send_qemu_cmd \
+ $QEMU_HANDLE \
+ '{ "execute": "qmp_capabilities" }' \
+ 'return'
+
+# Small cluster size again, so the image needs multiple refblocks
+_send_qemu_cmd \
+ $QEMU_HANDLE \
+ '{ "execute": "blockdev-create",
+ "arguments": {
+ "job-id": "create",
+ "options": {
+ "driver": "qcow2",
+ "file": "file",
+ "size": '$((64 * 1024 * 1024))',
+ "cluster-size": 512
+ } } }' \
+ '"concluded"'
+
+_send_qemu_cmd \
+ $QEMU_HANDLE \
+ '{ "execute": "job-dismiss", "arguments": { "id": "create" } }' \
+ 'return'
+
+_send_qemu_cmd \
+ $QEMU_HANDLE \
+ '{ "execute": "quit" }' \
+ 'return'
+
+wait=y _cleanup_qemu
+echo
+
+# Write some data
+$QEMU_IO -c 'write 0 64k' "$export_mp" | _filter_qemu_io
+
+# Corrupt the image by saying the image header was not allocated
+rt_offset=$(peek_file_be "$export_mp" 48 8)
+rb_offset=$(peek_file_be "$export_mp" $rt_offset 8)
+poke_file "$export_mp" $rb_offset "\x00\x00"
+
+# Repairing such a simple case should just work
+# (We used to put the reftable at the end of the image file, which can
+# never work for non-growable devices.)
+echo
+TEST_IMG="$export_mp" _check_test_img -r all \
+ | grep -v '^Repairing cluster.*refcount=1 reference=0'
+
+if $loopdev; then
+ sudo -n losetup -d "$export_mp"
+else
+ qsd_pid=$(cat "$TEST_DIR/qsd.pid")
+ kill -TERM "$qsd_pid"
+ # Wait for process to exit (cannot `wait` because the QSD is daemonized)
+ while [ -f "$TEST_DIR/qsd.pid" ]; do
+ true
+ done
+fi
+
# success, all done
echo '*** done'
rm -f $seq.full
diff --git a/tests/qemu-iotests/108.out b/tests/qemu-iotests/108.out
index 75bab8dc84..b5401d788d 100644
--- a/tests/qemu-iotests/108.out
+++ b/tests/qemu-iotests/108.out
@@ -105,6 +105,87 @@ The following inconsistencies were found and repaired:
0 leaked clusters
1 corruptions
+Double checking the fixed image now...
+No errors were found on the image.
+
+=== Check rebuilt reftable location ===
+
+--- Does the image size increase? ---
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
+wrote 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+ERROR cluster 0 refcount=0 reference=1
+Rebuilding refcount structure
+The following inconsistencies were found and repaired:
+
+ 0 leaked clusters
+ 1 corruptions
+
+Double checking the fixed image now...
+No errors were found on the image.
+
+OK: Image size did not change
+
+--- Will the reftable occupy a hole specifically left for it? ---
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=9437184
+wrote 8388608/8388608 bytes at offset 0
+8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+discard 512/512 bytes at offset 0
+512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+discard 1024/1024 bytes at offset 4096
+1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+ERROR cluster 0 refcount=0 reference=1
+Rebuilding refcount structure
+The following inconsistencies were found and repaired:
+
+ 0 leaked clusters
+ 1 corruptions
+
+Double checking the fixed image now...
+No errors were found on the image.
+
+OK: Reftable is where we expect it
+
+--- Rebuilding refcount structures on block devices ---
+
+{ "execute": "qmp_capabilities" }
+{"return": {}}
+{ "execute": "blockdev-create",
+ "arguments": {
+ "job-id": "create",
+ "options": {
+ "driver": "IMGFMT",
+ "file": "file",
+ "size": 67108864,
+ "cluster-size": 512
+ } } }
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "create"}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "create"}}
+{"return": {}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "create"}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "create"}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "create"}}
+{ "execute": "job-dismiss", "arguments": { "id": "create" } }
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "create"}}
+{"return": {}}
+{ "execute": "quit" }
+{"return": {}}
+{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
+
+wrote 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+ERROR cluster 0 refcount=0 reference=1
+Rebuilding refcount structure
+The following inconsistencies were found and repaired:
+
+ 0 leaked clusters
+ 1 corruptions
+
Double checking the fixed image now...
No errors were found on the image.
*** done
--
2.27.0

162
SOURCES/kvm-qcow2-Add-errp-to-rebuild_refcount_structure.patch Normal file
View File

@ -0,0 +1,162 @@
From 6c475f4bc2c323d75d40eb37386fbb86819791ec Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Tue, 5 Apr 2022 15:46:52 +0200
Subject: [PATCH 10/11] qcow2: Add errp to rebuild_refcount_structure()
RH-Author: Hanna Reitz <hreitz@redhat.com>
RH-MergeRequest: 173: qcow2: Improve refcount structure rebuilding
RH-Commit: [3/4] 95a6b7bb558a9ed35afae3fa9fefd761312ecb3b
RH-Bugzilla: 2072242
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Instead of fprint()-ing error messages in rebuild_refcount_structure()
and its rebuild_refcounts_write_refblocks() helper, pass them through an
Error object to qcow2_check_refcounts() (which will then print it).
Suggested-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220405134652.19278-4-hreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit 0423f75351ab83b844a31349218b0eadd830e07a)
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
block/qcow2-refcount.c | 33 +++++++++++++++++++--------------
1 file changed, 19 insertions(+), 14 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 555d8ba5ac..09f8ef4927 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -2462,7 +2462,8 @@ static int64_t alloc_clusters_imrt(BlockDriverState *bs,
static int rebuild_refcounts_write_refblocks(
BlockDriverState *bs, void **refcount_table, int64_t *nb_clusters,
int64_t first_cluster, int64_t end_cluster,
- uint64_t **on_disk_reftable_ptr, uint32_t *on_disk_reftable_entries_ptr
+ uint64_t **on_disk_reftable_ptr, uint32_t *on_disk_reftable_entries_ptr,
+ Error **errp
)
{
BDRVQcow2State *s = bs->opaque;
@@ -2513,8 +2514,8 @@ static int rebuild_refcounts_write_refblocks(
nb_clusters,
&first_free_cluster);
if (refblock_offset < 0) {
- fprintf(stderr, "ERROR allocating refblock: %s\n",
- strerror(-refblock_offset));
+ error_setg_errno(errp, -refblock_offset,
+ "ERROR allocating refblock");
return refblock_offset;
}
@@ -2536,6 +2537,7 @@ static int rebuild_refcounts_write_refblocks(
on_disk_reftable_entries *
REFTABLE_ENTRY_SIZE);
if (!on_disk_reftable) {
+ error_setg(errp, "ERROR allocating reftable memory");
return -ENOMEM;
}
@@ -2559,7 +2561,7 @@ static int rebuild_refcounts_write_refblocks(
ret = qcow2_pre_write_overlap_check(bs, 0, refblock_offset,
s->cluster_size, false);
if (ret < 0) {
- fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));
+ error_setg_errno(errp, -ret, "ERROR writing refblock");
return ret;
}
@@ -2575,7 +2577,7 @@ static int rebuild_refcounts_write_refblocks(
ret = bdrv_pwrite(bs->file, refblock_offset, on_disk_refblock,
s->cluster_size);
if (ret < 0) {
- fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));
+ error_setg_errno(errp, -ret, "ERROR writing refblock");
return ret;
}
@@ -2598,7 +2600,8 @@ static int rebuild_refcounts_write_refblocks(
static int rebuild_refcount_structure(BlockDriverState *bs,
BdrvCheckResult *res,
void **refcount_table,
- int64_t *nb_clusters)
+ int64_t *nb_clusters,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int64_t reftable_offset = -1;
@@ -2649,7 +2652,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
rebuild_refcounts_write_refblocks(bs, refcount_table, nb_clusters,
0, *nb_clusters,
&on_disk_reftable,
- &on_disk_reftable_entries);
+ &on_disk_reftable_entries, errp);
if (reftable_size_changed < 0) {
res->check_errors++;
ret = reftable_size_changed;
@@ -2673,8 +2676,8 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
refcount_table, nb_clusters,
&first_free_cluster);
if (reftable_offset < 0) {
- fprintf(stderr, "ERROR allocating reftable: %s\n",
- strerror(-reftable_offset));
+ error_setg_errno(errp, -reftable_offset,
+ "ERROR allocating reftable");
res->check_errors++;
ret = reftable_offset;
goto fail;
@@ -2692,7 +2695,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
reftable_start_cluster,
reftable_end_cluster,
&on_disk_reftable,
- &on_disk_reftable_entries);
+ &on_disk_reftable_entries, errp);
if (reftable_size_changed < 0) {
res->check_errors++;
ret = reftable_size_changed;
@@ -2722,7 +2725,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
ret = qcow2_pre_write_overlap_check(bs, 0, reftable_offset, reftable_length,
false);
if (ret < 0) {
- fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));
+ error_setg_errno(errp, -ret, "ERROR writing reftable");
goto fail;
}
@@ -2730,7 +2733,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
ret = bdrv_pwrite(bs->file, reftable_offset, on_disk_reftable,
reftable_length);
if (ret < 0) {
- fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));
+ error_setg_errno(errp, -ret, "ERROR writing reftable");
goto fail;
}
@@ -2743,7 +2746,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
&reftable_offset_and_clusters,
sizeof(reftable_offset_and_clusters));
if (ret < 0) {
- fprintf(stderr, "ERROR setting reftable: %s\n", strerror(-ret));
+ error_setg_errno(errp, -ret, "ERROR setting reftable");
goto fail;
}
@@ -2811,11 +2814,13 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
if (rebuild && (fix & BDRV_FIX_ERRORS)) {
BdrvCheckResult old_res = *res;
int fresh_leaks = 0;
+ Error *local_err = NULL;
fprintf(stderr, "Rebuilding refcount structure\n");
ret = rebuild_refcount_structure(bs, res, &refcount_table,
- &nb_clusters);
+ &nb_clusters, &local_err);
if (ret < 0) {
+ error_report_err(local_err);
goto fail;
}
--
2.27.0

465
SOURCES/kvm-qcow2-Improve-refcount-structure-rebuilding.patch Normal file
View File

@ -0,0 +1,465 @@
From 3daca05a8f845d2a389a6cf767314bcb72109578 Mon Sep 17 00:00:00 2001
From: Hanna Reitz <hreitz@redhat.com>
Date: Tue, 5 Apr 2022 15:46:50 +0200
Subject: [PATCH 08/11] qcow2: Improve refcount structure rebuilding
RH-Author: Hanna Reitz <hreitz@redhat.com>
RH-MergeRequest: 173: qcow2: Improve refcount structure rebuilding
RH-Commit: [1/4] 586e7a0fc3cb7cc2296b544ffcef34d8395fa74c
RH-Bugzilla: 2072242
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
When rebuilding the refcount structures (when qemu-img check -r found
errors with refcount = 0, but reference count > 0), the new refcount
table defaults to being put at the image file end[1]. There is no good
reason for that except that it means we will not have to rewrite any
refblocks we already wrote to disk.
Changing the code to rewrite those refblocks is not too difficult,
though, so let us do that. That is beneficial for images on block
devices, where we cannot really write beyond the end of the image file.
Use this opportunity to add extensive comments to the code, and refactor
it a bit, getting rid of the backwards-jumping goto.
[1] Unless there is something allocated in the area pointed to by the
last refblock, so we have to write that refblock. In that case, we
try to put the reftable in there.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1519071
Closes: https://gitlab.com/qemu-project/qemu/-/issues/941
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220405134652.19278-2-hreitz@redhat.com>
(cherry picked from commit a8c07ec287554dcefd33733f0e5888a281ddc95e)
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
---
block/qcow2-refcount.c | 332 +++++++++++++++++++++++++++++------------
1 file changed, 235 insertions(+), 97 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 4614572252..555d8ba5ac 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -2435,111 +2435,140 @@ static int64_t alloc_clusters_imrt(BlockDriverState *bs,
}
/*
- * Creates a new refcount structure based solely on the in-memory information
- * given through *refcount_table. All necessary allocations will be reflected
- * in that array.
+ * Helper function for rebuild_refcount_structure().
*
- * On success, the old refcount structure is leaked (it will be covered by the
- * new refcount structure).
+ * Scan the range of clusters [first_cluster, end_cluster) for allocated
+ * clusters and write all corresponding refblocks to disk. The refblock
+ * and allocation data is taken from the in-memory refcount table
+ * *refcount_table[] (of size *nb_clusters), which is basically one big
+ * (unlimited size) refblock for the whole image.
+ *
+ * For these refblocks, clusters are allocated using said in-memory
+ * refcount table. Care is taken that these allocations are reflected
+ * in the refblocks written to disk.
+ *
+ * The refblocks' offsets are written into a reftable, which is
+ * *on_disk_reftable_ptr[] (of size *on_disk_reftable_entries_ptr). If
+ * that reftable is of insufficient size, it will be resized to fit.
+ * This reftable is not written to disk.
+ *
+ * (If *on_disk_reftable_ptr is not NULL, the entries within are assumed
+ * to point to existing valid refblocks that do not need to be allocated
+ * again.)
+ *
+ * Return whether the on-disk reftable array was resized (true/false),
+ * or -errno on error.
*/
-static int rebuild_refcount_structure(BlockDriverState *bs,
- BdrvCheckResult *res,
- void **refcount_table,
- int64_t *nb_clusters)
+static int rebuild_refcounts_write_refblocks(
+ BlockDriverState *bs, void **refcount_table, int64_t *nb_clusters,
+ int64_t first_cluster, int64_t end_cluster,
+ uint64_t **on_disk_reftable_ptr, uint32_t *on_disk_reftable_entries_ptr
+ )
{
BDRVQcow2State *s = bs->opaque;
- int64_t first_free_cluster = 0, reftable_offset = -1, cluster = 0;
+ int64_t cluster;
int64_t refblock_offset, refblock_start, refblock_index;
- uint32_t reftable_size = 0;
- uint64_t *on_disk_reftable = NULL;
+ int64_t first_free_cluster = 0;
+ uint64_t *on_disk_reftable = *on_disk_reftable_ptr;
+ uint32_t on_disk_reftable_entries = *on_disk_reftable_entries_ptr;
void *on_disk_refblock;
- int ret = 0;
- struct {
- uint64_t reftable_offset;
- uint32_t reftable_clusters;
- } QEMU_PACKED reftable_offset_and_clusters;
-
- qcow2_cache_empty(bs, s->refcount_block_cache);
+ bool reftable_grown = false;
+ int ret;
-write_refblocks:
- for (; cluster < *nb_clusters; cluster++) {
+ for (cluster = first_cluster; cluster < end_cluster; cluster++) {
+ /* Check all clusters to find refblocks that contain non-zero entries */
if (!s->get_refcount(*refcount_table, cluster)) {
continue;
}
+ /*
+ * This cluster is allocated, so we need to create a refblock
+ * for it. The data we will write to disk is just the
+ * respective slice from *refcount_table, so it will contain
+ * accurate refcounts for all clusters belonging to this
+ * refblock. After we have written it, we will therefore skip
+ * all remaining clusters in this refblock.
+ */
+
refblock_index = cluster >> s->refcount_block_bits;
refblock_start = refblock_index << s->refcount_block_bits;
- /* Don't allocate a cluster in a refblock already written to disk */
- if (first_free_cluster < refblock_start) {
- first_free_cluster = refblock_start;
- }
- refblock_offset = alloc_clusters_imrt(bs, 1, refcount_table,
- nb_clusters, &first_free_cluster);
- if (refblock_offset < 0) {
- fprintf(stderr, "ERROR allocating refblock: %s\n",
- strerror(-refblock_offset));
- res->check_errors++;
- ret = refblock_offset;
- goto fail;
- }
+ if (on_disk_reftable_entries > refblock_index &&
+ on_disk_reftable[refblock_index])
+ {
+ /*
+ * We can get here after a `goto write_refblocks`: We have a
+ * reftable from a previous run, and the refblock is already
+ * allocated. No need to allocate it again.
+ */
+ refblock_offset = on_disk_reftable[refblock_index];
+ } else {
+ int64_t refblock_cluster_index;
- if (reftable_size <= refblock_index) {
- uint32_t old_reftable_size = reftable_size;
- uint64_t *new_on_disk_reftable;
+ /* Don't allocate a cluster in a refblock already written to disk */
+ if (first_free_cluster < refblock_start) {
+ first_free_cluster = refblock_start;
+ }
+ refblock_offset = alloc_clusters_imrt(bs, 1, refcount_table,
+ nb_clusters,
+ &first_free_cluster);
+ if (refblock_offset < 0) {
+ fprintf(stderr, "ERROR allocating refblock: %s\n",
+ strerror(-refblock_offset));
+ return refblock_offset;
+ }
- reftable_size = ROUND_UP((refblock_index + 1) * REFTABLE_ENTRY_SIZE,
- s->cluster_size) / REFTABLE_ENTRY_SIZE;
- new_on_disk_reftable = g_try_realloc(on_disk_reftable,
- reftable_size *
- REFTABLE_ENTRY_SIZE);
- if (!new_on_disk_reftable) {
- res->check_errors++;
- ret = -ENOMEM;
- goto fail;
+ refblock_cluster_index = refblock_offset / s->cluster_size;
+ if (refblock_cluster_index >= end_cluster) {
+ /*
+ * We must write the refblock that holds this refblock's
+ * refcount
+ */
+ end_cluster = refblock_cluster_index + 1;
}
- on_disk_reftable = new_on_disk_reftable;
- memset(on_disk_reftable + old_reftable_size, 0,
- (reftable_size - old_reftable_size) * REFTABLE_ENTRY_SIZE);
+ if (on_disk_reftable_entries <= refblock_index) {
+ on_disk_reftable_entries =
+ ROUND_UP((refblock_index + 1) * REFTABLE_ENTRY_SIZE,
+ s->cluster_size) / REFTABLE_ENTRY_SIZE;
+ on_disk_reftable =
+ g_try_realloc(on_disk_reftable,
+ on_disk_reftable_entries *
+ REFTABLE_ENTRY_SIZE);
+ if (!on_disk_reftable) {
+ return -ENOMEM;
+ }
- /* The offset we have for the reftable is now no longer valid;
- * this will leak that range, but we can easily fix that by running
- * a leak-fixing check after this rebuild operation */
- reftable_offset = -1;
- } else {
- assert(on_disk_reftable);
- }
- on_disk_reftable[refblock_index] = refblock_offset;
+ memset(on_disk_reftable + *on_disk_reftable_entries_ptr, 0,
+ (on_disk_reftable_entries -
+ *on_disk_reftable_entries_ptr) *
+ REFTABLE_ENTRY_SIZE);
- /* If this is apparently the last refblock (for now), try to squeeze the
- * reftable in */
- if (refblock_index == (*nb_clusters - 1) >> s->refcount_block_bits &&
- reftable_offset < 0)
- {
- uint64_t reftable_clusters = size_to_clusters(s, reftable_size *
- REFTABLE_ENTRY_SIZE);
- reftable_offset = alloc_clusters_imrt(bs, reftable_clusters,
- refcount_table, nb_clusters,
- &first_free_cluster);
- if (reftable_offset < 0) {
- fprintf(stderr, "ERROR allocating reftable: %s\n",
- strerror(-reftable_offset));
- res->check_errors++;
- ret = reftable_offset;
- goto fail;
+ *on_disk_reftable_ptr = on_disk_reftable;
+ *on_disk_reftable_entries_ptr = on_disk_reftable_entries;
+
+ reftable_grown = true;
+ } else {
+ assert(on_disk_reftable);
}
+ on_disk_reftable[refblock_index] = refblock_offset;
}
+ /* Refblock is allocated, write it to disk */
+
ret = qcow2_pre_write_overlap_check(bs, 0, refblock_offset,
s->cluster_size, false);
if (ret < 0) {
fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));
- goto fail;
+ return ret;
}
- /* The size of *refcount_table is always cluster-aligned, therefore the
- * write operation will not overflow */
+ /*
+ * The refblock is simply a slice of *refcount_table.
+ * Note that the size of *refcount_table is always aligned to
+ * whole clusters, so the write operation will not result in
+ * out-of-bounds accesses.
+ */
on_disk_refblock = (void *)((char *) *refcount_table +
refblock_index * s->cluster_size);
@@ -2547,23 +2576,99 @@ write_refblocks:
s->cluster_size);
if (ret < 0) {
fprintf(stderr, "ERROR writing refblock: %s\n", strerror(-ret));
- goto fail;
+ return ret;
}
- /* Go to the end of this refblock */
+ /* This refblock is done, skip to its end */
cluster = refblock_start + s->refcount_block_size - 1;
}
- if (reftable_offset < 0) {
- uint64_t post_refblock_start, reftable_clusters;
+ return reftable_grown;
+}
+
+/*
+ * Creates a new refcount structure based solely on the in-memory information
+ * given through *refcount_table (this in-memory information is basically just
+ * the concatenation of all refblocks). All necessary allocations will be
+ * reflected in that array.
+ *
+ * On success, the old refcount structure is leaked (it will be covered by the
+ * new refcount structure).
+ */
+static int rebuild_refcount_structure(BlockDriverState *bs,
+ BdrvCheckResult *res,
+ void **refcount_table,
+ int64_t *nb_clusters)
+{
+ BDRVQcow2State *s = bs->opaque;
+ int64_t reftable_offset = -1;
+ int64_t reftable_length = 0;
+ int64_t reftable_clusters;
+ int64_t refblock_index;
+ uint32_t on_disk_reftable_entries = 0;
+ uint64_t *on_disk_reftable = NULL;
+ int ret = 0;
+ int reftable_size_changed = 0;
+ struct {
+ uint64_t reftable_offset;
+ uint32_t reftable_clusters;
+ } QEMU_PACKED reftable_offset_and_clusters;
+
+ qcow2_cache_empty(bs, s->refcount_block_cache);
+
+ /*
+ * For each refblock containing entries, we try to allocate a
+ * cluster (in the in-memory refcount table) and write its offset
+ * into on_disk_reftable[]. We then write the whole refblock to
+ * disk (as a slice of the in-memory refcount table).
+ * This is done by rebuild_refcounts_write_refblocks().
+ *
+ * Once we have scanned all clusters, we try to find space for the
+ * reftable. This will dirty the in-memory refcount table (i.e.
+ * make it differ from the refblocks we have already written), so we
+ * need to run rebuild_refcounts_write_refblocks() again for the
+ * range of clusters where the reftable has been allocated.
+ *
+ * This second run might make the reftable grow again, in which case
+ * we will need to allocate another space for it, which is why we
+ * repeat all this until the reftable stops growing.
+ *
+ * (This loop will terminate, because with every cluster the
+ * reftable grows, it can accomodate a multitude of more refcounts,
+ * so that at some point this must be able to cover the reftable
+ * and all refblocks describing it.)
+ *
+ * We then convert the reftable to big-endian and write it to disk.
+ *
+ * Note that we never free any reftable allocations. Doing so would
+ * needlessly complicate the algorithm: The eventual second check
+ * run we do will clean up all leaks we have caused.
+ */
+
+ reftable_size_changed =
+ rebuild_refcounts_write_refblocks(bs, refcount_table, nb_clusters,
+ 0, *nb_clusters,
+ &on_disk_reftable,
+ &on_disk_reftable_entries);
+ if (reftable_size_changed < 0) {
+ res->check_errors++;
+ ret = reftable_size_changed;
+ goto fail;
+ }
+
+ /*
+ * There was no reftable before, so rebuild_refcounts_write_refblocks()
+ * must have increased its size (from 0 to something).
+ */
+ assert(reftable_size_changed);
+
+ do {
+ int64_t reftable_start_cluster, reftable_end_cluster;
+ int64_t first_free_cluster = 0;
+
+ reftable_length = on_disk_reftable_entries * REFTABLE_ENTRY_SIZE;
+ reftable_clusters = size_to_clusters(s, reftable_length);
- post_refblock_start = ROUND_UP(*nb_clusters, s->refcount_block_size);
- reftable_clusters =
- size_to_clusters(s, reftable_size * REFTABLE_ENTRY_SIZE);
- /* Not pretty but simple */
- if (first_free_cluster < post_refblock_start) {
- first_free_cluster = post_refblock_start;
- }
reftable_offset = alloc_clusters_imrt(bs, reftable_clusters,
refcount_table, nb_clusters,
&first_free_cluster);
@@ -2575,24 +2680,55 @@ write_refblocks:
goto fail;
}
- goto write_refblocks;
- }
+ /*
+ * We need to update the affected refblocks, so re-run the
+ * write_refblocks loop for the reftable's range of clusters.
+ */
+ assert(offset_into_cluster(s, reftable_offset) == 0);
+ reftable_start_cluster = reftable_offset / s->cluster_size;
+ reftable_end_cluster = reftable_start_cluster + reftable_clusters;
+ reftable_size_changed =
+ rebuild_refcounts_write_refblocks(bs, refcount_table, nb_clusters,
+ reftable_start_cluster,
+ reftable_end_cluster,
+ &on_disk_reftable,
+ &on_disk_reftable_entries);
+ if (reftable_size_changed < 0) {
+ res->check_errors++;
+ ret = reftable_size_changed;
+ goto fail;
+ }
+
+ /*
+ * If the reftable size has changed, we will need to find a new
+ * allocation, repeating the loop.
+ */
+ } while (reftable_size_changed);
- for (refblock_index = 0; refblock_index < reftable_size; refblock_index++) {
+ /* The above loop must have run at least once */
+ assert(reftable_offset >= 0);
+
+ /*
+ * All allocations are done, all refblocks are written, convert the
+ * reftable to big-endian and write it to disk.
+ */
+
+ for (refblock_index = 0; refblock_index < on_disk_reftable_entries;
+ refblock_index++)
+ {
cpu_to_be64s(&on_disk_reftable[refblock_index]);
}
- ret = qcow2_pre_write_overlap_check(bs, 0, reftable_offset,
- reftable_size * REFTABLE_ENTRY_SIZE,
+ ret = qcow2_pre_write_overlap_check(bs, 0, reftable_offset, reftable_length,
false);
if (ret < 0) {
fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));
goto fail;
}
- assert(reftable_size < INT_MAX / REFTABLE_ENTRY_SIZE);
+ assert(reftable_length < INT_MAX);
ret = bdrv_pwrite(bs->file, reftable_offset, on_disk_reftable,
- reftable_size * REFTABLE_ENTRY_SIZE);
+ reftable_length);
if (ret < 0) {
fprintf(stderr, "ERROR writing reftable: %s\n", strerror(-ret));
goto fail;
@@ -2601,7 +2737,7 @@ write_refblocks:
/* Enter new reftable into the image header */
reftable_offset_and_clusters.reftable_offset = cpu_to_be64(reftable_offset);
reftable_offset_and_clusters.reftable_clusters =
- cpu_to_be32(size_to_clusters(s, reftable_size * REFTABLE_ENTRY_SIZE));
+ cpu_to_be32(reftable_clusters);
ret = bdrv_pwrite_sync(bs->file,
offsetof(QCowHeader, refcount_table_offset),
&reftable_offset_and_clusters,
@@ -2611,12 +2747,14 @@ write_refblocks:
goto fail;
}
- for (refblock_index = 0; refblock_index < reftable_size; refblock_index++) {
+ for (refblock_index = 0; refblock_index < on_disk_reftable_entries;
+ refblock_index++)
+ {
be64_to_cpus(&on_disk_reftable[refblock_index]);
}
s->refcount_table = on_disk_reftable;
s->refcount_table_offset = reftable_offset;
- s->refcount_table_size = reftable_size;
+ s->refcount_table_size = on_disk_reftable_entries;
update_max_refcount_table_index(s);
return 0;
--
2.27.0

176
SOURCES/kvm-softmmu-physmem-Introduce-MemTxAttrs-memory-field-an.patch Normal file
View File

@ -0,0 +1,176 @@
From b1eae36683cdfe63af5749b5fe86b1c08fc0f63e Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Wed, 13 Apr 2022 14:51:06 -0400
Subject: [PATCH 04/11] softmmu/physmem: Introduce MemTxAttrs::memory field and
MEMTX_ACCESS_ERROR
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 158: hw/intc/arm_gicv3: Check for !MEMTX_OK instead of MEMTX_ERROR
RH-Commit: [3/3] 84d64fe85a106f8faf579e43266d4349fc8e65b4 (jmaloy/qemu-kvm)
RH-Bugzilla: 2075686
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2075686
Upstream: Merged
CVE: CVE-2021-3750
Conflicts: memalign.h has not been introduced in this version. Instead,
we include osdep.h where the function prototypes are to be
found.
commit 3ab6fdc91b72e156da22848f0003ff4225690ced
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: Wed Dec 15 19:24:21 2021 +0100
softmmu/physmem: Introduce MemTxAttrs::memory field and MEMTX_ACCESS_ERROR
Add the 'memory' bit to the memory attributes to restrict bus
controller accesses to memories.
Introduce flatview_access_allowed() to check bus permission
before running any bus transaction.
Have read/write accessors return MEMTX_ACCESS_ERROR if an access is
restricted.
There is no change for the default case where 'memory' is not set.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211215182421.418374-4-philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
[thuth: Replaced MEMTX_BUS_ERROR with MEMTX_ACCESS_ERROR, remove "inline"]
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 3ab6fdc91b72e156da22848f0003ff4225690ced)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
include/exec/memattrs.h | 9 +++++++++
softmmu/physmem.c | 45 +++++++++++++++++++++++++++++++++++++++--
2 files changed, 52 insertions(+), 2 deletions(-)
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 95f2d20d55..9fb98bc1ef 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -35,6 +35,14 @@ typedef struct MemTxAttrs {
unsigned int secure:1;
/* Memory access is usermode (unprivileged) */
unsigned int user:1;
+ /*
+ * Bus interconnect and peripherals can access anything (memories,
+ * devices) by default. By setting the 'memory' bit, bus transaction
+ * are restricted to "normal" memories (per the AMBA documentation)
+ * versus devices. Access to devices will be logged and rejected
+ * (see MEMTX_ACCESS_ERROR).
+ */
+ unsigned int memory:1;
/* Requester ID (for MSI for example) */
unsigned int requester_id:16;
/* Invert endianness for this page */
@@ -66,6 +74,7 @@ typedef struct MemTxAttrs {
#define MEMTX_OK 0
#define MEMTX_ERROR (1U << 0) /* device returned an error */
#define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */
+#define MEMTX_ACCESS_ERROR (1U << 2) /* access denied */
typedef uint32_t MemTxResult;
#endif
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 483a31be81..4d0ef5f92f 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -41,6 +41,8 @@
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/qemu-print.h"
+#include "qemu/log.h"
+#include "qemu/osdep.h"
#include "exec/memory.h"
#include "exec/ioport.h"
#include "sysemu/dma.h"
@@ -2759,6 +2761,33 @@ static bool prepare_mmio_access(MemoryRegion *mr)
return release_lock;
}
+/**
+ * flatview_access_allowed
+ * @mr: #MemoryRegion to be accessed
+ * @attrs: memory transaction attributes
+ * @addr: address within that memory region
+ * @len: the number of bytes to access
+ *
+ * Check if a memory transaction is allowed.
+ *
+ * Returns: true if transaction is allowed, false if denied.
+ */
+static bool flatview_access_allowed(MemoryRegion *mr, MemTxAttrs attrs,
+ hwaddr addr, hwaddr len)
+{
+ if (likely(!attrs.memory)) {
+ return true;
+ }
+ if (memory_region_is_ram(mr)) {
+ return true;
+ }
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Invalid access to non-RAM device at "
+ "addr 0x%" HWADDR_PRIX ", size %" HWADDR_PRIu ", "
+ "region '%s'\n", addr, len, memory_region_name(mr));
+ return false;
+}
+
/* Called within RCU critical section. */
static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
MemTxAttrs attrs,
@@ -2773,7 +2802,10 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
const uint8_t *buf = ptr;
for (;;) {
- if (!memory_access_is_direct(mr, true)) {
+ if (!flatview_access_allowed(mr, attrs, addr1, l)) {
+ result |= MEMTX_ACCESS_ERROR;
+ /* Keep going. */
+ } else if (!memory_access_is_direct(mr, true)) {
release_lock |= prepare_mmio_access(mr);
l = memory_access_size(mr, l, addr1);
/* XXX: could force current_cpu to NULL to avoid
@@ -2818,6 +2850,9 @@ static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
l = len;
mr = flatview_translate(fv, addr, &addr1, &l, true, attrs);
+ if (!flatview_access_allowed(mr, attrs, addr, len)) {
+ return MEMTX_ACCESS_ERROR;
+ }
return flatview_write_continue(fv, addr, attrs, buf, len,
addr1, l, mr);
}
@@ -2836,7 +2871,10 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
fuzz_dma_read_cb(addr, len, mr);
for (;;) {
- if (!memory_access_is_direct(mr, false)) {
+ if (!flatview_access_allowed(mr, attrs, addr1, l)) {
+ result |= MEMTX_ACCESS_ERROR;
+ /* Keep going. */
+ } else if (!memory_access_is_direct(mr, false)) {
/* I/O case */
release_lock |= prepare_mmio_access(mr);
l = memory_access_size(mr, l, addr1);
@@ -2879,6 +2917,9 @@ static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
l = len;
mr = flatview_translate(fv, addr, &addr1, &l, false, attrs);
+ if (!flatview_access_allowed(mr, attrs, addr, len)) {
+ return MEMTX_ACCESS_ERROR;
+ }
return flatview_read_continue(fv, addr, attrs, buf, len,
addr1, l, mr);
}
--
2.27.0

81
SOURCES/kvm-softmmu-physmem-Simplify-flatview_write-and-address_.patch Normal file
View File

@ -0,0 +1,81 @@
From b570eb3a78a3096af55979ce63d96f5fc012f9e5 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Wed, 13 Apr 2022 14:51:06 -0400
Subject: [PATCH 03/11] softmmu/physmem: Simplify flatview_write and
address_space_access_valid
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 158: hw/intc/arm_gicv3: Check for !MEMTX_OK instead of MEMTX_ERROR
RH-Commit: [2/3] 66281d1c439be549c7890a662a817dd1b9367ef2 (jmaloy/qemu-kvm)
RH-Bugzilla: 2075686
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Peter Xu <peterx@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2075686
Upstream: Merged
CVE: CVE-2021-3750
commit 58e74682baf4e1ad26b064d8c02e5bc99c75c5d9
Author: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: Wed Dec 15 19:24:20 2021 +0100
softmmu/physmem: Simplify flatview_write and address_space_access_valid
Remove unuseful local 'result' variables.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211215182421.418374-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 58e74682baf4e1ad26b064d8c02e5bc99c75c5d9)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
softmmu/physmem.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 3524c04c2a..483a31be81 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -2815,14 +2815,11 @@ static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
hwaddr l;
hwaddr addr1;
MemoryRegion *mr;
- MemTxResult result = MEMTX_OK;
l = len;
mr = flatview_translate(fv, addr, &addr1, &l, true, attrs);
- result = flatview_write_continue(fv, addr, attrs, buf, len,
- addr1, l, mr);
-
- return result;
+ return flatview_write_continue(fv, addr, attrs, buf, len,
+ addr1, l, mr);
}
/* Called within RCU critical section. */
@@ -3119,12 +3116,10 @@ bool address_space_access_valid(AddressSpace *as, hwaddr addr,
MemTxAttrs attrs)
{
FlatView *fv;
- bool result;
RCU_READ_LOCK_GUARD();
fv = address_space_to_flatview(as);
- result = flatview_access_valid(fv, addr, len, is_write, attrs);
- return result;
+ return flatview_access_valid(fv, addr, len, is_write, attrs);
}
static hwaddr
--
2.27.0

105
SOURCES/kvm-ui-cursor-fix-integer-overflow-in-cursor_alloc-CVE-2.patch Normal file
View File

@ -0,0 +1,105 @@
From 0a493615833edbe6448bc639200b4a5fa7d492e3 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Wed, 4 May 2022 10:35:17 -0400
Subject: [PATCH 2/2] ui/cursor: fix integer overflow in cursor_alloc
(CVE-2021-4206)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 190: ui/cursor: fix integer overflow in cursor_alloc (CVE-2021-4206)
RH-Commit: [1/1] 80588f646942c345a2491812cb41aacd4c0805ff (jmaloy/qemu-kvm)
RH-Bugzilla: 2082622
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Mauro Matteo Cascella <None>
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=2082622
Upstream: Merged
CVE: CVE-2021-4206
commit fa892e9abb728e76afcf27323ab29c57fb0fe7aa
Author: Mauro Matteo Cascella <mcascell@redhat.com>
Date: Thu Apr 7 10:17:12 2022 +0200
ui/cursor: fix integer overflow in cursor_alloc (CVE-2021-4206)
Prevent potential integer overflow by limiting 'width' and 'height' to
512x512. Also change 'datasize' type to size_t. Refer to security
advisory https://starlabs.sg/advisories/22-4206/ for more information.
Fixes: CVE-2021-4206
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220407081712.345609-1-mcascell@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit fa892e9abb728e76afcf27323ab29c57fb0fe7aa)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/display/qxl-render.c | 7 +++++++
hw/display/vmware_vga.c | 2 ++
ui/cursor.c | 8 +++++++-
3 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
index 237ed293ba..ca217004bf 100644
--- a/hw/display/qxl-render.c
+++ b/hw/display/qxl-render.c
@@ -247,6 +247,13 @@ static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor,
size_t size;
c = cursor_alloc(cursor->header.width, cursor->header.height);
+
+ if (!c) {
+ qxl_set_guest_bug(qxl, "%s: cursor %ux%u alloc error", __func__,
+ cursor->header.width, cursor->header.height);
+ goto fail;
+ }
+
c->hot_x = cursor->header.hot_spot_x;
c->hot_y = cursor->header.hot_spot_y;
switch (cursor->header.type) {
diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c
index e2969a6c81..2b81d6122f 100644
--- a/hw/display/vmware_vga.c
+++ b/hw/display/vmware_vga.c
@@ -509,6 +509,8 @@ static inline void vmsvga_cursor_define(struct vmsvga_state_s *s,
int i, pixels;
qc = cursor_alloc(c->width, c->height);
+ assert(qc != NULL);
+
qc->hot_x = c->hot_x;
qc->hot_y = c->hot_y;
switch (c->bpp) {
diff --git a/ui/cursor.c b/ui/cursor.c
index 1d62ddd4d0..835f0802f9 100644
--- a/ui/cursor.c
+++ b/ui/cursor.c
@@ -46,6 +46,8 @@ static QEMUCursor *cursor_parse_xpm(const char *xpm[])
/* parse pixel data */
c = cursor_alloc(width, height);
+ assert(c != NULL);
+
for (pixel = 0, y = 0; y < height; y++, line++) {
for (x = 0; x < height; x++, pixel++) {
idx = xpm[line][x];
@@ -91,7 +93,11 @@ QEMUCursor *cursor_builtin_left_ptr(void)
QEMUCursor *cursor_alloc(int width, int height)
{
QEMUCursor *c;
- int datasize = width * height * sizeof(uint32_t);
+ size_t datasize = width * height * sizeof(uint32_t);
+
+ if (width > 512 || height > 512) {
+ return NULL;
+ }
c = g_malloc0(sizeof(QEMUCursor) + datasize);
c->width = width;
--
2.35.3

78
SOURCES/kvm-vhost-vsock-detach-the-virqueue-element-in-case-of-e.patch Normal file
View File

@ -0,0 +1,78 @@
From 2abf617accf878bec7f1c0419d5b85c93b0aa426 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@rehat.com>
Date: Thu, 14 Apr 2022 10:38:26 -0400
Subject: [PATCH 07/11] vhost-vsock: detach the virqueue element in case of
error
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 168: vhost-vsock: detach the virqueue element in case of error
RH-Commit: [1/1] f81a39d26a7165f8b717fdeeb9526081cb73129b (jmaloy/qemu-kvm)
RH-Bugzilla: 2075639
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Jason Wang <jasowang@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2075639
Upstream: Merged
CVE: CVE-2022-26354
commit 8d1b247f3748ac4078524130c6d7ae42b6140aaf
Author: Stefano Garzarella <sgarzare@redhat.com>
Date: Mon Feb 28 10:50:58 2022 +0100
vhost-vsock: detach the virqueue element in case of error
In vhost_vsock_common_send_transport_reset(), if an element popped from
the virtqueue is invalid, we should call virtqueue_detach_element() to
detach it from the virtqueue before freeing its memory.
Fixes: fc0b9b0e1c ("vhost-vsock: add virtio sockets device")
Fixes: CVE-2022-26354
Cc: qemu-stable@nongnu.org
Reported-by: VictorV <vv474172261@gmail.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20220228095058.27899-1-sgarzare@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 8d1b247f3748ac4078524130c6d7ae42b6140aaf)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/virtio/vhost-vsock-common.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/hw/virtio/vhost-vsock-common.c b/hw/virtio/vhost-vsock-common.c
index 3f3771274e..ed706681ac 100644
--- a/hw/virtio/vhost-vsock-common.c
+++ b/hw/virtio/vhost-vsock-common.c
@@ -153,19 +153,23 @@ static void vhost_vsock_common_send_transport_reset(VHostVSockCommon *vvc)
if (elem->out_num) {
error_report("invalid vhost-vsock event virtqueue element with "
"out buffers");
- goto out;
+ goto err;
}
if (iov_from_buf(elem->in_sg, elem->in_num, 0,
&event, sizeof(event)) != sizeof(event)) {
error_report("vhost-vsock event virtqueue element is too short");
- goto out;
+ goto err;
}
virtqueue_push(vq, elem, sizeof(event));
virtio_notify(VIRTIO_DEVICE(vvc), vq);
-out:
+ g_free(elem);
+ return;
+
+err:
+ virtqueue_detach_element(vq, elem, 0);
g_free(elem);
}
--
2.27.0

63
SOURCES/kvm-virtio-net-fix-map-leaking-on-error-during-receive.patch Normal file
View File

@ -0,0 +1,63 @@
From ba9806fd38f113deb452156fdc644407f061311c Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Tue, 8 Mar 2022 10:42:51 +0800
Subject: [PATCH 06/11] virtio-net: fix map leaking on error during receive
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 165: virtio-net: fix map leaking on error during receive
RH-Commit: [1/1] f0546c74a5bfd37de473703f6a7c6f8f29fb0831 (jmaloy/qemu-kvm)
RH-Bugzilla: 2075637
RH-Acked-by: Mauro Matteo Cascella <None>
RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2075637
Upstream: Merged
CVE: CVE-2022-26353
commit abe300d9d894f7138e1af7c8e9c88c04bfe98b37
Author: Jason Wang <jasowang@redhat.com>
Date: Tue Mar 8 10:42:51 2022 +0800
virtio-net: fix map leaking on error during receive
Commit bedd7e93d0196 ("virtio-net: fix use after unmap/free for sg")
tries to fix the use after free of the sg by caching the virtqueue
elements in an array and unmap them at once after receiving the
packets, But it forgot to unmap the cached elements on error which
will lead to leaking of mapping and other unexpected results.
Fixing this by detaching the cached elements on error. This addresses
CVE-2022-26353.
Reported-by: Victor Tom <vv474172261@gmail.com>
Cc: qemu-stable@nongnu.org
Fixes: CVE-2022-26353
Fixes: bedd7e93d0196 ("virtio-net: fix use after unmap/free for sg")
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit abe300d9d894f7138e1af7c8e9c88c04bfe98b37)
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/net/virtio-net.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index f2014d5ea0..e1f4748831 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1862,6 +1862,7 @@ static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
err:
for (j = 0; j < i; j++) {
+ virtqueue_detach_element(q->rx_vq, elems[j], lens[j]);
g_free(elems[j]);
}
--
2.27.0

61
SPECS/qemu-kvm.spec
View File

@ -83,7 +83,7 @@ Obsoletes: %1-rhev <= %{epoch}:%{version}-%{release}
Summary: QEMU is a machine emulator and virtualizer
Name: qemu-kvm
Version: 6.2.0
Release: 11%{?rcrel}%{?dist}
Release: 11%{?rcrel}%{?dist}.2
# Epoch because we pushed a qemu-1.0 package. AIUI this can't ever be dropped
Epoch: 15
License: GPLv2 and GPLv2+ and CC-BY
@ -242,6 +242,32 @@ Patch70: kvm-tests-acpi-update-expected-blobs.patch
Patch71: kvm-tests-acpi-test-short-OEM_ID-OEM_TABLE_ID-values-in-.patch
# For bz#1975840 - Windows guest hangs after updating and restarting from the guest OS
Patch72: kvm-target-i386-properly-reset-TSC-on-reset.patch
# For bz#2071103 - RHEL 9.0 guest with vsock device migration failed from RHEL 9.0 > RHEL 8.6 [rhel-8.6.0.z]
Patch73: kvm-RHEL-disable-seqpacket-for-vhost-vsock-device-in-rhe.patch
# For bz#2075686 - CVE-2021-3750 virt:rhel/qemu-kvm: QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free [rhel-8] [rhel-8.6.0.z]
Patch74: kvm-hw-intc-arm_gicv3-Check-for-MEMTX_OK-instead-of-MEMT.patch
# For bz#2075686 - CVE-2021-3750 virt:rhel/qemu-kvm: QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free [rhel-8] [rhel-8.6.0.z]
Patch75: kvm-softmmu-physmem-Simplify-flatview_write-and-address_.patch
# For bz#2075686 - CVE-2021-3750 virt:rhel/qemu-kvm: QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free [rhel-8] [rhel-8.6.0.z]
Patch76: kvm-softmmu-physmem-Introduce-MemTxAttrs-memory-field-an.patch
# For bz#2075683 - CVE-2021-4207 virt:rhel/qemu-kvm: QEMU: QXL: double fetch in qxl_cursor() can lead to heap buffer overflow [rhel-8] [rhel-8.6.0.z]
Patch77: kvm-display-qxl-render-fix-race-condition-in-qxl_cursor-.patch
# For bz#2075637 - CVE-2022-26353 virt:rhel/qemu-kvm: QEMU: virtio-net: map leaking on error during receive [rhel-8] [rhel-8.6.0.z]
Patch78: kvm-virtio-net-fix-map-leaking-on-error-during-receive.patch
# For bz#2075639 - CVE-2022-26354 virt:rhel/qemu-kvm: QEMU: vhost-vsock: missing virtqueue detach on error can lead to memory leak [rhel-8] [rhel-8.6.0.z]
Patch79: kvm-vhost-vsock-detach-the-virqueue-element-in-case-of-e.patch
# For bz#2072242 - Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) [rhel-8.6.0.z]
Patch80: kvm-qcow2-Improve-refcount-structure-rebuilding.patch
# For bz#2072242 - Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) [rhel-8.6.0.z]
Patch81: kvm-iotests-108-Test-new-refcount-rebuild-algorithm.patch
# For bz#2072242 - Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) [rhel-8.6.0.z]
Patch82: kvm-qcow2-Add-errp-to-rebuild_refcount_structure.patch
# For bz#2072242 - Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) [rhel-8.6.0.z]
Patch83: kvm-iotests-108-Fix-when-missing-user_allow_other.patch
# For bz#2077928 - Remove upstream-only devices from the qemu-kvm binary [rhel-8.6.0.z]
Patch84: kvm-Revert-redhat-Add-some-devices-for-exporting-upstrea.patch
# For bz#2082622 - CVE-2021-4206 virt:rhel/qemu-kvm: QEMU: QXL: integer overflow in cursor_alloc() can lead to heap buffer overflow [rhel-8.6.0.z]
Patch85: kvm-ui-cursor-fix-integer-overflow-in-cursor_alloc-CVE-2.patch
BuildRequires: wget
@ -1411,6 +1437,39 @@ sh %{_sysconfdir}/sysconfig/modules/kvm.modules &> /dev/null || :
%changelog
* Wed Jun 15 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-11.el8_6.2
- kvm-Revert-redhat-Add-some-devices-for-exporting-upstrea.patch [bz#2077928]
- kvm-ui-cursor-fix-integer-overflow-in-cursor_alloc-CVE-2.patch [bz#2082622]
- Resolves: bz#2077928
(Remove upstream-only devices from the qemu-kvm binary [rhel-8.6.0.z])
- Resolves: bz#2082622
(CVE-2021-4206 virt:rhel/qemu-kvm: QEMU: QXL: integer overflow in cursor_alloc() can lead to heap buffer overflow [rhel-8.6.0.z])
* Wed May 25 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-11.el8_6.1
- kvm-RHEL-disable-seqpacket-for-vhost-vsock-device-in-rhe.patch [bz#2071103]
- kvm-hw-intc-arm_gicv3-Check-for-MEMTX_OK-instead-of-MEMT.patch [bz#2075686]
- kvm-softmmu-physmem-Simplify-flatview_write-and-address_.patch [bz#2075686]
- kvm-softmmu-physmem-Introduce-MemTxAttrs-memory-field-an.patch [bz#2075686]
- kvm-display-qxl-render-fix-race-condition-in-qxl_cursor-.patch [bz#2075683]
- kvm-virtio-net-fix-map-leaking-on-error-during-receive.patch [bz#2075637]
- kvm-vhost-vsock-detach-the-virqueue-element-in-case-of-e.patch [bz#2075639]
- kvm-qcow2-Improve-refcount-structure-rebuilding.patch [bz#2072242]
- kvm-iotests-108-Test-new-refcount-rebuild-algorithm.patch [bz#2072242]
- kvm-qcow2-Add-errp-to-rebuild_refcount_structure.patch [bz#2072242]
- kvm-iotests-108-Fix-when-missing-user_allow_other.patch [bz#2072242]
- Resolves: bz#2071103
(RHEL 9.0 guest with vsock device migration failed from RHEL 9.0 > RHEL 8.6 [rhel-8.6.0.z])
- Resolves: bz#2075686
(CVE-2021-3750 virt:rhel/qemu-kvm: QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free [rhel-8] [rhel-8.6.0.z])
- Resolves: bz#2075683
(CVE-2021-4207 virt:rhel/qemu-kvm: QEMU: QXL: double fetch in qxl_cursor() can lead to heap buffer overflow [rhel-8] [rhel-8.6.0.z])
- Resolves: bz#2075637
(CVE-2022-26353 virt:rhel/qemu-kvm: QEMU: virtio-net: map leaking on error during receive [rhel-8] [rhel-8.6.0.z])
- Resolves: bz#2075639
(CVE-2022-26354 virt:rhel/qemu-kvm: QEMU: vhost-vsock: missing virtqueue detach on error can lead to memory leak [rhel-8] [rhel-8.6.0.z])
- Resolves: bz#2072242
(Fail to rebuild the reference count tables of qcow2 image on host block devices (e.g. LVs) [rhel-8.6.0.z])
* Tue Apr 05 2022 Jon Maloy <jmaloy@redhat.com> - 6.2.0-11
- kvm-target-i386-properly-reset-TSC-on-reset.patch [bz#1975840]
- Resolves: bz#1975840