fc2ddd6b1c
- kvm-memory-prevent-dma-reentracy-issues.patch [bz#1999236] - kvm-async-Add-an-optional-reentrancy-guard-to-the-BH-API.patch [bz#1999236] - kvm-checkpatch-add-qemu_bh_new-aio_bh_new-checks.patch [bz#1999236] - kvm-hw-replace-most-qemu_bh_new-calls-with-qemu_bh_new_g.patch [bz#1999236] - kvm-lsi53c895a-disable-reentrancy-detection-for-script-R.patch [bz#1999236] - kvm-bcm2835_property-disable-reentrancy-detection-for-io.patch [bz#1999236] - kvm-raven-disable-reentrancy-detection-for-iomem.patch [bz#1999236] - kvm-apic-disable-reentrancy-detection-for-apic-msi.patch [bz#1999236] - kvm-async-avoid-use-after-free-on-re-entrancy-guard.patch [bz#1999236] - kvm-memory-stricter-checks-prior-to-unsetting-engaged_in.patch [bz#1999236] - kvm-lsi53c895a-disable-reentrancy-detection-for-MMIO-reg.patch [bz#1999236] - kvm-hw-scsi-lsi53c895a-Fix-reentrancy-issues-in-the-LSI-.patch [bz#1999236] - kvm-target-i386-add-support-for-FLUSH_L1D-feature.patch [bz#2216203] - kvm-target-i386-add-support-for-FB_CLEAR-feature.patch [bz#2216203] - kvm-migration-Disable-postcopy-multifd-migration.patch [bz#2169733] - Resolves: bz#1999236 (CVE-2021-3750 virt:rhel/qemu-kvm: QEMU: hcd-ehci: DMA reentrancy issue leads to use-after-free [rhel-8]) - Resolves: bz#2216203 ([qemu-kvm]VM reports vulnerabilty to mmio_stale_data on patched host with microcode) - Resolves: bz#2169733 (Qemu on destination host crashed if migrate with postcopy and multifd enabled)
60 lines
2.1 KiB
Diff
60 lines
2.1 KiB
Diff
From 3cffdbf3224ac21016dbee69cb2382c322d4bfbb Mon Sep 17 00:00:00 2001
|
|
From: Jon Maloy <jmaloy@redhat.com>
|
|
Date: Tue, 9 May 2023 10:29:03 -0400
|
|
Subject: [PATCH 05/15] lsi53c895a: disable reentrancy detection for script RAM
|
|
|
|
RH-Author: Jon Maloy <jmaloy@redhat.com>
|
|
RH-MergeRequest: 277: memory: prevent dma-reentracy issues
|
|
RH-Bugzilla: 1999236
|
|
RH-Acked-by: Thomas Huth <thuth@redhat.com>
|
|
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
RH-Commit: [5/12] b5334c3a34b38ed1dccf0030d5704e51e00fdce3 (redhat/rhel/src/qemu-kvm/jons-qemu-kvm-2)
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1999236
|
|
Upstream: Merged
|
|
CVE: CVE-2021-3750
|
|
|
|
commit bfd6e7ae6a72b84e2eb9574f56e6ec037f05182c
|
|
Author: Alexander Bulekov <alxndr@bu.edu>
|
|
Date: Thu Apr 27 17:10:10 2023 -0400
|
|
|
|
lsi53c895a: disable reentrancy detection for script RAM
|
|
|
|
As the code is designed to use the memory APIs to access the script ram,
|
|
disable reentrancy checks for the pseudo-RAM ram_io MemoryRegion.
|
|
|
|
In the future, ram_io may be converted from an IO to a proper RAM MemoryRegion.
|
|
|
|
Reported-by: Fiona Ebner <f.ebner@proxmox.com>
|
|
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
|
|
Reviewed-by: Thomas Huth <thuth@redhat.com>
|
|
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
|
|
Message-Id: <20230427211013.2994127-6-alxndr@bu.edu>
|
|
Signed-off-by: Thomas Huth <thuth@redhat.com>
|
|
|
|
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
|
|
---
|
|
hw/scsi/lsi53c895a.c | 6 ++++++
|
|
1 file changed, 6 insertions(+)
|
|
|
|
diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
|
|
index 85e907a785..1e15e13fbf 100644
|
|
--- a/hw/scsi/lsi53c895a.c
|
|
+++ b/hw/scsi/lsi53c895a.c
|
|
@@ -2301,6 +2301,12 @@ static void lsi_scsi_realize(PCIDevice *dev, Error **errp)
|
|
memory_region_init_io(&s->io_io, OBJECT(s), &lsi_io_ops, s,
|
|
"lsi-io", 256);
|
|
|
|
+ /*
|
|
+ * Since we use the address-space API to interact with ram_io, disable the
|
|
+ * re-entrancy guard.
|
|
+ */
|
|
+ s->ram_io.disable_reentrancy_guard = true;
|
|
+
|
|
address_space_init(&s->pci_io_as, pci_address_space_io(dev), "lsi-pci-io");
|
|
qdev_init_gpio_out(d, &s->ext_irq, 1);
|
|
|
|
--
|
|
2.37.3
|
|
|