77 lines
2.7 KiB
Diff
77 lines
2.7 KiB
Diff
From fcd6219a95851d17fd8bde69d87e78c6533be990 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
|
|
Date: Wed, 12 Jul 2023 17:46:57 +0200
|
|
Subject: [PATCH 24/37] hw/vfio/pci-quirks: Sanitize capability pointer
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Cédric Le Goater <clg@redhat.com>
|
|
RH-MergeRequest: 179: vfio: live migration support
|
|
RH-Bugzilla: 2192818
|
|
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
|
|
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
RH-Commit: [22/28] cb080409c1912f4365f8e31cd23c914b48f91575 (clegoate/qemu-kvm-c9s)
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/2192818
|
|
|
|
commit 0ddcb39c9357
|
|
Author: Alex Williamson <alex.williamson@redhat.com>
|
|
Date: Fri Jun 30 16:36:08 2023 -0600
|
|
|
|
hw/vfio/pci-quirks: Sanitize capability pointer
|
|
|
|
Coverity reports a tained scalar when traversing the capabilities
|
|
chain (CID 1516589). In practice I've never seen a device with a
|
|
chain so broken as to cause an issue, but it's also pretty easy to
|
|
sanitize.
|
|
|
|
Fixes: f6b30c1984f7 ("hw/vfio/pci-quirks: Support alternate offset for GPUDirect Cliques")
|
|
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
|
|
Reviewed-by: Cédric Le Goater <clg@redhat.com>
|
|
Signed-off-by: Cédric Le Goater <clg@redhat.com>
|
|
|
|
Signed-off-by: Cédric Le Goater <clg@redhat.com>
|
|
---
|
|
hw/vfio/pci-quirks.c | 10 ++++++++--
|
|
1 file changed, 8 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
|
|
index 0ed2fcd531..f4ff836805 100644
|
|
--- a/hw/vfio/pci-quirks.c
|
|
+++ b/hw/vfio/pci-quirks.c
|
|
@@ -1530,6 +1530,12 @@ const PropertyInfo qdev_prop_nv_gpudirect_clique = {
|
|
.set = set_nv_gpudirect_clique_id,
|
|
};
|
|
|
|
+static bool is_valid_std_cap_offset(uint8_t pos)
|
|
+{
|
|
+ return (pos >= PCI_STD_HEADER_SIZEOF &&
|
|
+ pos <= (PCI_CFG_SPACE_SIZE - PCI_CAP_SIZEOF));
|
|
+}
|
|
+
|
|
static int vfio_add_nv_gpudirect_cap(VFIOPCIDevice *vdev, Error **errp)
|
|
{
|
|
PCIDevice *pdev = &vdev->pdev;
|
|
@@ -1563,7 +1569,7 @@ static int vfio_add_nv_gpudirect_cap(VFIOPCIDevice *vdev, Error **errp)
|
|
*/
|
|
ret = pread(vdev->vbasedev.fd, &tmp, 1,
|
|
vdev->config_offset + PCI_CAPABILITY_LIST);
|
|
- if (ret != 1 || !tmp) {
|
|
+ if (ret != 1 || !is_valid_std_cap_offset(tmp)) {
|
|
error_setg(errp, "NVIDIA GPUDirect Clique ID: error getting cap list");
|
|
return -EINVAL;
|
|
}
|
|
@@ -1575,7 +1581,7 @@ static int vfio_add_nv_gpudirect_cap(VFIOPCIDevice *vdev, Error **errp)
|
|
d4_conflict = true;
|
|
}
|
|
tmp = pdev->config[tmp + PCI_CAP_LIST_NEXT];
|
|
- } while (tmp);
|
|
+ } while (is_valid_std_cap_offset(tmp));
|
|
|
|
if (!c8_conflict) {
|
|
pos = 0xC8;
|
|
--
|
|
2.39.3
|
|
|