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vfio/pci: Fix buffer overrun when writing the VF token 

qemu_uuid_unparse() includes a trailing NUL when writing the uuid
string and the buffer size should be UUID_FMT_LEN + 1 bytes. Use the
recently added UUID_STR_LEN which defines the correct size.

Fixes: CID 1522913
Fixes: 2dca1b37a7 ("vfio/pci: add support for VF token")
Cc: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: "Denis V. Lunev" <den@openvz.org>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Cédric Le Goater 2023-10-26 09:06:35 +02:00
parent 721da0396c
commit f8d6f3b16c
1 changed files with 1 additions and 1 deletions
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hw/vfio/pci.c
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@ -3081,7 +3081,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
struct stat st;
int i, ret;
bool is_mdev;
char uuid[UUID_FMT_LEN];
char uuid[UUID_STR_LEN];
char *name;
if (!vbasedev->sysfsdev) {