[PATCH v2 2/3] vfio/pci: Fix buffer overrun when writing the VF token

["Cédric Le Goater" <clg@redhat.com>]

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: 2dca1b37a760 ("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>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/vfio/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 9bfa83aca1a87952e18743c9ca951b1bfc873507..c02a5d70f5e1b8e4d22051285748f514f1b9f008 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3274,7 +3274,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
     Error *err = NULL;
     int i, ret;
     bool is_mdev;
-    char uuid[UUID_FMT_LEN];
+    char uuid[UUID_STR_LEN];
     char *name;
 
     if (vbasedev->fd < 0 && !vbasedev->sysfsdev) {
-- 
2.41.0