From: "Alexey V. Vissarionov" gremlin@altlinux.org

mainline inclusion from mainline-v6.3-rc1 commit ea0b5aa5f184cf8293c93163f0fb00505190d431 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I9JNPZ CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

------------------------------------------------------

The sysfs link name "virtfn%u" constructed by pci_iov_sysfs_link() requires 17 bytes to contain the longest possible string. Increase VIRTFN_ID_LEN to accommodate that.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[bhelgaas: commit log, comment at #define] Fixes: dd7cc44d0bce ("PCI: add SR-IOV API for Physical Function driver") Link: https://lore.kernel.org/r/20221218033347.23743-1-gremlin@altlinux.org Signed-off-by: Alexey V. Vissarionov gremlin@altlinux.org Signed-off-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: liwei liwei728@huawei.com --- drivers/pci/iov.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 7006413aa0a3..c1ca66eda86e 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -14,7 +14,7 @@ #include <linux/delay.h> #include "pci.h"

-#define VIRTFN_ID_LEN 16 +#define VIRTFN_ID_LEN 17 /* "virtfn%u\0" for 2^32 - 1 */

static DEFINE_MUTEX(pci_sriov_numvfs_lock);