diff options
| author | Matthias Kaehlcke <mka@chromium.org> | 2023-06-27 20:28:01 +0000 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2023-06-28 10:43:04 -0700 |
| commit | 47f04616f2c9b2f4f0c9127e30ca515a078db591 (patch) | |
| tree | 38d5c85b306d29dba0828d2d1ea1bce9c8169354 | |
| parent | acf15e07eb06507c69f92394c36052677029b0a8 (diff) | |
dm: verity-loadpin: Add NULL pointer check for 'bdev' parameter
Add a NULL check for the 'bdev' parameter of
dm_verity_loadpin_is_bdev_trusted(). The function is called
by loadpin_check(), which passes the block device that
corresponds to the super block of the file system from which
a file is being loaded. Generally a super_block structure has
an associated block device, however that is not always the
case (e.g. tmpfs).
Cc: stable@vger.kernel.org # v6.0+
Fixes: b6c1c5745ccc ("dm: Add verity helpers for LoadPin")
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20230627202800.1.Id63f7f59536d20f1ab83e1abdc1fda1471c7d031@changeid
Signed-off-by: Kees Cook <keescook@chromium.org>
| -rw-r--r-- | drivers/md/dm-verity-loadpin.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/dm-verity-loadpin.c b/drivers/md/dm-verity-loadpin.c index 4f78cc55c251..0666699b6858 100644 --- a/drivers/md/dm-verity-loadpin.c +++ b/drivers/md/dm-verity-loadpin.c @@ -58,6 +58,9 @@ bool dm_verity_loadpin_is_bdev_trusted(struct block_device *bdev) int srcu_idx; bool trusted = false; + if (bdev == NULL) + return false; + if (list_empty(&dm_verity_loadpin_trusted_root_digests)) return false; |