tree 38d5c85b306d29dba0828d2d1ea1bce9c8169354
parent acf15e07eb06507c69f92394c36052677029b0a8
author Matthias Kaehlcke <mka@chromium.org> 1687897681 +0000
committer Kees Cook <keescook@chromium.org> 1687974184 -0700

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>