From: Eric Biggers <ebiggers@xxxxxxxxxx>
commit 3708c7269593b836b1d684214cd9f5d83e4ed3fd upstream.
When CONFIG_DM_VERITY=y, dm_is_verity_target() returned true for any
builtin dm target, not just dm-verity. Fix this by checking for
verity_target instead of THIS_MODULE (which is NULL for builtin code).
Fixes: b6c1c5745ccc ("dm: Add verity helpers for LoadPin")
Cc: stable@xxxxxxxxxxxxxxx
Cc: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-verity-target.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -1539,14 +1539,6 @@ bad:
}
/*
- * Check whether a DM target is a verity target.
- */
-bool dm_is_verity_target(struct dm_target *ti)
-{
- return ti->type->module == THIS_MODULE;
-}
-
-/*
* Get the verity mode (error behavior) of a verity target.
*
* Returns the verity mode of the target, or -EINVAL if 'ti' is not a verity
@@ -1599,6 +1591,14 @@ static struct target_type verity_target
};
module_dm(verity);
+/*
+ * Check whether a DM target is a verity target.
+ */
+bool dm_is_verity_target(struct dm_target *ti)
+{
+ return ti->type == &verity_target;
+}
+
MODULE_AUTHOR("Mikulas Patocka <mpatocka@xxxxxxxxxx>");
MODULE_AUTHOR("Mandeep Baines <msb@xxxxxxxxxxxx>");
MODULE_AUTHOR("Will Drewry <wad@xxxxxxxxxxxx>");
Patches currently in stable-queue which might be from ebiggers@xxxxxxxxxx are
queue-6.10/dm-verity-fix-dm_is_verity_target-when-dm-verity-is-builtin.patch
