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dm-verity: fix dm_is_verity_target() when dm-verity is builtin

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commit 3708c72695 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: b6c1c5745c ("dm: Add verity helpers for LoadPin")
Cc: stable@vger.kernel.org
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Biggers 2024-07-04 16:09:57 +02:00 committed by Greg Kroah-Hartman
parent 47e85f7121
commit dcb5620d2d
1 changed files with 8 additions and 8 deletions
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16
drivers/md/dm-verity-target.c
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@ -1511,14 +1511,6 @@ bad:
return r;
}
/*
* 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.
*
@ -1572,6 +1564,14 @@ 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@redhat.com>");
MODULE_AUTHOR("Mandeep Baines <msb@chromium.org>");
MODULE_AUTHOR("Will Drewry <wad@chromium.org>");