Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 24/30] dm verity: set DM_TARGET_IMMUTABLE feature flag | Date | Fri, 3 Jun 2022 19:39:52 +0200 |
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From: Sarthak Kukreti <sarthakkukreti@google.com>
commit 4caae58406f8ceb741603eee460d79bacca9b1b5 upstream.
The device-mapper framework provides a mechanism to mark targets as immutable (and hence fail table reloads that try to change the target type). Add the DM_TARGET_IMMUTABLE flag to the dm-verity target's feature flags to prevent switching the verity target with a different target type.
Fixes: a4ffc152198e ("dm: add verity target") Cc: stable@vger.kernel.org Signed-off-by: Sarthak Kukreti <sarthakkukreti@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Mike Snitzer <snitzer@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/md/dm-verity-target.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -1176,6 +1176,7 @@ bad: static struct target_type verity_target = { .name = "verity", + .features = DM_TARGET_IMMUTABLE, .version = {1, 4, 0}, .module = THIS_MODULE, .ctr = verity_ctr,
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