dm verity: fix DM_VERITY_OPTS_MAX value

commit 160f99db943224e55906dd83880da1a704c6e6b9 upstream.

Three optional parameters must be accepted at once in a DM verity table, e.g.:
  (verity_error_handling_mode) (ignore_zero_block) (check_at_most_once)
Fix this to be possible by incrementing DM_VERITY_OPTS_MAX.

Signed-off-by: JeongHyeon Lee <jhs2.lee@samsung.com>
Fixes: 843f38d382b1 ("dm verity: add 'check_at_most_once' option to only validate hashes once")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index 6b8e5bd..808a98e 100644 (file)
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -34,7 +34,7 @@
 #define DM_VERITY_OPT_IGN_ZEROES       "ignore_zero_blocks"
 #define DM_VERITY_OPT_AT_MOST_ONCE     "check_at_most_once"
 
-#define DM_VERITY_OPTS_MAX             (2 + DM_VERITY_OPTS_FEC + \
+#define DM_VERITY_OPTS_MAX             (3 + DM_VERITY_OPTS_FEC + \
                                         DM_VERITY_ROOT_HASH_VERIFICATION_OPTS)
 
 static unsigned dm_verity_prefetch_cluster = DM_VERITY_DEFAULT_PREFETCH_SIZE;