dm integrity: fix a crash if "recalculate" used without "internal_hash"
Recalculate can only be specified with internal_hash.
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 81df019..cce203a 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -4235,6 +4235,12 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
r = -ENOMEM;
goto bad;
}
+ } else {
+ if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {
+ ti->error = "Recalculate can only be specified with internal_hash";
+ r = -EINVAL;
+ goto bad;
+ }
}
ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev,