dm integrity: fix invalid table returned due to argument count mismatch

If the flag SB_FLAG_RECALCULATE is present in the superblock, but it was
not specified on the command line (i.e. ic->recalculate_flag is false),
dm-integrity would return invalid table line - the reported number of
arguments would not match the real number.

Fixes: 468dfca38b1a ("dm integrity: add a bitmap mode")
Cc: stable@vger.kernel.org # v5.2+
Reported-by: Ondrej Kozina <okozina@redhat.com>
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 6b6c3e1..2f98e88 100644 (file)
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2975,7 +2975,7 @@ static void dm_integrity_status(struct dm_target *ti, status_type_t type,
                        DMEMIT(" meta_device:%s", ic->meta_dev->name);
                if (ic->sectors_per_block != 1)
                        DMEMIT(" block_size:%u", ic->sectors_per_block << SECTOR_SHIFT);
-               if (ic->recalculate_flag)
+               if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING))
                        DMEMIT(" recalculate");
                DMEMIT(" journal_sectors:%u", ic->initial_sectors - SB_SECTORS);
                DMEMIT(" interleave_sectors:%u", 1U << ic->sb->log2_interleave_sectors);