Commit 0d5e34c1 authored Aug 19, 2019 by Dan Carpenter Committed by Greg Kroah-Hartman Aug 29, 2019

dm zoned: fix potential NULL dereference in dmz_do_reclaim()



[ Upstream commit e0702d90b79d430b0ccc276ead4f88440bb51352 ]

This function is supposed to return error pointers so it matches the
dmz_get_rnd_zone_for_reclaim() function.  The current code could lead to
a NULL dereference in dmz_do_reclaim()

Fixes: b234c6d7a703 ("dm zoned: improve error handling in reclaim")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 655bb2c4

drivers/md/dm-zoned-metadata.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1579,7 +1579,7 @@ static struct dm_zone dmz_get_seq_zone_for_reclaim(struct dmz_metadata zmd)
		struct dm_zone *zone;

		if (list_empty(&zmd->map_seq_list))
		return NULL;
		return ERR_PTR(-EBUSY);

		list_for_each_entry(zone, &zmd->map_seq_list, link) {
		if (!zone->bzone)
		@@ -1588,7 +1588,7 @@ static struct dm_zone dmz_get_seq_zone_for_reclaim(struct dmz_metadata zmd)
		return zone;
		}

		return NULL;
		return ERR_PTR(-EBUSY);
		}

		/*