6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Fedor Pchelkin <pchelkin@xxxxxxxxx>
commit 9850ccd5dd88075b2b7fd28d96299d5535f58cc5 upstream.
Commit 4dba12881f88 ("dm zoned: support arbitrary number of devices")
made the pointers to additional zoned devices to be stored in a
dynamically allocated dmz->ddev array. However, this array is not freed.
Rename dmz_put_zoned_device to dmz_put_zoned_devices and fix it to
free the dmz->ddev array when cleaning up zoned device information.
Remove NULL assignment for all dmz->ddev elements and just free the
dmz->ddev array instead.
Found by Linux Verification Center (linuxtesting.org).
Fixes: 4dba12881f88 ("dm zoned: support arbitrary number of devices")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Fedor Pchelkin <pchelkin@xxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-zoned-target.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -748,17 +748,16 @@ err:
/*
* Cleanup zoned device information.
*/
-static void dmz_put_zoned_device(struct dm_target *ti)
+static void dmz_put_zoned_devices(struct dm_target *ti)
{
struct dmz_target *dmz = ti->private;
int i;
- for (i = 0; i < dmz->nr_ddevs; i++) {
- if (dmz->ddev[i]) {
+ for (i = 0; i < dmz->nr_ddevs; i++)
+ if (dmz->ddev[i])
dm_put_device(ti, dmz->ddev[i]);
- dmz->ddev[i] = NULL;
- }
- }
+
+ kfree(dmz->ddev);
}
static int dmz_fixup_devices(struct dm_target *ti)
@@ -948,7 +947,7 @@ err_bio:
err_meta:
dmz_dtr_metadata(dmz->metadata);
err_dev:
- dmz_put_zoned_device(ti);
+ dmz_put_zoned_devices(ti);
err:
kfree(dmz->dev);
kfree(dmz);
@@ -978,7 +977,7 @@ static void dmz_dtr(struct dm_target *ti
bioset_exit(&dmz->bio_set);
- dmz_put_zoned_device(ti);
+ dmz_put_zoned_devices(ti);
mutex_destroy(&dmz->chunk_lock);
