linux/drivers/md/dm-thin.c
Mikulas Patocka ffcc89dbcb dm thin: fix a race in thin_dtr
commit 17181fb7a0 upstream.

As long as struct thin_c is in the list, anyone can grab a reference of
it.  Consequently, we must wait for the reference count to drop to zero
*after* we remove the structure from the list, not before.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-08 10:30:19 -08:00

3647 lines
90 KiB