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(parent: 854fbb9) | patch
blk-mq: fix double-free in error path
authorTony Battersby <tonyb@cybernetics.com>
Wed, 11 Feb 2015 16:32:30 +0000 (11:32 -0500)
committerJens Axboe <axboe@fb.com>
Wed, 11 Feb 2015 16:35:21 +0000 (09:35 -0700)
commit564e559f2baf6a868768d0cac286980b3cfd6e30
treec05956de6d4221f4ce5935902cab4598e7d3a171tree | snapshot (tar.gz zip)
parent854fbb9c699e34fe4889e6907c4fc73889192223commit | diff
blk-mq: fix double-free in error path

If the allocation of bt->bs fails, then bt->map can be freed twice, once
in blk_mq_init_bitmap_tags() -> bt_alloc(), and once in
blk_mq_init_bitmap_tags() -> bt_free().  Fix by setting the pointer to
NULL after the first free.

Cc: <stable@vger.kernel.org>
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
block/blk-mq-tag.c diff | blob | blame | history