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| author | Jens Axboe <jaxboe@fusionio.com> | 2010-10-23 20:40:26 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-10-23 20:40:26 +0200 |
| commit | 7ad58c028652753814054f4e3ac58f925e7343f4 (patch) | |
| tree | 2e3bc1c5e3c98078b970483cd49a49d7c1ae0dcf /block/blk-core.c | |
| parent | 7f3883962870dd28b5f2322ac44a9d03640ef448 (diff) | |
| download | linux-7ad58c028652753814054f4e3ac58f925e7343f4.tar.gz | |
block: fix use-after-free bug in blk throttle code
blk_throtl_exit() frees the throttle data hanging off the queue in blk_cleanup_queue(), but blk_put_queue() will indirectly dereference this data when calling blk_sync_queue() which in turns calls throtl_shutdown_timer_wq(). Fix this by moving the freeing of the throttle data to when the queue is truly being released, and post the call to blk_sync_queue(). Reported-by: Ingo Molnar <mingo@elte.hu> Tested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 45141469e89e..51efd835d4cf 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -462,8 +462,6 @@ void blk_cleanup_queue(struct request_queue *q) if (q->elevator) elevator_exit(q->elevator); - blk_throtl_exit(q); - blk_put_queue(q); } EXPORT_SYMBOL(blk_cleanup_queue); |