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| author |   Justin Tee <justin.tee@broadcom.com> | 2019-12-05 10:09:01 +0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-12-05 11:38:36 -0700 |
| commit | ece841abbed2da71fa10710c687c9ce9efb6bf69 (patch) | |
| tree | 76f3d630387629bd6dcfa77163aa3aa94503cc07 /block/blk.h | |
| parent | bfq-iosched: Ensure bio->bi_blkg is valid before using it (diff) | |
| download | linux-dev-ece841abbed2da71fa10710c687c9ce9efb6bf69.tar.xz linux-dev-ece841abbed2da71fa10710c687c9ce9efb6bf69.zip | |
block: fix memleak of bio integrity data
7c20f11680a4 ("bio-integrity: stop abusing bi_end_io") moves
bio_integrity_free from bio_uninit() to bio_integrity_verify_fn()
and bio_endio(). This way looks wrong because bio may be freed
without calling bio_endio(), for example, blk_rq_unprep_clone() is
called from dm_mq_queue_rq() when the underlying queue of dm-mpath
is busy.
So memory leak of bio integrity data is caused by commit 7c20f11680a4.
Fixes this issue by re-adding bio_integrity_free() to bio_uninit().
Fixes: 7c20f11680a4 ("bio-integrity: stop abusing bi_end_io")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by Justin Tee <justin.tee@broadcom.com>
Add commit log, and simplify/fix the original patch wroten by Justin.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to '')
| -rw-r--r-- | block/blk.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h index 2bea40180b6f..6842f28c033e 100644 --- a/block/blk.h +++ b/block/blk.h @@ -121,6 +121,7 @@ static inline void blk_rq_bio_prep(struct request *rq, struct bio *bio, #ifdef CONFIG_BLK_DEV_INTEGRITY void blk_flush_integrity(void); bool __bio_integrity_endio(struct bio *); +void bio_integrity_free(struct bio *bio); static inline bool bio_integrity_endio(struct bio *bio) { if (bio_integrity(bio)) @@ -166,6 +167,9 @@ static inline bool bio_integrity_endio(struct bio *bio) { return true; } +static inline void bio_integrity_free(struct bio *bio) +{ +} #endif /* CONFIG_BLK_DEV_INTEGRITY */ unsigned long blk_rq_timeout(unsigned long timeout); |