From ece841abbed2da71fa10710c687c9ce9efb6bf69 Mon Sep 17 00:00:00 2001 From: Justin Tee Date: Thu, 5 Dec 2019 10:09:01 +0800 Subject: 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 Signed-off-by Justin Tee Add commit log, and simplify/fix the original patch wroten by Justin. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe --- block/bio-integrity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'block/bio-integrity.c') diff --git a/block/bio-integrity.c b/block/bio-integrity.c index fb95dbb21dd8..bf62c25cde8f 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -87,7 +87,7 @@ EXPORT_SYMBOL(bio_integrity_alloc); * Description: Used to free the integrity portion of a bio. Usually * called from bio_free(). */ -static void bio_integrity_free(struct bio *bio) +void bio_integrity_free(struct bio *bio) { struct bio_integrity_payload *bip = bio_integrity(bio); struct bio_set *bs = bio->bi_pool; -- cgit v1.2.3