From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Ming Lei <ming.lei@redhat.com>,
Christoph Hellwig <hch@lst.de>,
Johannes Thumshirn <johannes.thumshirn@wdc.com>,
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
Damien Le Moal <damien.lemoal@wdc.com>
Subject: [PATCH] block: fix memory leak of bvec
Date: Tue, 2 Feb 2021 23:54:10 +0800 [thread overview]
Message-ID: <20210202155410.875745-1-ming.lei@redhat.com> (raw)
bio_init() clears bio instance, so the bvec index has to be set after
bio_init(), otherwise bio->bi_io_vec may be leaked.
Fixes: 3175199ab0ac ("block: split bio_kmalloc from bio_alloc_bioset")
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
block/bio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/bio.c b/block/bio.c
index d4375619348c..757fee46cefc 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -482,8 +482,8 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, unsigned int nr_iovecs,
if (unlikely(!bvl))
goto err_free;
- bio->bi_flags |= idx << BVEC_POOL_OFFSET;
bio_init(bio, bvl, bvec_nr_vecs(idx));
+ bio->bi_flags |= idx << BVEC_POOL_OFFSET;
} else if (nr_iovecs) {
bio_init(bio, bio->bi_inline_vecs, BIO_INLINE_VECS);
} else {
--
2.29.2
next reply other threads:[~2021-02-02 15:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 15:54 Ming Lei [this message]
2021-02-02 15:55 ` [PATCH] block: fix memory leak of bvec Christoph Hellwig
2021-02-02 15:58 ` Jens Axboe
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