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| author | Ming Lei <ming.lei@redhat.com> | 2019-04-24 14:01:46 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-04-24 17:06:04 +0300 |
| commit | 0257c0ed5ea3de3e32cb322852c4c40bc09d1b97 (patch) | |
| tree | aa72c195716985cd0c83e50308a5212c1c57307a /block/bio.c | |
| parent | 551879a48f01826fd86568d7bd1e774cb0de3295 (diff) | |
| download | linux-0257c0ed5ea3de3e32cb322852c4c40bc09d1b97.tar.xz | |
block: don't run get_page() on pages from non-bvec iov iter
The refcount has been increased for pages retrieved from non-bvec iov iter
via __bio_iov_iter_get_pages(), so don't need to do that again.
Otherwise, IO pages are leaked easily.
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Fixes: 7321ecbfc7cf ("block: change how we get page references in bio_iov_iter_get_pages")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/bio.c b/block/bio.c index c81ed2dfee53..662d45752ec5 100644 --- a/block/bio.c +++ b/block/bio.c @@ -992,7 +992,7 @@ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) if (iov_iter_bvec_no_ref(iter)) bio_set_flag(bio, BIO_NO_PAGE_REF); - else + else if (is_bvec) bio_get_pages(bio); return bio->bi_vcnt ? 0 : ret; |