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bcachefs: Fix a memory leak in dio write path

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Commit c42bca92be928ce7dece5fc04cf68d0e37ee6718 "bio: don't copy bvec
for direct IO" changed bio_iov_iter_get_pages() to point bio->bi_iovec
at the incoming biovec, meaning if we already allocated one, it'll be
leaked.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-06-14 14:47:26 -04:00 committed by Kent Overstreet
parent 120f63e321
commit 2ed5cd508d
1 changed files with 3 additions and 1 deletions
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4
fs/bcachefs/fs-io.c
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@ -2025,7 +2025,9 @@ ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter)
}
bio = bio_alloc_bioset(NULL,
iov_iter_npages(iter, BIO_MAX_VECS),
iov_iter_is_bvec(iter)
? 0
: iov_iter_npages(iter, BIO_MAX_VECS),
REQ_OP_WRITE,
GFP_KERNEL,
&c->dio_write_bioset);