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NFS: Fix a page leak in nfs_destroy_unlinked_subrequests()

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commit add42de31721fa29ed77a7ce388674d69f9d31a4 upstream.

When we detach a subrequest from the list, we must also release the
reference it holds to the parent.

Fixes: 5b2b5187fa ("NFS: Fix nfs_page_group_destroy() and nfs_lock_and_join_requests() race cases")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Trond Myklebust 2020-04-01 10:07:16 -04:00 • committed by Greg Kroah-Hartman
commit 699d2c4d66
1 changed files with 1 additions and 0 deletions
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1
fs/nfs/write.c
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@ -441,6 +441,7 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list,
}
subreq->wb_head = subreq;
nfs_release_request(old_head);
if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) {
nfs_release_request(subreq);