NFS: Fix a page leak in nfs_destroy_unlinked_subrequests()
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>
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@ -432,6 +432,7 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list,
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}
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subreq->wb_head = subreq;
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nfs_release_request(old_head);
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if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) {
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nfs_release_request(subreq);
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