From: Trond Myklebust trond.myklebust@hammerspace.com
commit add42de31721fa29ed77a7ce388674d69f9d31a4 upstream.
When we detach a subrequest from the list, we must also release the reference it holds to the parent.
Fixes: 5b2b5187fa85 ("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
--- fs/nfs/write.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -441,6 +441,7 @@ nfs_destroy_unlinked_subrequests(struct }
subreq->wb_head = subreq; + nfs_release_request(old_head);
if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) { nfs_release_request(subreq);