NFS: Fix a page leak in nfs_destroy_unlinked_subrequests()
commit5.4-rM2-2.2.x-imx-squashedadd42de317
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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6b64cbd058
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699d2c4d66
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@ -441,6 +441,7 @@ 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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