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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Trond Myklebust <trond.myklebust@hammerspace.com>
Subject: [PATCH 4.19 241/280] NFS: Fix an I/O request leakage in nfs_do_recoalesce
Date:   Fri, 22 Mar 2019 12:16:34 +0100
Message-Id: <20190322111339.454217698@linuxfoundation.org>
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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Trond Myklebust <trond.myklebust@hammerspace.com>

commit 4d91969ed4dbcefd0e78f77494f0cb8fada9048a upstream.

Whether we need to exit early, or just reprocess the list, we
must not lost track of the request which failed to get recoalesced.

Fixes: 03d5eb65b538 ("NFS: Fix a memory leak in nfs_do_recoalesce")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.0+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfs/pagelist.c |    1 -
 1 file changed, 1 deletion(-)

--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1093,7 +1093,6 @@ static int nfs_do_recoalesce(struct nfs_
 			struct nfs_page *req;
 
 			req = list_first_entry(&head, struct nfs_page, wb_list);
-			nfs_list_remove_request(req);
 			if (__nfs_pageio_add_request(desc, req))
 				continue;
 			if (desc->pg_error < 0) {