NFS: Fix an I/O request leakage in nfs_do_recoalesce

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>

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 5dfefae..7c9b75c 100644 (file)
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1093,7 +1093,6 @@ static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc)
                        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) {