From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 27 Mar 2012 22:13:02 +0000 (-0400)
Subject: NFSv4: Fix two infinite loops in the mount code
X-Git-Tag: v3.3.1~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8633c0f77dae2f0aae7fb38782402b32734e9675;p=thirdparty%2Fkernel%2Fstable.git

NFSv4: Fix two infinite loops in the mount code

commit 05e9cfb408b24debb3a85fd98edbfd09dd148881 upstream.

We can currently loop forever in nfs4_lookup_root() and in
nfs41_proc_secinfo_no_name(), if the first iteration returns a
NFS4ERR_DELAY or something else that causes exception.retry to get
set.

Reported-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 78a6fe8ad3fdd..9996d54102b64 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2249,11 +2249,12 @@ static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
 		switch (err) {
 		case 0:
 		case -NFS4ERR_WRONGSEC:
-			break;
+			goto out;
 		default:
 			err = nfs4_handle_exception(server, err, &exception);
 		}
 	} while (exception.retry);
+out:
 	return err;
 }
 
@@ -6068,11 +6069,12 @@ nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
 		case 0:
 		case -NFS4ERR_WRONGSEC:
 		case -NFS4ERR_NOTSUPP:
-			break;
+			goto out;
 		default:
 			err = nfs4_handle_exception(server, err, &exception);
 		}
 	} while (exception.retry);
+out:
 	return err;
 }