NFSv3: Ensure that do_proc_get_root() reports errors correctly

If the rpc call to NFS3PROC_FSINFO fails, then we need to report that
error so that the mount fails. Otherwise we can end up with a
superblock with completely unusable values for block sizes, maxfilesize,
etc.

Reported-by: Yuanming Chen <hikvision_linux@163.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 0952c791df36..d6b3b5f2d779 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -69,7 +69,7 @@ do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
         nfs_fattr_init(info->fattr);
         status = rpc_call_sync(client, &msg, 0);
         dprintk("%s: reply fsinfo: %d\n", __func__, status);
-        if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
+        if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
                 msg.rpc_resp = info->fattr;
                 status = rpc_call_sync(client, &msg, 0);