[ 15/46] NFSv3: Ensure that do_proc_get_root() reports errors correctly

From: Greg Kroah-Hartman
Date: Wed Sep 12 2012 - 19:52:13 EST

From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>

3.0-stable review patch. If anyone has any objections, please let me know.


From: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>

commit 086600430493e04b802bee6e5b3ce0458e4eb77f upstream.

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,

Reported-by: Yuanming Chen <hikvision_linux@xxxxxxx>
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

fs/nfs/nfs3proc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -68,7 +68,7 @@ do_proc_get_root(struct rpc_clnt *client
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);

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