9p: fix oops in protocol stat parsing error path.

When we get an error on parsing a stat due to a protocol bug, 
we can generate an oops during cleanup because we didn't 
initialize the string pointers in the stat structure.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 84fa21271876..29be52439086 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -215,9 +215,9 @@ p9pdu_vreadf(struct p9_fcall *pdu, int optional, const char *fmt, va_list ap)
                                 struct p9_wstat *stbuf =
                                     va_arg(ap, struct p9_wstat *);
 
-                                stbuf->extension = NULL;
+                                memset(stbuf, 0, sizeof(struct p9_wstat));
                                 stbuf->n_uid = stbuf->n_gid = stbuf->n_muid =
-                                    -1;
+                                                                        -1;
                                 errcode =
                                     p9pdu_readf(pdu, optional,
                                                 "wwdQdddqssss?sddd",