net/9p: fix client code to fail more gracefully on protocol error
commit b85f7d92d7bd7e3298159e8b1eed8cb8cbbb0348 upstream.
There was a BUG_ON to protect against a bad id which could be dealt with
more gracefully.
Reported-by: Natalie Orlin <norlin@us.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/net/9p/client.c b/net/9p/client.c
index 9e3b0e6..ffaf0df 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -280,7 +280,8 @@
* buffer to read the data into */
tag++;
- BUG_ON(tag >= c->max_tag);
+ if(tag >= c->max_tag)
+ return NULL;
row = tag / P9_ROW_MAXTAG;
col = tag % P9_ROW_MAXTAG;