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-rw-r--r--drivers/xen/xenbus/xenbus_dev_frontend.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/xen/xenbus/xenbus_dev_frontend.c b/drivers/xen/xenbus/xenbus_dev_frontend.c
index 527dc2a3b89f..89f76252a16f 100644
--- a/drivers/xen/xenbus/xenbus_dev_frontend.c
+++ b/drivers/xen/xenbus/xenbus_dev_frontend.c
@@ -369,6 +369,10 @@ static int xenbus_write_watch(unsigned msg_type, struct xenbus_file_priv *u)
369 goto out; 369 goto out;
370 } 370 }
371 token++; 371 token++;
372 if (memchr(token, 0, u->u.msg.len - (token - path)) == NULL) {
373 rc = -EILSEQ;
374 goto out;
375 }
372 376
373 if (msg_type == XS_WATCH) { 377 if (msg_type == XS_WATCH) {
374 watch = alloc_watch_adapter(path, token); 378 watch = alloc_watch_adapter(path, token);