[Qemu-devel] [PATCH v2] vnc: fix segmentation fault when invalid vnc parameters are specified

* [Qemu-devel] [PATCH v2] vnc: fix segmentation fault when invalid vnc parameters are specified
@ 2015-03-12  7:33 arei.gonglei
  2015-03-12  8:09 ` Gerd Hoffmann
  0 siblings, 1 reply; 2+ messages in thread
From: arei.gonglei @ 2015-03-12  7:33 UTC (permalink / raw)
  To: qemu-devel; +Cc: Gonglei, mjt, kraxel

From: Gonglei <arei.gonglei@huawei.com>

Reproducer:
 #./qemu-system-x86_64 -vnc :0,ip
qemu-system-x86_64: -vnc :1,ip: Invalid parameter 'ip'
Segmentation fault (core dumped)

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
---
v2: remove useless initialization for variable id. (mjt)
---
 ui/vnc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ui/vnc.c b/ui/vnc.c
index 4b6ef1e..c5853d4 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -3698,8 +3698,13 @@ QemuOpts *vnc_parse_func(const char *str)
 {
     QemuOptsList *olist = qemu_find_opts("vnc");
     QemuOpts *opts = qemu_opts_parse(olist, str, 1);
-    const char *id = qemu_opts_id(opts);
+    const char *id;
 
+    if (!opts) {
+        return NULL;
+    }
+
+    id = qemu_opts_id(opts);
     if (!id) {
         /* auto-assign id if not present */
         vnc_auto_assign_id(olist, opts);
-- 
1.7.12.4

^ permalink raw reply related	[flat|nested] 2+ messages in thread