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[Qemu-devel] [PULL 2/4] net: Fix a potential segfault
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PULL 2/4] net: Fix a potential segfault |
Date: |
Fri, 15 Jun 2018 11:01:21 +0800 |
From: Lin Ma <address@hidden>
If user forgets to provide any backend types for '-netdev' in qemu CLI,
It triggers seg fault.
e.g.
Expected:
$ qemu -netdev id=net0
qemu-system-x86_64: Parameter 'type' is missing
Actual:
$ qemu -netdev id=net0
Segmentation fault (core dumped)
Fixes: 547203ead4327 ("net: List available netdevs with "-netdev help")
Reviewed-by: Thomas Huth <address@hidden>
Cc: address@hidden
Signed-off-by: Lin Ma <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
---
net/net.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/net.c b/net/net.c
index efb9eaf..2a31339 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1093,7 +1093,9 @@ static int net_client_init(QemuOpts *opts, bool
is_netdev, Error **errp)
int ret = -1;
Visitor *v = opts_visitor_new(opts);
- if (is_netdev && is_help_option(qemu_opt_get(opts, "type"))) {
+ const char *type = qemu_opt_get(opts, "type");
+
+ if (is_netdev && type && is_help_option(type)) {
show_netdevs();
exit(0);
} else {
--
2.7.4