[PATCH 2/3] can-host-socketcan: Fix crash when 'if' option is not set

[Eduardo Habkost]

Fix the following crash:

  $ qemu-system-x86_64 -object can-host-socketcan,id=obj0
  Segmentation fault (core dumped)

Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
---
Cc: Pavel Pisa <p...@cmp.felk.cvut.cz>
Cc: Vikram Garhwal <fnu.vik...@xilinx.com>
Cc: Jason Wang <jasow...@redhat.com>
Cc: qemu-devel@nongnu.org
---
 net/can/can_socketcan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/can/can_socketcan.c b/net/can/can_socketcan.c
index 92b1f79385..4b68f60c6b 100644
--- a/net/can/can_socketcan.c
+++ b/net/can/can_socketcan.c
@@ -194,6 +194,11 @@ static void can_host_socketcan_connect(CanHostState *ch, 
Error **errp)
     struct sockaddr_can addr;
     struct ifreq ifr;
 
+    if (!c->ifname) {
+        error_setg(errp, "'if' property not set");
+        return;
+    }
+
     /* open socket */
     s = qemu_socket(PF_CAN, SOCK_RAW, CAN_RAW);
     if (s < 0) {
-- 
2.26.2