[posix] Verify in otPlatUdpBindToNetif if Backbone Interface is set.

Commit adds check to `otPlatUdpBindToNetif` if backbone interface is set to correct value to prevent `setsockopt` from crashing the ot-daemon.
canisLupus1313 · Dec 11, 2023 · 78a8bea · 78a8bea
1 parent bf99448
commit 78a8bea
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/posix/platform/udp.cpp b/src/posix/platform/udp.cpp
@@ -323,6 +323,11 @@ otError otPlatUdpBindToNetif(otUdpSocket *aUdpSocket, otNetifIdentifier aNetifId
     case OT_NETIF_BACKBONE:
     {
 #if OPENTHREAD_CONFIG_BACKBONE_ROUTER_ENABLE
+        if (otSysGetInfraNetifName() == 0 || otSysGetInfraNetifName()[0] == 0)
+        {
+            otLogWarnPlat("No backbone interface given, %s fails.", __func__);
+            ExitNow(error = OT_ERROR_INVALID_ARGS);
+        }
 #if __linux__
         VerifyOrExit(setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, otSysGetInfraNetifName(),
                                 strlen(otSysGetInfraNetifName())) == 0,