fix: interface name length on copy to ifreq

robert-burger · Sep 24, 2024 · 828cd98 · 828cd98
1 parent bdf058a
commit 828cd98
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/hw_sock_raw.c b/src/hw_sock_raw.c
@@ -198,7 +198,7 @@ int hw_device_sock_raw_open(struct hw_sock_raw *phw_sock_raw, struct ec *pec, co
         ec_log(10, "HW_OPEN", "binding raw socket to %s\n", devname);
 
         (void)memset(&ifr, 0, sizeof(ifr));
-        (void)strncpy(ifr.ifr_name, devname, IFNAMSIZ);
+        (void)strncpy(ifr.ifr_name, devname, min(strlen(devname), IFNAMSIZ));
         ioctl(phw_sock_raw->sockfd, SIOCGIFMTU, &ifr);
         phw_sock_raw->common.mtu_size = ifr.ifr_mtu;
         ec_log(10, "hw_open", "got mtu size %d\n", phw_sock_raw->common.mtu_size);