diff options
Diffstat (limited to 'accel-pppd/net.c')
| -rw-r--r-- | accel-pppd/net.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/accel-pppd/net.c b/accel-pppd/net.c index c619deed..b31cdf44 100644 --- a/accel-pppd/net.c +++ b/accel-pppd/net.c @@ -223,9 +223,15 @@ static int def_get_ifindex(const char *ifname) { struct kern_net *n = container_of(net, typeof(*n), net); struct ifreq ifr; + size_t len; + + if (!ifname || (len = strnlen(ifname, IFNAMSIZ)) >= IFNAMSIZ) { + log_ppp_error("invalid interface name\n"); + return -1; + } memset(&ifr, 0, sizeof(ifr)); - strcpy(ifr.ifr_name, ifname); + memcpy(ifr.ifr_name, ifname, len); if (ioctl(n->sock, SIOCGIFINDEX, &ifr)) { log_ppp_error("ioctl(SIOCGIFINDEX): %s\n", strerror(errno)); |