From 4f4a8c0895cec56df2141df526a1ee87fdb94a2b Mon Sep 17 00:00:00 2001 From: Hans Dedecker Date: Sun, 22 Apr 2018 22:23:49 +0200 Subject: system-linux: fix strncpy bounds Fix strncpy bounds as reported by Coverity in CID 1434988, 1328977, 1328953, 1328952, 1328951, 1328950, 1328949 and 1328944. Signed-off-by: Hans Dedecker --- system-linux.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/system-linux.c b/system-linux.c index 9b654d1..2a108e2 100644 --- a/system-linux.c +++ b/system-linux.c @@ -665,7 +665,7 @@ static int system_bridge_if(const char *bridge, struct device *dev, int cmd, voi ifr.ifr_ifindex = dev->ifindex; else ifr.ifr_data = data; - strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1); return ioctl(sock_ioctl, cmd, &ifr); } @@ -768,7 +768,7 @@ int system_bridge_delif(struct device *bridge, struct device *dev) int system_if_resolve(struct device *dev) { struct ifreq ifr; - strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr)) return ifr.ifr_ifindex; else @@ -780,7 +780,7 @@ static int system_if_flags(const char *ifname, unsigned add, unsigned rem) struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0) return -1; @@ -1333,7 +1333,7 @@ system_if_get_settings(struct device *dev, struct device_settings *s) char buf[10]; memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) { s->mtu = ifr.ifr_mtu; @@ -1430,7 +1430,7 @@ system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned char buf[12]; memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); if (s->flags & DEV_OPT_MTU & apply_mask) { ifr.ifr_mtu = s->mtu; if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0) @@ -1719,7 +1719,7 @@ system_if_dump_info(struct device *dev, struct blob_buf *b) memset(&ecmd, 0, sizeof(ecmd)); memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1); ifr.ifr_data = (caddr_t) &ecmd; ecmd.cmd = ETHTOOL_GSET; @@ -2255,7 +2255,7 @@ static int tunnel_ioctl(const char *name, int cmd, void *p) struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); + strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1); ifr.ifr_ifru.ifru_data = p; return ioctl(sock_ioctl, cmd, &ifr); } @@ -2966,7 +2966,7 @@ static int system_add_proto_tunnel(const char *name, const uint8_t proto, const if (p.iph.ttl && p.iph.frag_off == 0) return -EINVAL; - strncpy(p.name, name, sizeof(p.name)); + strncpy(p.name, name, sizeof(p.name) - 1); switch (p.iph.protocol) { case IPPROTO_IPIP: -- cgit v1.2.3