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| author | Raimo Niskanen <[email protected]> | 2010-12-14 09:40:32 +0100 |
|---|---|---|
| committer | Raimo Niskanen <[email protected]> | 2010-12-14 09:40:32 +0100 |
| commit | 81bebfd6c46d59ad62784120734c2ff2547184c1 (patch) | |
| tree | 5a37fb156a0d9bc142ddcc10dc406eb0457edb06 | |
| parent | 99e34bba1a60b262e24496cc9288b549360c6377 (diff) | |
| download | otp-81bebfd6c46d59ad62784120734c2ff2547184c1.tar.gz otp-81bebfd6c46d59ad62784120734c2ff2547184c1.tar.bz2 otp-81bebfd6c46d59ad62784120734c2ff2547184c1.zip | |
Fix segfault for NULL return value fields from getifaddrs()
| -rw-r--r-- | erts/emulator/drivers/common/inet_drv.c | 52 |
1 files changed, 29 insertions, 23 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c index 1382d1dfe4..818bc6334e 100644 --- a/erts/emulator/drivers/common/inet_drv.c +++ b/erts/emulator/drivers/common/inet_drv.c @@ -4945,39 +4945,45 @@ static int inet_ctl_getifaddrs(inet_descriptor* desc_p, *buf_p++ = '\0'; *buf_p++ = INET_IFOPT_FLAGS; put_int32(IFGET_FLAGS(ifa_p->ifa_flags), buf_p); buf_p += 4; - if (ifa_p->ifa_addr->sa_family == AF_INET + if (ifa_p->ifa_addr) { + if (ifa_p->ifa_addr->sa_family == AF_INET #if defined(AF_INET6) - || ifa_p->ifa_addr->sa_family == AF_INET6 + || ifa_p->ifa_addr->sa_family == AF_INET6 #endif - ) { - SOCKADDR_TO_BUF(INET_IFOPT_ADDR, ifa_p->ifa_addr); - BUF_ENSURE(1); - SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, ifa_p->ifa_netmask); - if (ifa_p->ifa_flags & IFF_POINTOPOINT) { - BUF_ENSURE(1); - SOCKADDR_TO_BUF(INET_IFOPT_DSTADDR, ifa_p->ifa_dstaddr); - } else if (ifa_p->ifa_flags & IFF_BROADCAST) { - BUF_ENSURE(1); - SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR, ifa_p->ifa_broadaddr); + ) { + SOCKADDR_TO_BUF(INET_IFOPT_ADDR, ifa_p->ifa_addr); + if (ifa_p->ifa_netmask) { + BUF_ENSURE(1); + SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, ifa_p->ifa_netmask); + } + if (ifa_p->ifa_dstaddr && + (ifa_p->ifa_flags & IFF_POINTOPOINT)) { + BUF_ENSURE(1); + SOCKADDR_TO_BUF(INET_IFOPT_DSTADDR, ifa_p->ifa_dstaddr); + } else if (ifa_p->ifa_broadaddr && + (ifa_p->ifa_flags & IFF_BROADCAST)) { + BUF_ENSURE(1); + SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR, ifa_p->ifa_broadaddr); + } } - } #if defined(AF_LINK) || defined(AF_PACKET) - else if ( + else if ( #if defined(AF_LINK) - ifa_p->ifa_addr->sa_family == AF_LINK + ifa_p->ifa_addr->sa_family == AF_LINK #else - 0 + 0 #endif #if defined(AF_PACKET) - || ifa_p->ifa_addr->sa_family == AF_PACKET + || ifa_p->ifa_addr->sa_family == AF_PACKET #endif - ) { - char *bp = buf_p; - BUF_ENSURE(1); - SOCKADDR_TO_BUF(INET_IFOPT_HWADDR, ifa_p->ifa_addr); - if (buf_p - bp < 4) buf_p = bp; /* Empty hwaddr */ - } + ) { + char *bp = buf_p; + BUF_ENSURE(1); + SOCKADDR_TO_BUF(INET_IFOPT_HWADDR, ifa_p->ifa_addr); + if (buf_p - bp < 4) buf_p = bp; /* Empty hwaddr */ + } #endif + } BUF_ENSURE(1); *buf_p++ = '\0'; } |