From f3a97f4c2c783e6e93fc6094e1a8d181b3f53b09 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Mon, 11 Oct 2010 09:38:00 -0400 Subject: Linux getifaddrs might return entries with ->ifa_addr being NULL. (cherry picked from commit 1751705d1c4e8b7aba391391d1d8d88fe8c9d8b8) --- ChangeLog | 6 ++++++ sysdeps/unix/sysv/linux/check_pf.c | 13 ++++++++----- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/ChangeLog b/ChangeLog index 46f0c2b6df..73cd52856d 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2010-10-11 Ulrich Drepper + + [BZ #12093] + * sysdeps/unix/sysv/linux/check_pf.c (__check_pf): ->ifa_addr might + be NULL. + 2010-09-15 Joseph Myers * sysdeps/unix/sysv/linux/getdents.c (__GETDENTS): When diff --git a/sysdeps/unix/sysv/linux/check_pf.c b/sysdeps/unix/sysv/linux/check_pf.c index e694342998..b789a32eab 100644 --- a/sysdeps/unix/sysv/linux/check_pf.c +++ b/sysdeps/unix/sysv/linux/check_pf.c @@ -1,5 +1,5 @@ /* Determine protocol families for which interfaces exist. Linux version. - Copyright (C) 2003, 2006, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 2003, 2006, 2007, 2008, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -304,10 +304,13 @@ __check_pf (bool *seen_ipv4, bool *seen_ipv6, struct ifaddrs *runp; for (runp = ifa; runp != NULL; runp = runp->ifa_next) - if (runp->ifa_addr->sa_family == PF_INET) - *seen_ipv4 = true; - else if (runp->ifa_addr->sa_family == PF_INET6) - *seen_ipv6 = true; + if (runp->ifa_addr != NULL) + { + if (runp->ifa_addr->sa_family == PF_INET) + *seen_ipv4 = true; + else if (runp->ifa_addr->sa_family == PF_INET6) + *seen_ipv6 = true; + } (void) freeifaddrs (ifa); #endif -- cgit 1.4.1