diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | resolv/Makefile | 4 | ||||
| -rw-r--r-- | resolv/inet_ntop.c | 2 | ||||
| -rw-r--r-- | resolv/tst-inet_ntop.c | 111 |
4 files changed, 122 insertions, 3 deletions
diff --git a/ChangeLog b/ChangeLog index 918a53bf72..9353a0959f 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2007-04-30 Jakub Jelinek <jakub@redhat.com> + + [BZ #4439] + * resolv/inet_ntop.c (inet_ntop4): Take terminating '\0' into + account in the size check. + * resolv/tst-inet_ntop.c: New test. + * resolv/Makefile (tests): Add tst-inet_ntop. + 2007-04-30 Ulrich Drepper <drepper@redhat.com> Jakub Jelinek <jakub@redhat.com> diff --git a/resolv/Makefile b/resolv/Makefile index f6230da8fb..6ac226735a 100644 --- a/resolv/Makefile +++ b/resolv/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1994,1995,1996,1997,1998,1999,2000,2001,2003,2004 +# Copyright (C) 1994,1995,1996,1997,1998,1999,2000,2001,2003,2004,2007 # Free Software Foundation, Inc. # This file is part of the GNU C Library. @@ -32,7 +32,7 @@ distribute := ../conf/portability.h mapv4v6addr.h mapv4v6hostent.h \ routines := herror inet_addr inet_ntop inet_pton nsap_addr res_init \ res_hconf res_libc res-state -tests = tst-aton tst-leaks +tests = tst-aton tst-leaks tst-inet_ntop xtests = tst-leaks2 generate := mtrace-tst-leaks tst-leaks.mtrace tst-leaks2.mtrace diff --git a/resolv/inet_ntop.c b/resolv/inet_ntop.c index e5553a1d3b..1222d08bda 100644 --- a/resolv/inet_ntop.c +++ b/resolv/inet_ntop.c @@ -96,7 +96,7 @@ inet_ntop4(src, dst, size) static const char fmt[] = "%u.%u.%u.%u"; char tmp[sizeof "255.255.255.255"]; - if (SPRINTF((tmp, fmt, src[0], src[1], src[2], src[3])) > size) { + if (SPRINTF((tmp, fmt, src[0], src[1], src[2], src[3])) >= size) { __set_errno (ENOSPC); return (NULL); } diff --git a/resolv/tst-inet_ntop.c b/resolv/tst-inet_ntop.c new file mode 100644 index 0000000000..a042c74c91 --- /dev/null +++ b/resolv/tst-inet_ntop.c @@ -0,0 +1,111 @@ +#include <arpa/inet.h> +#include <errno.h> +#include <netinet/in.h> +#include <stdio.h> +#include <string.h> + +int +main (void) +{ + struct in_addr addr4; + struct in6_addr addr6; + char buf[64]; + int result = 0; + + addr4.s_addr = 0xe0e0e0e0; + addr6.s6_addr16[0] = 0; + addr6.s6_addr16[1] = 0; + addr6.s6_addr16[2] = 0; + addr6.s6_addr16[3] = 0; + addr6.s6_addr16[4] = 0; + addr6.s6_addr16[5] = 0xffff; + addr6.s6_addr32[3] = 0xe0e0e0e0; + memset (buf, 'x', sizeof buf); + + if (inet_ntop (AF_INET, &addr4, buf, 15) != NULL) + { + puts ("1st inet_ntop returned non-NULL"); + result++; + } + else if (errno != ENOSPC) + { + puts ("1st inet_ntop didn't fail with ENOSPC"); + result++; + } + if (buf[15] != 'x') + { + puts ("1st inet_ntop wrote past the end of buffer"); + result++; + } + + if (inet_ntop (AF_INET, &addr4, buf, 16) != buf) + { + puts ("2nd inet_ntop did not return buf"); + result++; + } + if (memcmp (buf, "224.224.224.224\0" "xxxxxxxx", 24) != 0) + { + puts ("2nd inet_ntop wrote past the end of buffer"); + result++; + } + + if (inet_ntop (AF_INET6, &addr6, buf, 22) != NULL) + { + puts ("3rd inet_ntop returned non-NULL"); + result++; + } + else if (errno != ENOSPC) + { + puts ("3rd inet_ntop didn't fail with ENOSPC"); + result++; + } + if (buf[22] != 'x') + { + puts ("3rd inet_ntop wrote past the end of buffer"); + result++; + } + + if (inet_ntop (AF_INET6, &addr6, buf, 23) != buf) + { + puts ("4th inet_ntop did not return buf"); + result++; + } + if (memcmp (buf, "::ffff:224.224.224.224\0" "xxxxxxxx", 31) != 0) + { + puts ("4th inet_ntop wrote past the end of buffer"); + result++; + } + + memset (&addr6.s6_addr, 0xe0, sizeof (addr6.s6_addr)); + + if (inet_ntop (AF_INET6, &addr6, buf, 39) != NULL) + { + puts ("5th inet_ntop returned non-NULL"); + result++; + } + else if (errno != ENOSPC) + { + puts ("5th inet_ntop didn't fail with ENOSPC"); + result++; + } + if (buf[39] != 'x') + { + puts ("5th inet_ntop wrote past the end of buffer"); + result++; + } + + if (inet_ntop (AF_INET6, &addr6, buf, 40) != buf) + { + puts ("6th inet_ntop did not return buf"); + result++; + } + if (memcmp (buf, "e0e0:e0e0:e0e0:e0e0:e0e0:e0e0:e0e0:e0e0\0" + "xxxxxxxx", 48) != 0) + { + puts ("6th inet_ntop wrote past the end of buffer"); + result++; + } + + + return result; +} |