patches/glibc/2.9/120-_nss_dns_gethostbyaddr2_r-check-and-adjust-the-buffer-alignment.patch
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Tue Jul 31 22:27:29 2012 +0200 (2012-07-31)
changeset 3018 7776e8369284
parent 1201 c9967a6e3b25
permissions -rw-r--r--
complibs/cloog: create missing m4 dir

Because we now patch configure.in and configure, the Makefile quicks
in a re-build rule as the source files are now more recent than the
bundled generated files, and that fails because the m4 directory
is missing, although on some systems where aclocal is not installed,
the re-build rule does nothing (except a warning).

Always create tht directory.

Reported-by: Per Arnold Blaasmo <per-arnold.blaasmo@atmel.com>
[Also thanks to Thomas De Schampheleire <patrickdepinguin@gmail.com>
for some digging works on this issue]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/0050_all_glibc-_nss_dns_gethostbyaddr2_r-check-and-adjust-the-buffer-alignment.patch
     2 
     3 -= BEGIN original header =-
     4 http://sourceware.org/ml/libc-alpha/2009-01/msg00000.html
     5 
     6 From 8ad7030880eaa18dcabf8e284e79026301fd3fa4 Mon Sep 17 00:00:00 2001
     7 From: Ulrich Drepper <drepper@redhat.com>
     8 Date: Thu, 8 Jan 2009 00:02:38 +0000
     9 Subject: [PATCH] (_nss_dns_gethostbyaddr2_r): Check and adjust the buffer alignment.
    10 
    11 -= END original header =-
    12 
    13 diff -durN glibc-2_9.orig/resolv/nss_dns/dns-host.c glibc-2_9/resolv/nss_dns/dns-host.c
    14 --- glibc-2_9.orig/resolv/nss_dns/dns-host.c	2008-11-12 08:52:20.000000000 +0100
    15 +++ glibc-2_9/resolv/nss_dns/dns-host.c	2009-02-02 22:00:36.000000000 +0100
    16 @@ -364,6 +364,19 @@
    17    int n, status;
    18    int olderr = errno;
    19  
    20 + uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct host_data);
    21 + buffer += pad;
    22 + buflen = buflen > pad ? buflen - pad : 0;
    23 +
    24 + if (__builtin_expect (buflen < sizeof (struct host_data), 0))
    25 +   {
    26 +     *errnop = ERANGE;
    27 +     *h_errnop = NETDB_INTERNAL;
    28 +     return NSS_STATUS_TRYAGAIN;
    29 +   }
    30 +
    31 + host_data = (struct host_data *) buffer;
    32 +
    33    if (__res_maybe_init (&_res, 0) == -1)
    34      return NSS_STATUS_UNAVAIL;
    35