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2.17-4 

- Fixed i386 glibc builds (#917161).
  - Fixed multibyte character processing crash in regexp (#905877, CVE-2013-0242)
This commit is contained in:
Carlos O'Donell 2013-03-17 20:13:38 -04:00
parent 6cfdaac5b6
commit b5a300152e
2 changed files with 163 additions and 6 deletions
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147
glibc-rh905877.patch Normal file
View File

@ -0,0 +1,147 @@
#
# Backported from upstream.
#
# 2013-02-12 Andreas Schwab <schwab@suse.de>
#
# [BZ #15078]
# * posix/regexec.c (extend_buffers): Add parameter min_len.
# (check_matching): Pass minimum needed length.
# (clean_state_log_if_needed): Likewise.
# (get_subexp): Likewise.
# * posix/Makefile (tests): Add bug-regex34.
# (bug-regex34-ENV): Define.
# * posix/bug-regex34.c: New file.
#
--- glibc-2.17-c758a686/posix/Makefile 2012-12-24 22:02:13.000000000 -0500
+++ glibc-2.17-c758a686/posix/Makefile 2013-03-17 15:30:13.121068666 -0400
@@ -86,7 +86,7 @@
tst-rfc3484-3 \
tst-getaddrinfo3 tst-fnmatch2 tst-cpucount tst-cpuset \
bug-getopt1 bug-getopt2 bug-getopt3 bug-getopt4 \
- bug-getopt5 tst-getopt_long1
+ bug-getopt5 tst-getopt_long1 bug-regex34
xtests := bug-ga2
ifeq (yes,$(build-shared))
test-srcs := globtest
@@ -195,6 +195,7 @@
bug-regex30-ENV = LOCPATH=$(common-objpfx)localedata
bug-regex32-ENV = LOCPATH=$(common-objpfx)localedata
bug-regex33-ENV = LOCPATH=$(common-objpfx)localedata
+bug-regex34-ENV = LOCPATH=$(common-objpfx)localedata
tst-rxspencer-ARGS = --utf8 rxspencer/tests
tst-rxspencer-ENV = LOCPATH=$(common-objpfx)localedata
tst-pcre-ARGS = PCRE.tests
diff --git a/posix/bug-regex34.c b/posix/bug-regex34.c
new file mode 100644
index 0000000..bb3b613
--- /dev/null
+++ b/posix/bug-regex34.c
@@ -0,0 +1,46 @@
+/* Test re_search with multi-byte characters in UTF-8.
+ Copyright (C) 2013 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
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define _GNU_SOURCE 1
+#include <stdio.h>
+#include <string.h>
+#include <locale.h>
+#include <regex.h>
+
+static int
+do_test (void)
+{
+ struct re_pattern_buffer r;
+ /* ကျွန်ုပ်x */
+ const char *s = "\xe1\x80\x80\xe1\x80\xbb\xe1\x80\xbd\xe1\x80\x94\xe1\x80\xba\xe1\x80\xaf\xe1\x80\x95\xe1\x80\xbax";
+
+ if (setlocale (LC_ALL, "en_US.UTF-8") == NULL)
+ {
+ puts ("setlocale failed");
+ return 1;
+ }
+ memset (&r, 0, sizeof (r));
+
+ re_compile_pattern ("[^x]x", 5, &r);
+ /* This was triggering a buffer overflow. */
+ re_search (&r, s, strlen (s), 0, strlen (s), 0);
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/posix/regexec.c b/posix/regexec.c
index 7f2de85..5ca2bf6 100644
--- a/posix/regexec.c
+++ b/posix/regexec.c
@@ -197,7 +197,7 @@ static int group_nodes_into_DFAstates (const re_dfa_t *dfa,
static int check_node_accept (const re_match_context_t *mctx,
const re_token_t *node, int idx)
internal_function;
-static reg_errcode_t extend_buffers (re_match_context_t *mctx)
+static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len)
internal_function;
/* Entry point for POSIX code. */
@@ -1160,7 +1160,7 @@ check_matching (re_match_context_t *mctx, int fl_longest_match,
|| (BE (next_char_idx >= mctx->input.valid_len, 0)
&& mctx->input.valid_len < mctx->input.len))
{
- err = extend_buffers (mctx);
+ err = extend_buffers (mctx, next_char_idx + 1);
if (BE (err != REG_NOERROR, 0))
{
assert (err == REG_ESPACE);
@@ -1738,7 +1738,7 @@ clean_state_log_if_needed (re_match_context_t *mctx, int next_state_log_idx)
&& mctx->input.valid_len < mctx->input.len))
{
reg_errcode_t err;
- err = extend_buffers (mctx);
+ err = extend_buffers (mctx, next_state_log_idx + 1);
if (BE (err != REG_NOERROR, 0))
return err;
}
@@ -2792,7 +2792,7 @@ get_subexp (re_match_context_t *mctx, int bkref_node, int bkref_str_idx)
if (bkref_str_off >= mctx->input.len)
break;
- err = extend_buffers (mctx);
+ err = extend_buffers (mctx, bkref_str_off + 1);
if (BE (err != REG_NOERROR, 0))
return err;
@@ -4102,7 +4102,7 @@ check_node_accept (const re_match_context_t *mctx, const re_token_t *node,
static reg_errcode_t
internal_function __attribute_warn_unused_result__
-extend_buffers (re_match_context_t *mctx)
+extend_buffers (re_match_context_t *mctx, int min_len)
{
reg_errcode_t ret;
re_string_t *pstr = &mctx->input;
@@ -4111,8 +4111,10 @@ extend_buffers (re_match_context_t *mctx)
if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0))
return REG_ESPACE;
- /* Double the lengthes of the buffers. */
- ret = re_string_realloc_buffers (pstr, MIN (pstr->len, pstr->bufs_len * 2));
+ /* Double the lengthes of the buffers, but allocate at least MIN_LEN. */
+ ret = re_string_realloc_buffers (pstr,
+ MAX (min_len,
+ MIN (pstr->len, pstr->bufs_len * 2)));
if (BE (ret != REG_NOERROR, 0))
return ret;

22
glibc.spec
View File

@ -21,13 +21,13 @@
%define debuginfocommonarches %{biarcharches} alpha alphaev6
%define multiarcharches ppc %{power64} %{ix86} x86_64 %{sparc}
%define systemtaparches %{ix86} x86_64
# Remove -s to get verbose output.
%define silentrules PARALLELMFLAGS=-s
# Add -s for a less verbose build output.
%define silentrules PARALLELMFLAGS=
Summary: The GNU libc libraries
Name: glibc
Version: %{glibcversion}
Release: 3%{?dist}
Release: 4%{?dist}
# GPLv2+ is used in a bunch of programs, LGPLv2+ is used for libraries.
# Things that are linked directly into dynamically linked programs
# and shared libraries (e.g. crt files, lib*_nonshared.a) have an additional
@ -115,7 +115,8 @@ Patch0035: %{name}-rh911307.patch
#
# Patches from upstream
#
# Upstream BZ 15078
Patch2029: %{name}-rh905877.patch
#
# Patches submitted, but not yet approved upstream.
@ -406,6 +407,7 @@ package or when debugging this package.
%patch0034 -p1
%patch2028 -p1
%patch0035 -p1
%patch2029 -p1
# On powerpc32, hp timing is only available in power4/power6
# libs, not in base, so pre-power4 dynamic linker is incompatible
@ -424,10 +426,14 @@ GXX=g++
%ifarch %{ix86}
BuildFlags="-march=%{_target_cpu} -mtune=generic"
%endif
%ifarch i686
# We don't support building for i386. The generic i386 architecture lacks the
# atomic primitives required for NPTL support. However, when a user asks to
# build for i386 we interpret that as "for whatever works on x86" and we
# select i686. Thus we treat i386 as an alias for i686.
%ifarch i386 i686
BuildFlags="-march=i686 -mtune=generic"
%endif
%ifarch i386 i486 i586
%ifarch i486 i586
BuildFlags="$BuildFlags -mno-tls-direct-seg-refs"
%endif
%ifarch x86_64
@ -1201,6 +1207,10 @@ rm -f *.filelist*
%endif
%changelog
* Sun Mar 17 2013 Carlos O'Donell <carlos@redhat.com> - 2.17-4
- Fixed i386 glibc builds (#917161).
- Fixed multibyte character processing crash in regexp (#905877, CVE-2013-0242)
* Wed Feb 27 2013 Carlos O'Donell <carlos@redhat.com> - 2.17-3
- Renamed release engineering directory to `releng' (#903754).
- Fix building with gcc 4.8.0 (#911307).