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#
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# Backported from upstream.
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#
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# commit a445af0bc722d620afed7683cd320c0e4c7c6059
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# Author: Andreas Schwab <schwab@suse.de>
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# Date: Tue Jan 29 14:45:15 2013 +0100
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#
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# Fix buffer overrun in regexp matcher
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#
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# ChangeLog/
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# 2013-02-12 Andreas Schwab <schwab@suse.de>
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#
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# [BZ #15078]
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# * posix/regexec.c (extend_buffers): Add parameter min_len.
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# (check_matching): Pass minimum needed length.
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# (clean_state_log_if_needed): Likewise.
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# (get_subexp): Likewise.
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# * posix/Makefile (tests): Add bug-regex34.
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# (bug-regex34-ENV): Define.
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# * posix/bug-regex34.c: New file.
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#
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--- glibc-2.17-c758a686/posix/Makefile 2012-12-24 22:02:13.000000000 -0500
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+++ glibc-2.17-c758a686/posix/Makefile 2013-03-17 15:30:13.121068666 -0400
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@@ -86,7 +86,7 @@
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tst-rfc3484-3 \
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tst-getaddrinfo3 tst-fnmatch2 tst-cpucount tst-cpuset \
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bug-getopt1 bug-getopt2 bug-getopt3 bug-getopt4 \
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- bug-getopt5 tst-getopt_long1
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+ bug-getopt5 tst-getopt_long1 bug-regex34
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xtests := bug-ga2
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ifeq (yes,$(build-shared))
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test-srcs := globtest
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@@ -195,6 +195,7 @@
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bug-regex30-ENV = LOCPATH=$(common-objpfx)localedata
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bug-regex32-ENV = LOCPATH=$(common-objpfx)localedata
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bug-regex33-ENV = LOCPATH=$(common-objpfx)localedata
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+bug-regex34-ENV = LOCPATH=$(common-objpfx)localedata
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tst-rxspencer-ARGS = --utf8 rxspencer/tests
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tst-rxspencer-ENV = LOCPATH=$(common-objpfx)localedata
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tst-pcre-ARGS = PCRE.tests
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diff --git glibc-2.17-c758a686/posix/bug-regex34.c glibc-2.17-c758a686/posix/bug-regex34.c
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new file mode 100644
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index 0000000..bb3b613
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--- /dev/null
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+++ glibc-2.17-c758a686/posix/bug-regex34.c
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@@ -0,0 +1,46 @@
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+/* Test re_search with multi-byte characters in UTF-8.
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+ Copyright (C) 2013 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#define _GNU_SOURCE 1
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+#include <stdio.h>
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+#include <string.h>
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+#include <locale.h>
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+#include <regex.h>
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+
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+static int
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+do_test (void)
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+{
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+ struct re_pattern_buffer r;
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+ /* ကျွန်ုပ်x */
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+ 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";
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+
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+ if (setlocale (LC_ALL, "en_US.UTF-8") == NULL)
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+ {
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+ puts ("setlocale failed");
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+ return 1;
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+ }
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+ memset (&r, 0, sizeof (r));
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+
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+ re_compile_pattern ("[^x]x", 5, &r);
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+ /* This was triggering a buffer overflow. */
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+ re_search (&r, s, strlen (s), 0, strlen (s), 0);
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+ return 0;
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+}
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+
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29e444 |
+#define TEST_FUNCTION do_test ()
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29e444 |
+#include "../test-skeleton.c"
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
12745e |
diff --git glibc-2.17-c758a686/posix/regexec.c glibc-2.17-c758a686/posix/regexec.c
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29e444 |
index 7f2de85..5ca2bf6 100644
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12745e |
--- glibc-2.17-c758a686/posix/regexec.c
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
12745e |
+++ glibc-2.17-c758a686/posix/regexec.c
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
@@ -197,7 +197,7 @@ static int group_nodes_into_DFAstates (const re_dfa_t *dfa,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
static int check_node_accept (const re_match_context_t *mctx,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
const re_token_t *node, int idx)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
internal_function;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
-static reg_errcode_t extend_buffers (re_match_context_t *mctx)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
+static reg_errcode_t extend_buffers (re_match_context_t *mctx, int min_len)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
internal_function;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
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29e444 |
/* Entry point for POSIX code. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
@@ -1160,7 +1160,7 @@ check_matching (re_match_context_t *mctx, int fl_longest_match,
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29e444 |
|| (BE (next_char_idx >= mctx->input.valid_len, 0)
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29e444 |
&& mctx->input.valid_len < mctx->input.len))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
{
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
- err = extend_buffers (mctx);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
+ err = extend_buffers (mctx, next_char_idx + 1);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
if (BE (err != REG_NOERROR, 0))
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29e444 |
{
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
assert (err == REG_ESPACE);
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29e444 |
@@ -1738,7 +1738,7 @@ clean_state_log_if_needed (re_match_context_t *mctx, int next_state_log_idx)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
&& mctx->input.valid_len < mctx->input.len))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
{
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
reg_errcode_t err;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
- err = extend_buffers (mctx);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
+ err = extend_buffers (mctx, next_state_log_idx + 1);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
if (BE (err != REG_NOERROR, 0))
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29e444 |
return err;
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29e444 |
}
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29e444 |
@@ -2792,7 +2792,7 @@ get_subexp (re_match_context_t *mctx, int bkref_node, int bkref_str_idx)
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29e444 |
if (bkref_str_off >= mctx->input.len)
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29e444 |
break;
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29e444 |
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29e444 |
- err = extend_buffers (mctx);
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29e444 |
+ err = extend_buffers (mctx, bkref_str_off + 1);
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29e444 |
if (BE (err != REG_NOERROR, 0))
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29e444 |
return err;
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29e444 |
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29e444 |
@@ -4102,7 +4102,7 @@ check_node_accept (const re_match_context_t *mctx, const re_token_t *node,
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29e444 |
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29e444 |
static reg_errcode_t
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29e444 |
internal_function __attribute_warn_unused_result__
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29e444 |
-extend_buffers (re_match_context_t *mctx)
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29e444 |
+extend_buffers (re_match_context_t *mctx, int min_len)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
{
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29e444 |
reg_errcode_t ret;
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29e444 |
re_string_t *pstr = &mctx->input;
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29e444 |
@@ -4111,8 +4111,10 @@ extend_buffers (re_match_context_t *mctx)
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29e444 |
if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
return REG_ESPACE;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
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29e444 |
- /* Double the lengthes of the buffers. */
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29e444 |
- ret = re_string_realloc_buffers (pstr, MIN (pstr->len, pstr->bufs_len * 2));
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
+ /* Double the lengthes of the buffers, but allocate at least MIN_LEN. */
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29e444 |
+ ret = re_string_realloc_buffers (pstr,
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29e444 |
+ MAX (min_len,
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29e444 |
+ MIN (pstr->len, pstr->bufs_len * 2)));
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
if (BE (ret != REG_NOERROR, 0))
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
return ret;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
29e444 |
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