[BZ #17069]
* posix/regcomp.c (parse_expression): Deallocate partially
constructed tree before returning error.
* posix/Makefile.c (tests): Add bug-regex36.
(generated): Add bug-regex36.mtrace.
(tests-special): Add $(objpfx)bug-regex36-mem.out
(bug-regex36-ENV): New variable.
($(objpfx)bug-regex36-mem.out): New rule.
* posix/bug-regex36.c: New file.
diff --git a/posix/Makefile b/posix/Makefile
index 37d6d5f..e6b69b4 100644
--- a/posix/Makefile
+++ b/posix/Makefile
@@ -87,7 +87,7 @@ tests := tstgetopt testfnm runtests runptests \
bug-getopt1 bug-getopt2 bug-getopt3 bug-getopt4 \
bug-getopt5 tst-getopt_long1 bug-regex34 bug-regex35 \
tst-pathconf tst-getaddrinfo4 tst-rxspencer-no-utf8 \
- tst-fnmatch3
+ tst-fnmatch3 bug-regex36
xtests := bug-ga2
ifeq (yes,$(build-shared))
test-srcs := globtest
@@ -113,7 +113,7 @@ generated += $(addprefix wordexp-test-result, 1 2 3 4 5 6 7 8 9 10) \
tst-boost.mtrace bug-ga2.mtrace bug-ga2-mem.out \
bug-glob2.mtrace bug-glob2-mem.out tst-vfork3-mem.out \
tst-vfork3.mtrace getconf.speclist tst-fnmatch-mem.out \
- tst-fnmatch.mtrace
+ tst-fnmatch.mtrace bug-regex36.mtrace
ifeq ($(run-built-tests),yes)
ifeq (yes,$(build-shared))
@@ -130,7 +130,7 @@ tests-special += $(objpfx)bug-regex2-mem.out $(objpfx)bug-regex14-mem.out \
$(objpfx)tst-rxspencer-no-utf8-mem.out $(objpfx)tst-pcre-mem.out \
$(objpfx)tst-boost-mem.out $(objpfx)tst-getconf.out \
$(objpfx)bug-glob2-mem.out $(objpfx)tst-vfork3-mem.out \
- $(objpfx)tst-fnmatch-mem.out
+ $(objpfx)tst-fnmatch-mem.out $(objpfx)bug-regex36-mem.out
xtests-special += $(objpfx)bug-ga2-mem.out
endif
@@ -260,6 +260,12 @@ $(objpfx)bug-regex31-mem.out: $(objpfx)bug-regex31.out
$(common-objpfx)malloc/mtrace $(objpfx)bug-regex31.mtrace > $@; \
$(evaluate-test)
+bug-regex36-ENV = MALLOC_TRACE=$(objpfx)bug-regex36.mtrace
+
+$(objpfx)bug-regex36-mem.out: $(objpfx)bug-regex36.out
+ $(common-objpfx)malloc/mtrace $(objpfx)bug-regex36.mtrace > $@; \
+ $(evaluate-test)
+
tst-vfork3-ENV = MALLOC_TRACE=$(objpfx)tst-vfork3.mtrace
$(objpfx)tst-vfork3-mem.out: $(objpfx)tst-vfork3.out
diff --git a/posix/bug-regex36.c b/posix/bug-regex36.c
new file mode 100644
index 0000000..3dda026
--- /dev/null
+++ b/posix/bug-regex36.c
@@ -0,0 +1,29 @@
+/* Test regcomp not leaking memory on invalid repetition operator
+ Copyright (C) 2014 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/>. */
+
+#include <mcheck.h>
+#include <regex.h>
+
+int
+main (int argc, char **argv)
+{
+ regex_t r;
+ mtrace ();
+ regcomp (&r, "[a]\\{-2,}", 0);
+ regfree (&r);
+}
diff --git a/posix/regcomp.c b/posix/regcomp.c
index 921d0f4..a5020be 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -2415,14 +2415,21 @@ parse_expression (re_string_t *regexp, regex_t *preg, re_token_t *token,
while (token->type == OP_DUP_ASTERISK || token->type == OP_DUP_PLUS
|| token->type == OP_DUP_QUESTION || token->type == OP_OPEN_DUP_NUM)
{
- tree = parse_dup_op (tree, regexp, dfa, token, syntax, err);
- if (BE (*err != REG_NOERROR && tree == NULL, 0))
- return NULL;
+ bin_tree_t *dup_tree = parse_dup_op (tree, regexp, dfa, token, syntax, err);
+ if (BE (*err != REG_NOERROR && dup_tree == NULL, 0))
+ {
+ if (tree != NULL)
+ postorder (tree, free_tree, NULL);
+ return NULL;
+ }
+ tree = dup_tree;
/* In BRE consecutive duplications are not allowed. */
if ((syntax & RE_CONTEXT_INVALID_DUP)
&& (token->type == OP_DUP_ASTERISK
|| token->type == OP_OPEN_DUP_NUM))
{
+ if (tree != NULL)
+ postorder (tree, free_tree, NULL);
*err = REG_BADRPT;
return NULL;
}