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Fix memory leak in regexp compiler (BZ #17069)

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This commit is contained in:
Andreas Schwab
2014-06-19 15:38:03 +02:00
parent 51a7380b89
commit 4d43ef1e74
4 changed files with 60 additions and 6 deletions
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13
posix/regcomp.c
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@@ -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;
}