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Fixed bug#58026 - massive recursion and crash in regular expression

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handling.

The problem was that parsing of nested regular expression involved
recursive calls. Such recursion didn't take into account the amount of
available stack space, which ended up leading to stack overflow crashes.
This commit is contained in:
Dmitry Shulga
2011-02-04 10:47:46 +06:00
parent 63a40fe65c
commit 6c777a6220
6 changed files with 53 additions and 5 deletions
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4
regex/my_regex.h
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@ -28,6 +28,7 @@ typedef struct {
/* === regcomp.c === */
typedef int (*my_regex_stack_check_t)();
extern int my_regcomp(my_regex_t *, const char *, int, CHARSET_INFO *charset);
#define REG_BASIC 0000
#define REG_EXTENDED 0001
@ -76,7 +77,8 @@ extern void my_regfree(my_regex_t *);
/* === reginit.c === */
extern void my_regex_init(CHARSET_INFO *cs); /* Should be called for multithread progs */
/* Should be called for multithread progs */
extern void my_regex_init(CHARSET_INFO *cs, my_regex_stack_check_t func);
extern void my_regex_end(void); /* If one wants a clean end */
#ifdef __cplusplus