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fix crash in regexec for nonzero nmatch argument with REG_NOSUB

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per POSIX, the nmatch and pmatch arguments are ignored when the regex
was compiled with REG_NOSUB.
This commit is contained in:
Rich Felker
2014-07-17 19:56:27 -04:00
parent a6adb2bcd8
commit 72ed3d47e5
1 changed files with 1 additions and 0 deletions
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src/regex/regexec.c
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@ -983,6 +983,7 @@ regexec(const regex_t *restrict preg, const char *restrict string,
tre_tnfa_t *tnfa = (void *)preg->TRE_REGEX_T_FIELD; tre_tnfa_t *tnfa = (void *)preg->TRE_REGEX_T_FIELD;
reg_errcode_t status; reg_errcode_t status;
int *tags = NULL, eo; int *tags = NULL, eo;
if (tnfa->cflags & REG_NOSUB) nmatch = 0;
if (tnfa->num_tags > 0 && nmatch > 0) if (tnfa->num_tags > 0 && nmatch > 0)
{ {
tags = xmalloc(sizeof(*tags) * tnfa->num_tags); tags = xmalloc(sizeof(*tags) * tnfa->num_tags);