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regexec.c: avoid overflow in realloc buffer length computation

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Paul Eggert
2010-01-22 12:41:12 -08:00
committed by Ulrich Drepper
parent 74bc9f14db
commit aef699dce1
2 changed files with 8 additions and 0 deletions
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4
posix/regexec.c
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@ -4104,6 +4104,10 @@ extend_buffers (re_match_context_t *mctx)
reg_errcode_t ret;
re_string_t *pstr = &mctx->input;
/* Avoid overflow. */
if (BE (INT_MAX / 2 / sizeof (re_dfastate_t *) <= pstr->bufs_len, 0))
return REG_ESPACE;
/* Double the lengthes of the buffers. */
ret = re_string_realloc_buffers (pstr, pstr->bufs_len * 2);
if (BE (ret != REG_NOERROR, 0))