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regexec.c: avoid overflow in computing sum of lengths

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Paul Eggert 2010-01-22 12:22:18 -08:00 committed by Ulrich Drepper
parent eadc09f22c
commit 42a2c9b5c3
2 changed files with 5 additions and 1 deletions
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ChangeLog
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@ -1,5 +1,9 @@
2010-01-22 Jim Meyering <jim@meyering.net>
[BZ #11191]
* posix/regexec.c (re_search_2_stub): Check for overflow
when adding the sizes of the two strings.
[BZ #11190]
* posix/regexec.c (re_search_internal): Avoid overflow
in computing re_malloc buffer size.

2
posix/regexec.c
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@ -370,7 +370,7 @@ re_search_2_stub (bufp, string1, length1, string2, length2, start, range, regs,
int len = length1 + length2;
char *s = NULL;
if (BE (length1 < 0 || length2 < 0 || stop < 0, 0))
if (BE (length1 < 0 || length2 < 0 || stop < 0 || len < length1, 0))
return -2;
/* Concatenate the strings. */