GNU bug report logs - #23983
[PATCH] grep: fix crash with a pattern of alternation of two same characters

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Package: grep;

Reported by: Norihiro Tanaka <noritnk <at> kcn.ne.jp>

Date: Thu, 14 Jul 2016 15:08:01 UTC

Severity: normal

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Norihiro Tanaka <noritnk <at> kcn.ne.jp>
To: <bug-grep <at> gnu.org>
Subject: [PATCH] grep: fix crash with a pattern of alternation of two same
 characters
Date: Fri, 15 Jul 2016 00:07:13 +0900

[Message part 1 (text/plain, inline)]
Current master crashes with below.

$ printf '0\n0' >pat
$ printf '0\n' >in
$ env LC_ALL=C grep -F pat in

grep -F uses memchr2() for each character in this pattern, but if two
characters is same, the trie has no child.

[0001-grep-fix-crash-with-a-pattern-of-alternation-of-two-.patch (text/plain, attachment)]
This bug report was last modified 8 years and 364 days ago.

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