public inbox for glibc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "goldstein.w.n at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/28755] New: overflow bug in wcsncmp_avx2 and wcsncmp_evex
Date: Sun, 09 Jan 2022 10:30:11 +0000 [thread overview]
Message-ID: <bug-28755-131@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=28755
Bug ID: 28755
Summary: overflow bug in wcsncmp_avx2 and wcsncmp_evex
Product: glibc
Version: 2.34
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: string
Assignee: unassigned at sourceware dot org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
Similiar to [BZ 27974](https://sourceware.org/bugzilla/show_bug.cgi?id=27974).
The multiply of length by sizeof (wchar_t) can overflow if length is >= 2^62
which can lead to incorrect results.
For example:
#include <wchar.h>
int
main(int argc, char ** argv) {
assert(__wcsncmp_evex(L"abc", L"abd", (1UL << 62)) != 0);
assert(__wcsncmp_avx2(L"abc", L"abd", (1UL << 62)) != 0);
}
Will fail on either assert.
--
You are receiving this mail because:
You are on the CC list for the bug.
next reply other threads:[~2022-01-09 10:30 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-09 10:30 goldstein.w.n at gmail dot com [this message]
2022-01-09 14:07 ` [Bug string/28755] " hjl.tools at gmail dot com
2022-01-10 0:29 ` goldstein.w.n at gmail dot com
2022-01-11 3:07 ` goldstein.w.n at gmail dot com
2022-01-27 4:24 ` cvs-commit at gcc dot gnu.org
2022-01-27 4:58 ` cvs-commit at gcc dot gnu.org
2022-01-27 13:14 ` cvs-commit at gcc dot gnu.org
2022-01-27 13:29 ` cvs-commit at gcc dot gnu.org
2022-01-27 13:33 ` cvs-commit at gcc dot gnu.org
2022-01-27 15:28 ` cvs-commit at gcc dot gnu.org
2022-01-27 16:12 ` cvs-commit at gcc dot gnu.org
2022-01-27 16:14 ` hjl.tools at gmail dot com
2022-02-17 19:04 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:14 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:22 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:27 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:32 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:40 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:43 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:48 ` cvs-commit at gcc dot gnu.org
2022-02-17 19:52 ` cvs-commit at gcc dot gnu.org
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-28755-131@http.sourceware.org/bugzilla/ \
--to=sourceware-bugzilla@sourceware.org \
--cc=glibc-bugs@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).