From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 8F20B3885503; Wed, 14 Dec 2022 18:17:22 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8F20B3885503 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1671041842; bh=vWkQISI7o16aqV01EAQJ+072M17RNpLkO12RHoOmGwQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=oC8QWwNmTDKIhv2wiIXPGJa2xZJf1E+0KsAa+dH7nLi231CFJcy6O40SLIYwnvtdI aCyMQJbL+ORoKYdEDTok15+g+Nalx41LG46q6LEenvTlX2zo6XnNKjNpS1c0v4G4MH yzq1l6P52f8CWzPP0l2wAPFCox74jUxsucClvBCw= From: "nars at yottadb dot com" To: glibc-bugs@sourceware.org Subject: [Bug libc/29863] Segmentation fault in memcmp-sse2.S if memory contents can concurrently change Date: Wed, 14 Dec 2022 18:17:21 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: glibc X-Bugzilla-Component: libc X-Bugzilla-Version: 2.36 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nars at yottadb dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://sourceware.org/bugzilla/show_bug.cgi?id=3D29863 --- Comment #18 from Narayanan Iyer --- (In reply to Narayanan Iyer from comment #17) >=20 > Thank you very much for the prompt fix. >=20 > I will try to verify this in my system using the LD_PRELOAD trick you > mentioned. I tried compiling just memcmp-sse2.S but encountered issues. So went ahead = and rebuilt the full glibc without and with your fix. And verified that without your fix, the test program crashed reliably whereas with your fix the test program ran fine all the time. --=20 You are receiving this mail because: You are on the CC list for the bug.=