From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 8C8163858D32; Wed, 12 Apr 2023 08:10:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8C8163858D32 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1681287010; bh=Hp9X9JgNqQia1E7KN5Cev3UB78wH4ykJ7iucY54ZpVE=; h=From:To:Subject:Date:In-Reply-To:References:From; b=YdSeeC7SsMCOQnyt1yR4jB8zKXij88KIGIP0VPsJMmJ4U6JJL6UxPTlwEE+Ni4+mU 9VCMkSYmwpkqcZUviIr5aJ/7JcMRBUR9vCf08585ggDPxQjdukCnZqWDcYsXE2W/+U grgcnGh5S6zuiJl1f4+vrgtH8h4H251IBUzqWlI4= From: "marxin at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/109446] Possible destination array overflow without diagnosis in memcpy Date: Wed, 12 Apr 2023 08:10:10 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: sanitizer X-Bugzilla-Version: 8.4.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: marxin at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109446 Martin Li=C5=A1ka changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rguenth at gcc dot gnu.org --- Comment #5 from Martin Li=C5=A1ka --- > It seems Clang disables this optimization and convert memcpy to > __asan_memcpy calls if -fsanitize=3Daddress used: >=20 > https://godbolt.org/z/dcfadoMYY Yep! Richi, do you know a place where we lower this?=