From owner-dev-commits-src-main@freebsd.org Tue Jul 6 13:29:27 2021 Return-Path: Delivered-To: dev-commits-src-main@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B868E6571BE; Tue, 6 Jul 2021 13:29:27 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GK3Lb4kyzz4jjw; Tue, 6 Jul 2021 13:29:27 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 86B4B1A702; Tue, 6 Jul 2021 13:29:27 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 166DTRxh084356; Tue, 6 Jul 2021 13:29:27 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 166DTRNj084355; Tue, 6 Jul 2021 13:29:27 GMT (envelope-from git) Date: Tue, 6 Jul 2021 13:29:27 GMT Message-Id: <202107061329.166DTRNj084355@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Alex Richardson Subject: git: c78f449d85e0 - main - usr.bin/diff: fix UBSan error in readhash MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: arichardson X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: c78f449d85e0b292fe5d942cca99f11c1cd430fa Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Jul 2021 13:29:27 -0000 The branch main has been updated by arichardson: URL: https://cgit.FreeBSD.org/src/commit/?id=c78f449d85e0b292fe5d942cca99f11c1cd430fa commit c78f449d85e0b292fe5d942cca99f11c1cd430fa Author: Alex Richardson AuthorDate: 2021-07-06 11:16:40 +0000 Commit: Alex Richardson CommitDate: 2021-07-06 11:16:40 +0000 usr.bin/diff: fix UBSan error in readhash UBSan complains about the `sum = sum * 127 + chrtran(t);` line below since that can overflow an `int`. Use `unsigned int` instead to ensure that overflow is well-defined. Reviewed By: imp MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D31075 --- usr.bin/diff/diffreg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/usr.bin/diff/diffreg.c b/usr.bin/diff/diffreg.c index 1b28281024c6..651ec88df909 100644 --- a/usr.bin/diff/diffreg.c +++ b/usr.bin/diff/diffreg.c @@ -1345,7 +1345,7 @@ static int readhash(FILE *f, int flags) { int i, t, space; - int sum; + unsigned sum; sum = 1; space = 0;