Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DFA36C678D5 for ; Sat, 4 Mar 2023 04:36:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229633AbjCDEgU (ORCPT ); Fri, 3 Mar 2023 23:36:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229509AbjCDEgR (ORCPT ); Fri, 3 Mar 2023 23:36:17 -0500 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3D511ABFF for ; Fri, 3 Mar 2023 20:36:16 -0800 (PST) Received: by mail-il1-f197.google.com with SMTP id l1-20020a056e021c0100b003180af2a284so2449792ilh.1 for ; Fri, 03 Mar 2023 20:36:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=qBM8f3nfkQPiCUxCkC/1jIKN/CSWO63Mv0FZdwLHa7w=; b=j0cuNJmWIiTGrKAJqKiQT0KI30F8tBqegsmpEnFMM9iGlOb87+Xa68Xsnf49zAAz4V 0bMKOz/gExEOT+sWGIAZhA/c70xUp1e+owqmViLg5Dgbc3O5kt/ifJbwWVU/cES7IQG+ QkgetaYNt7cVGOPbJ0rCWOwBN5s8g2i+Xtv9XujcGjRrVfTII8xUfUj+eGEUzPw3a88B 66vgsIm5WwCL3cdEi3PWQwN0V5qCAiJayC7RZvMtHrenM+5/O35HbkGIgts2uGFc1CQZ xUFpww1S5qFTS+PJBfTGqy5uvDKJWg8b/RlBZq8IEJSMeHUCEgm7Up0NkWjUK1ALZmTb cLJQ== X-Gm-Message-State: AO0yUKUs21/2cnbfPWdpb8LcOm8ng+Ns+eJHJ/vK1jZj+mE0OUtvglLq cF3xWzyReMX1uMAFsFHngUiiz5m99zXLPrtgVm/7XbewDf3c X-Google-Smtp-Source: AK7set9ivc7a0hTa59+MlzQADnVR9rVesqaUQ/nvWX6Tgg9CYI6nEEqLldZZLLoEwGD8VgHEij9xXEv9mpDaSxPxdEDomAm6DdMV MIME-Version: 1.0 X-Received: by 2002:a02:94cd:0:b0:3e1:fb3d:4dce with SMTP id x71-20020a0294cd000000b003e1fb3d4dcemr1851215jah.0.1677904576128; Fri, 03 Mar 2023 20:36:16 -0800 (PST) Date: Fri, 03 Mar 2023 20:36:16 -0800 In-Reply-To: <0000000000001d1fb505f605c295@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003a2e5e05f60b9aff@google.com> Subject: Re: [syzbot] [hardening?] [mm?] BUG: bad usercopy in con_font_op From: syzbot To: akpm@linux-foundation.org, daniel@ffwll.ch, deller@gmx.de, dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org, jirislaby@kernel.org, keescook@chromium.org, linux-fbdev@vger.kernel.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, samuel.thibault@ens-lyon.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 24d69384bcd34b9dcaf5dab744bf7096e84d1abd Author: Samuel Thibault Date: Thu Jan 19 15:19:16 2023 +0000 VT: Add KD_FONT_OP_SET/GET_TALL operations bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=120b3232c80000 start commit: 2eb29d59ddf0 Merge tag 'drm-next-2023-03-03-1' of git://an.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=110b3232c80000 console output: https://syzkaller.appspot.com/x/log.txt?x=160b3232c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=cab35c936731a347 dashboard link: https://syzkaller.appspot.com/bug?extid=3af17071816b61e807ed syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b71504c80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f02d9cc80000 Reported-by: syzbot+3af17071816b61e807ed@syzkaller.appspotmail.com Fixes: 24d69384bcd3 ("VT: Add KD_FONT_OP_SET/GET_TALL operations") For information about bisection process see: https://goo.gl/tpsmEJ#bisection