From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09453C32771 for ; Thu, 16 Jan 2020 01:43:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D86B720723 for ; Thu, 16 Jan 2020 01:43:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730223AbgAPBnM (ORCPT ); Wed, 15 Jan 2020 20:43:12 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:50810 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729615AbgAPBnL (ORCPT ); Wed, 15 Jan 2020 20:43:11 -0500 Received: by mail-io1-f72.google.com with SMTP id e13so11607933iob.17 for ; Wed, 15 Jan 2020 17:43:11 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=pU+hl6DQtUVqquHBvUG4AoVSnPVgpA2g4GQSgo/iOTk=; b=RkPCu0gvr+4MkUQaga7V5GRZU3dn/3e63o/5nUgBnawnPR0C66OaKW4QjWBXiR/5Kl 6WNZ9mlkyEq0Ax6A9LYJ15XjYDTLU55fKdGKRgGQPV/9D2gskmuoLZm0ybxGw6PkdnO4 WLNpOgsyzO0zaobhtyzEUUxXtZvIjkjjHbKBFIXhSb8Ys9F9IlIN78BptH9Ykg/IVBIO 7WpDbiVFuMZGAO91WZjOZi8nP2jaYzX8ATB/y6QsYipg+hGue7vcVnCA/Posu9VUL6v5 GOJDpvfqfkWtlMX5d05Q47NNY8GI+Va5FckxdaF6wIb8KcBpvga+L2n7wcQPP/A92wNs m7fg== X-Gm-Message-State: APjAAAUWmJ0jehrWPUkI1f7T2AqMgj9Yl+8Qtbhxc3dA0O+5QgqoGklX oYESTLfu8XcS8KbHWwsiPbRL0wHYs/rmxlgueP2kpVvyivsv X-Google-Smtp-Source: APXvYqz8ExHWuxGQb4AmA+nA6X6PodKsUo+BozZEdaPxl0l2wKwGqlShFzpKA0ULAH+CjvHgZZIY2hIT2gdduJYf8fFx75M/oM1x MIME-Version: 1.0 X-Received: by 2002:a02:cdcb:: with SMTP id m11mr26685012jap.125.1579138990672; Wed, 15 Jan 2020 17:43:10 -0800 (PST) Date: Wed, 15 Jan 2020 17:43:10 -0800 In-Reply-To: <000000000000e45b52059ba1d3b9@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000971018059c37f223@google.com> Subject: Re: BUG: unable to handle kernel paging request in csi_J From: syzbot To: daniel.vetter@ffwll.ch, ghalat@redhat.com, gregkh@linuxfoundation.org, jslaby@suse.com, linux-kernel@vger.kernel.org, nico@fluxnic.net, sam@ravnborg.org, syzkaller-bugs@googlegroups.com, textshell@uchuujin.de Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 51d69817 Merge tag 'platform-drivers-x86-v5.5-3' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=145bfa59e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfbb8fa33f49f9f3 dashboard link: https://syzkaller.appspot.com/bug?extid=3f1750a5249afd5d7d2d compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10d23421e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=166ef33ee00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3f1750a5249afd5d7d2d@syzkaller.appspotmail.com BUG: unable to handle page fault for address: 000000010000000e #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 9e8e1067 P4D 9e8e1067 PUD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8751 Comm: syz-executor043 Not tainted 5.5.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memset16 arch/x86/include/asm/string_64.h:25 [inline] RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline] RIP: 0010:csi_J+0x6c7/0xa80 drivers/tty/vt/vt.c:1529 Code: 3b 49 8d 9e c8 03 00 00 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 53 01 00 00 0f b7 03 44 89 e1 81 e1 ff ff ff 7f 4c 89 ff 66 ab 48 c7 c3 5c 8f 44 89 48 c7 c7 5c 8f 44 89 be 04 00 00 00 RSP: 0018:ffffc90001ee7830 EFLAGS: 00010202 RAX: 0000000000000720 RBX: ffff8880a7cb73c8 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000010000000e RBP: ffffc90001ee7870 R08: ffffffff83f954a1 R09: ffffffff83f9522d R10: ffff88808f1a81c0 R11: 0000000000000004 R12: 7fffffff80000001 R13: dffffc0000000000 R14: ffff8880a7cb7000 R15: 000000010000000e FS: 00000000018af880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000010000000e CR3: 00000000a3c14000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_con_trol drivers/tty/vt/vt.c:2367 [inline] do_con_write+0x7183/0xf360 drivers/tty/vt/vt.c:2797 con_write+0x25/0x40 drivers/tty/vt/vt.c:3135 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0xd0c/0x1200 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x5a1/0x950 drivers/tty/tty_io.c:1046 __vfs_write+0xb8/0x740 fs/read_write.c:494 vfs_write+0x270/0x580 fs/read_write.c:558 ksys_write+0x117/0x220 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:620 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4404f9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe37f8e118 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: 000000010000000e ---[ end trace 0426c9c4e025bc85 ]--- RIP: 0010:memset16 arch/x86/include/asm/string_64.h:25 [inline] RIP: 0010:scr_memsetw include/linux/vt_buffer.h:36 [inline] RIP: 0010:csi_J+0x6c7/0xa80 drivers/tty/vt/vt.c:1529 Code: 3b 49 8d 9e c8 03 00 00 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 53 01 00 00 0f b7 03 44 89 e1 81 e1 ff ff ff 7f 4c 89 ff 66 ab 48 c7 c3 5c 8f 44 89 48 c7 c7 5c 8f 44 89 be 04 00 00 00 RSP: 0018:ffffc90001ee7830 EFLAGS: 00010202 RAX: 0000000000000720 RBX: ffff8880a7cb73c8 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000010000000e RBP: ffffc90001ee7870 R08: ffffffff83f954a1 R09: ffffffff83f9522d R10: ffff88808f1a81c0 R11: 0000000000000004 R12: 7fffffff80000001 R13: dffffc0000000000 R14: ffff8880a7cb7000 R15: 000000010000000e FS: 00000000018af880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000010000000e CR3: 00000000a3c14000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400