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 E0483C33CB1 for ; Thu, 16 Jan 2020 05:59:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B68AF20748 for ; Thu, 16 Jan 2020 05:59:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729369AbgAPF7K (ORCPT ); Thu, 16 Jan 2020 00:59:10 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:36532 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726366AbgAPF7J (ORCPT ); Thu, 16 Jan 2020 00:59:09 -0500 Received: by mail-il1-f198.google.com with SMTP id t2so15369462ilp.3 for ; Wed, 15 Jan 2020 21:59:09 -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:message-id:subject:from:to; bh=Mvdn3qJwQ8zIspPo4yhX0MPJHSydaEstgFomVGSlOE0=; b=b99hVed3V8cfJ+RcQlE3zU3QOnF6+kgPGqO8f5nzlBo23Rb1Cv7ds6FiybBvxj9Do8 pfXg2TTSxPP6hpjPbLtsUhG7g2ptUfoiS4bPVnOU2Jm+hHGYeiPxKhbwTvDspo9oHyc1 YRkEZ/n4eSaUBtHKBFFXG9y4g1z9UH8AYFyZAwbyZKaIe6HOH7HrysKtA5rQ1cjDBKF2 LQlU0161J3/kWf2PlgmGAUcAroYMNBYHiD3NCh2WpTLR0k111PZH62pPyAS2BroFlqC2 fV8dAoZgW59cG6hZ/gMnZ58BkKH7W3d4d7pUYlfiqIRSzKEleWrih35BLc0LSn578Ycc AG2g== X-Gm-Message-State: APjAAAUtrR2pUFYrC/whMOxtlFPgDDRXLjWMzAg9VcqLZ20XMWHC7jY0 xuudJCNm1Ugusi8L/+D+MGh+iaoOrpN5zSYWTyRw7JXmCS17 X-Google-Smtp-Source: APXvYqxwQG6FA5969kzguYeLe/O6wnjEzqb+toFTmCJY+RvcGrC9EAKlPaHJTbm4gkIEjpPuN7V4Xc8wcb72xSXiWkpM4rzyh4jc MIME-Version: 1.0 X-Received: by 2002:a92:cd02:: with SMTP id z2mr2177423iln.286.1579154349083; Wed, 15 Jan 2020 21:59:09 -0800 (PST) Date: Wed, 15 Jan 2020 21:59:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000005d2bf059c3b86ac@google.com> Subject: BUG: unable to handle kernel paging request in do_con_write 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 Hello, syzbot found 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=15a41c76e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfbb8fa33f49f9f3 dashboard link: https://syzkaller.appspot.com/bug?extid=d8cbeb7028cd2950172e compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+d8cbeb7028cd2950172e@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffffffff0000000e #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 9070067 P4D 9070067 PUD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 1 PID: 25087 Comm: syz-executor.4 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:delete_char drivers/tty/vt/vt.c:853 [inline] RIP: 0010:csi_P drivers/tty/vt/vt.c:1985 [inline] RIP: 0010:do_con_trol drivers/tty/vt/vt.c:2379 [inline] RIP: 0010:do_con_write+0x9565/0xf360 drivers/tty/vt/vt.c:2797 Code: 00 00 00 00 fc ff df 8a 04 08 84 c0 0f 85 60 4b 00 00 48 8b 84 24 a0 00 00 00 0f b7 00 41 81 e4 ff ff ff 7f 4c 89 e1 48 89 df 66 ab 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 50 8a 04 01 84 RSP: 0018:ffffc900019e7880 EFLAGS: 00010202 RAX: 0000000000000720 RBX: ffffffff0000000e RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000100000010 RDI: ffffffff0000000e RBP: ffffc900019e7b68 R08: ffffffff83fa0511 R09: ffffffff83f9de70 R10: ffff8880a14b0180 R11: 000000000000001c R12: 0000000000000001 R13: 0000000000000000 R14: 0000000100000010 R15: 0000000000000002 FS: 00007f9510ce8700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff0000000e CR3: 000000009570c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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: 0033:0x45aff9 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9510ce7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f9510ce86d4 RCX: 000000000045aff9 RDX: 0000000000000320 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000c60 R14: 00000000004cd0b9 R15: 000000000075bf2c Modules linked in: CR2: ffffffff0000000e ---[ end trace 0cf51c4bf0974ba5 ]--- 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:delete_char drivers/tty/vt/vt.c:853 [inline] RIP: 0010:csi_P drivers/tty/vt/vt.c:1985 [inline] RIP: 0010:do_con_trol drivers/tty/vt/vt.c:2379 [inline] RIP: 0010:do_con_write+0x9565/0xf360 drivers/tty/vt/vt.c:2797 Code: 00 00 00 00 fc ff df 8a 04 08 84 c0 0f 85 60 4b 00 00 48 8b 84 24 a0 00 00 00 0f b7 00 41 81 e4 ff ff ff 7f 4c 89 e1 48 89 df 66 ab 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 50 8a 04 01 84 RSP: 0018:ffffc900019e7880 EFLAGS: 00010202 RAX: 0000000000000720 RBX: ffffffff0000000e RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000100000010 RDI: ffffffff0000000e RBP: ffffc900019e7b68 R08: ffffffff83fa0511 R09: ffffffff83f9de70 R10: ffff8880a14b0180 R11: 000000000000001c R12: 0000000000000001 R13: 0000000000000000 R14: 0000000100000010 R15: 0000000000000002 FS: 00007f9510ce8700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff0000000e CR3: 000000009570c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.