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=unavailable 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 E2997C432C0 for ; Mon, 2 Dec 2019 17:27:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B923A2073C for ; Mon, 2 Dec 2019 17:27:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727715AbfLBR1K (ORCPT ); Mon, 2 Dec 2019 12:27:10 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:49534 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727542AbfLBR1K (ORCPT ); Mon, 2 Dec 2019 12:27:10 -0500 Received: by mail-il1-f200.google.com with SMTP id t13so256447ilk.16 for ; Mon, 02 Dec 2019 09:27:09 -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=TtI8iuODHAY3u2DEuOOaACvhCMI2l1BthLHP25nKwao=; b=deSAj1uWVKig3tJ2Xj4e1f002fTiLpZqzUt2VU6tHqND+njYhSS2eyDY68jYV0PGYg kZ/4fd7qBiZ6oAWGtSQvQyb3hlAHJw4CYcfHJ8t2trTxWsentOE7dtH3cBjRlCD9fHQx +bAeaiMJAdQd09/C1nV3+FZN2P+gXuxyBoXNRH75QmCrDncR8g2b2w8I4YCwQFUih0iE ZZPyORiZJOZa0YXDybzpURnlSPg2HWwnuon3un9reX0lFbya2H/HC4EF88SA/mLlKEZJ p+2LUgD0Cixf7IeDoV30d2HOsWuVRPJfsB5SAsetwZ4sXFxm3KKXK2571UFWKudAfjaf W9rw== X-Gm-Message-State: APjAAAWY5VhcimxGMWgEisvqQekxGUVgc3I2sMjEnPNnijZY4VhcN279 Fvd73KoZwQfYNhfc9uVY461XFu6M+ztTb8VaEu4t2qmUdueG X-Google-Smtp-Source: APXvYqzUBK8l/nEEBz5DGClMhxGuP7KONlyXZ38j9ZDhKJcotxY5eRC7fYZQz1ryOHK1m0i9QwHV21qsGAKHHh0jtTCyTH+SHdUH MIME-Version: 1.0 X-Received: by 2002:a5d:9f05:: with SMTP id q5mr6659087iot.295.1575307629224; Mon, 02 Dec 2019 09:27:09 -0800 (PST) Date: Mon, 02 Dec 2019 09:27:09 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a6f2030598bbe38c@google.com> Subject: WARNING in wp_page_copy From: syzbot To: davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: a6ed68d6 Merge tag 'drm-next-2019-11-27' of git://anongit... git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1181e536e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=6349516b24252b37 dashboard link: https://syzkaller.appspot.com/bug?extid=9301f2f33873407d5b33 compiler: gcc (GCC) 9.0.0 20181231 (experimental) 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+9301f2f33873407d5b33@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 22897 at mm/memory.c:2223 cow_user_page mm/memory.c:2223 [inline] WARNING: CPU: 0 PID: 22897 at mm/memory.c:2223 wp_page_copy+0x123c/0x1860 mm/memory.c:2393 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 22897 Comm: syz-executor.4 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:cow_user_page mm/memory.c:2223 [inline] RIP: 0010:wp_page_copy+0x123c/0x1860 mm/memory.c:2393 Code: 4c 89 f7 ba 00 10 00 00 48 81 e6 00 f0 ff ff e8 7a 52 c0 05 31 ff 41 89 c7 89 c6 e8 be 9e d3 ff 45 85 ff 74 0f e8 34 9d d3 ff <0f> 0b 4c 89 f7 e8 aa 44 c0 05 e8 25 9d d3 ff 65 4c 8b 34 25 c0 1e RSP: 0018:ffff88806c99f8d0 EFLAGS: 00010202 RAX: 0000000000040000 RBX: ffff88806c99fb78 RCX: ffffc9000ed9c000 RDX: 0000000000000230 RSI: ffffffff81a0b77c RDI: 0000000000000005 RBP: ffff88806c99fa18 R08: ffff888068576680 R09: 0000000000000000 R10: ffffed100faee7ff R11: ffff88807d773fff R12: ffff88808a082420 R13: ffffea0001f5dcc0 R14: ffff88807d773000 R15: 0000000000001000 do_wp_page+0x543/0x15c0 mm/memory.c:2702 handle_pte_fault mm/memory.c:3939 [inline] __handle_mm_fault+0x23ec/0x4040 mm/memory.c:4047 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4084 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x536/0xd80 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1530 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0010:__put_user_4+0x1c/0x30 arch/x86/lib/putuser.S:70 Code: 1f 00 c3 90 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 1c 25 c0 1e 02 00 48 8b 9b 90 14 00 00 48 83 eb 03 48 39 d9 73 4a 0f 1f 00 <89> 01 31 c0 0f 1f 00 c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 65 48 RSP: 0018:ffff88806c99fe18 EFLAGS: 00010297 RAX: 0000000000000009 RBX: 00007fffffffeffd RCX: 0000000020003ac0 RDX: 0000000000000058 RSI: ffffffff81a08021 RDI: 0000000000000286 RBP: ffff88806c99fee0 R08: 0000000000000001 R09: ffff888068576f10 R10: fffffbfff13cf9e8 R11: ffffffff89e7cf47 R12: 0000000000000006 R13: 0000000000000009 R14: 000000000000000a R15: 0000000000000000 __do_sys_socketpair net/socket.c:1623 [inline] __se_sys_socketpair net/socket.c:1620 [inline] __x64_sys_socketpair+0x97/0xf0 net/socket.c:1620 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a679 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:00007f42bfff6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a679 RDX: 00000000000000be RSI: 0000000000000006 RDI: 0000000000000006 RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020003ac0 R11: 0000000000000246 R12: 00007f42bfff76d4 R13: 00000000004c9e66 R14: 00000000004e2240 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. 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