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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 0D5A8CA9EA0 for ; Fri, 25 Oct 2019 08:27:10 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D21B320684 for ; Fri, 25 Oct 2019 08:27:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D21B320684 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 766F26B0007; Fri, 25 Oct 2019 04:27:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6F10C6B0008; Fri, 25 Oct 2019 04:27:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 590B96B000A; Fri, 25 Oct 2019 04:27:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0199.hostedemail.com [216.40.44.199]) by kanga.kvack.org (Postfix) with ESMTP id 3239A6B0007 for ; Fri, 25 Oct 2019 04:27:09 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 9B5408249980 for ; Fri, 25 Oct 2019 08:27:08 +0000 (UTC) X-FDA: 76081626936.24.drug58_41e6cfbfd904 X-HE-Tag: drug58_41e6cfbfd904 X-Filterd-Recvd-Size: 4790 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Fri, 25 Oct 2019 08:27:08 +0000 (UTC) Received: by mail-il1-f197.google.com with SMTP id y7so1588296ilb.3 for ; Fri, 25 Oct 2019 01:27:08 -0700 (PDT) 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=2Z+vWF41GYXH8//3OQ+PBbYTPKapgaj+4O6q+OjV10U=; b=M/fuPxPugHTFL4mGevQF0ybyeYnONcrsFGvo64QtpMMr4QhK9e4gkR/xWqzBElO7lE AZaNJgRvM9Cauk3WqCEya9IwJZ16cg95ULDXJ4SiAX1LnCf9NM/fdrsBwcObC9uaR8LO ybTypatKqDYjtZAfHt8Lwy9tMnn5CsvSxyh19i3jI7bks3LUcNInA4NaYKQOV7Bg+8Bq pTokavxWbKqYhl0ef/62AkIARTVBgrGxwhBUYUVL90XMaBfYQcVfgQx0oRVb2D3/7hlN rHOJ/kcVkugoYWio95K2r2JLSjEk3jyVtCT/X7bcnbdLbZVCZvzPSU0dX5pkf2cnvcVC YIMg== X-Gm-Message-State: APjAAAViTxMEJ+nchfzDGq66r/UeGkDFJI0wcvXH/c7YNDBkhmnY36Io Zk4pokdD1n5TW7R52E7uXunlyaASpIQh6cO4iQ3wLbBgOXuQ X-Google-Smtp-Source: APXvYqxSDwW6Tww3QwRy3e0hO/R9Au/K6Msz+XoPEzW0Senw0ypG/StxAOnzFDLiy4k24SsIAdrUvpSDKNBCgillkV5oQkEAttJH MIME-Version: 1.0 X-Received: by 2002:a92:1907:: with SMTP id 7mr2888673ilz.72.1571992027666; Fri, 25 Oct 2019 01:27:07 -0700 (PDT) Date: Fri, 25 Oct 2019 01:27:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000066214a0595b7ea86@google.com> Subject: WARNING in collapse_file From: syzbot To: akpm@linux-foundation.org, hughd@google.com, jglisse@redhat.com, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following crash on: HEAD commit: a6fcdcd9 Add linux-next specific files for 20191021 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11145ed8e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=32434321999f01e9 dashboard link: https://syzkaller.appspot.com/bug?extid=742a9c5d4ab05d343c49 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+742a9c5d4ab05d343c49@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1080 at mm/khugepaged.c:1643 collapse_file+0x1f9d/0x4170 mm/khugepaged.c:1643 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 1080 Comm: khugepaged Not tainted 5.4.0-rc4-next-20191021 #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+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 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:collapse_file+0x1f9d/0x4170 mm/khugepaged.c:1643 Code: a1 c0 ff 31 c9 ba 01 00 00 00 4c 89 fe 48 8b bd c0 fe ff ff e8 e4 e9 ec ff e9 b4 fd ff ff 4c 8b bd 88 fe ff ff e8 93 a1 c0 ff <0f> 0b 4c 8b a3 50 ff ff ff c7 85 80 fe ff ff 00 00 00 00 e9 05 f6 RSP: 0018:ffff8880a7e57ad0 EFLAGS: 00010293 RAX: ffff8880a7e74440 RBX: ffff8880a7e57c88 RCX: ffffffff81b2a998 RDX: 0000000000000000 RSI: ffffffff81b2acbd RDI: 0000000000000001 RBP: ffff8880a7e57cb0 R08: ffff8880a7e74440 R09: fffff940004730b1 R10: fffff940004730b0 R11: ffffea0002398587 R12: 0000000000000001 R13: ffffea0002ffa848 R14: 0000000000000000 R15: ffffea0002230000 khugepaged_scan_file mm/khugepaged.c:1881 [inline] khugepaged_scan_mm_slot mm/khugepaged.c:1979 [inline] khugepaged_do_scan mm/khugepaged.c:2063 [inline] khugepaged+0x2da9/0x4360 mm/khugepaged.c:2108 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.