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_PASS,URIBL_BLOCKED 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 42E4BC433F4 for ; Tue, 18 Sep 2018 14:56:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D69C221471 for ; Tue, 18 Sep 2018 14:56:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D69C221471 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729865AbeIRU3B (ORCPT ); Tue, 18 Sep 2018 16:29:01 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:39198 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728631AbeIRU3B (ORCPT ); Tue, 18 Sep 2018 16:29:01 -0400 Received: by mail-io1-f69.google.com with SMTP id x5-v6so2392078ioa.6 for ; Tue, 18 Sep 2018 07:56:03 -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=of4iIq8p5WPq10biYqf43LSKCVhopMp7hvZZ+hxigJI=; b=gQeXzlwNYysrGNwGFk9Ox9pV3YRRClbNszfDYOl3E9E5iWStIDj4HK1LMUfMa+lKYU aNLFmHe3Po6D1sZ46jWfhVKueucjtqJiA9w+WqjFldfXdnfwGFO0N4wUBM0aZtHns3z+ huPQhx3zy053Gfh8rlP100OPElLi+p8GArhPTvwMRBknkLR9BYRGKe3T2YJ4d31IrXEn hX5kvTbbs47CQcfL8yDfSyncLlfRqDGKXLCuIde99N2V6FauMia8xvnWOqNA0eMRMckV tzpGYQEFr0eLpUhcJvLKFySvJh9aUriTC9ho0P0O1BHX25Scgopqwgg6M7YK9k1f5w/J xgzw== X-Gm-Message-State: APzg51CuhqhMYcPUz7b2oKeGIlb2v+VxKftn+bCpi4qaMtOlpqaKB7Dk Kfz2k/iBmcMZiERPd2uH4KhPMrNNx+Sb86KGGu2E6Vb3cVbc X-Google-Smtp-Source: ANB0VdbG8nKXMiKKHBF/1qKdOt+J/J532YwWy/PYZlGU2EsUfMZXAdDR2gy6E2Zd1z/6cs7VyWzIxn/G0wBp17c5QXTQjEIm5NN1 MIME-Version: 1.0 X-Received: by 2002:a24:f902:: with SMTP id l2-v6mr14959021ith.4.1537282563098; Tue, 18 Sep 2018 07:56:03 -0700 (PDT) Date: Tue, 18 Sep 2018 07:56:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000017d92b0576267d0f@google.com> Subject: kernel BUG at include/linux/page-flags.h:LINE! From: syzbot To: ak@linux.intel.com, akpm@linux-foundation.org, dhowells@redhat.com, jack@suse.cz, jrdr.linux@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mawilcox@microsoft.com, mgorman@techsingularity.net, syzkaller-bugs@googlegroups.com 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: c0747ad363ff Merge tag 'linux-kselftest-4.19-rc5' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1483a8c9400000 kernel config: https://syzkaller.appspot.com/x/.config?x=5fa12be50bca08d8 dashboard link: https://syzkaller.appspot.com/bug?extid=5373a556df9f9fec7e90 compiler: gcc (GCC) 8.0.1 20180413 (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+5373a556df9f9fec7e90@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at include/linux/page-flags.h:273! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9734 Comm: kworker/u4:1 Not tainted 4.19.0-rc4+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-7:4) RIP: 0010:PageWaiters include/linux/page-flags.h:273 [inline] RIP: 0010:wake_up_page mm/filemap.c:1069 [inline] RIP: 0010:end_page_writeback+0x769/0x950 mm/filemap.c:1233 Code: ff e8 6b 25 e2 ff 48 8b 85 30 fe ff ff 4c 8d 70 ff e9 d9 fa ff ff e8 56 25 e2 ff 48 c7 c6 e0 24 12 88 48 89 df e8 a7 cc 13 00 <0f> 0b e8 40 25 e2 ff 48 c7 c6 60 25 12 88 48 89 df e8 91 cc 13 00 RSP: 0018:ffff8801b91e5288 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffea00064dabc0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81b08db9 RDI: ffffed003723ca42 RBP: ffff8801b91e5460 R08: ffff880157a40400 R09: ffffed003b5e4fe8 kobject: 'loop0' (00000000d6ad330d): kobject_uevent_env R10: ffffed003b5e4fe8 R11: ffff8801daf27f47 R12: 0000000000000001 R13: 1ffff1003723ca53 R14: 1ffff1003723ca7f R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6134b6cc90 CR3: 00000001cc363000 CR4: 00000000001406e0 kobject: 'loop0' (00000000d6ad330d): fill_kobj_path: path = '/devices/virtual/block/loop0' DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_endio+0x67c/0xb60 mm/filemap.c:1260 mpage_end_io+0x144/0x1e0 fs/mpage.c:54 bio_endio+0x5d2/0xb80 block/bio.c:1774 generic_make_request_checks+0x5f6/0x26c0 block/blk-core.c:2347 generic_make_request+0x2bd/0x15a0 block/blk-core.c:2401 submit_bio+0xba/0x460 block/blk-core.c:2566 mpage_bio_submit fs/mpage.c:66 [inline] __mpage_writepage+0x1515/0x1d30 fs/mpage.c:627 write_cache_pages+0xd8e/0x1e50 mm/page-writeback.c:2239 mpage_writepages+0x14c/0x320 fs/mpage.c:730 fat_writepages+0x24/0x30 fs/fat/inode.c:198 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2340 __writeback_single_inode+0x20a/0x1620 fs/fs-writeback.c:1323 writeback_sb_inodes+0x71f/0x11d0 fs/fs-writeback.c:1587 __writeback_inodes_wb+0x1b9/0x340 fs/fs-writeback.c:1656 wb_writeback+0xa73/0xfc0 fs/fs-writeback.c:1765 wb_check_start_all fs/fs-writeback.c:1889 [inline] wb_do_writeback fs/fs-writeback.c:1915 [inline] wb_workfn+0xee9/0x1790 fs/fs-writeback.c:1949 process_one_work+0xc90/0x1b90 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Modules linked in: kobject: 'loop5' (0000000003a73ee3): kobject_uevent_env kobject: 'loop5' (0000000003a73ee3): fill_kobj_path: path = '/devices/virtual/block/loop5' ---[ end trace b1bf6d33e16c103c ]--- RIP: 0010:PageWaiters include/linux/page-flags.h:273 [inline] RIP: 0010:wake_up_page mm/filemap.c:1069 [inline] RIP: 0010:end_page_writeback+0x769/0x950 mm/filemap.c:1233 Code: ff e8 6b 25 e2 ff 48 8b 85 30 fe ff ff 4c 8d 70 ff e9 d9 fa ff ff e8 56 25 e2 ff 48 c7 c6 e0 24 12 88 48 89 df e8 a7 cc 13 00 <0f> 0b e8 40 25 e2 ff 48 c7 c6 60 25 12 88 48 89 df e8 91 cc 13 00 RSP: 0018:ffff8801b91e5288 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffea00064dabc0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81b08db9 RDI: ffffed003723ca42 kobject: 'loop2' (0000000001c28b7c): kobject_uevent_env RBP: ffff8801b91e5460 R08: ffff880157a40400 R09: ffffed003b5e4fe8 kobject: 'loop2' (0000000001c28b7c): fill_kobj_path: path = '/devices/virtual/block/loop2' R10: ffffed003b5e4fe8 R11: ffff8801daf27f47 R12: 0000000000000001 R13: 1ffff1003723ca53 R14: 1ffff1003723ca7f R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'loop3' (0000000091672ed1): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop3' (0000000091672ed1): fill_kobj_path: path = '/devices/virtual/block/loop3' CR2: 0000001b3202d000 CR3: 00000001cad9f000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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