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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 ADC9EC47082 for ; Mon, 31 May 2021 07:15:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8700861186 for ; Mon, 31 May 2021 07:15:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230165AbhEaHRX (ORCPT ); Mon, 31 May 2021 03:17:23 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:57332 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230135AbhEaHRD (ORCPT ); Mon, 31 May 2021 03:17:03 -0400 Received: by mail-io1-f69.google.com with SMTP id s15-20020a6b2c0f0000b02904994a0a3b70so309447ios.23 for ; Mon, 31 May 2021 00:15:24 -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=e3Sg/yJ7v/ElwEk3fKaKRKfCBKmAt77OVg5N6lZHBCk=; b=ECcYfFOlHC/SVtKWoqFsR4MkS6joHtnixvaqE38uGKVjGYjyejXc7muRUQYFOxiQGK amlaNir81z07EGMKvdmToOkaz3n0k7FMMoAZZrCkuTV4xK7n6oewye8MTzlt5RYJKNtC UMQeVT6HRnm9STj0KbOzj57GmBq3vEaGETpotCHxEaVcrYnh5Dst909oDUfa9prnV66e 3fa3YduMtnLzFKIAHTlHQaFJo+0oAb/CTd44NgJ5VCuKxWc/GBjHvaiTU7HinWzcX+5h lJB1CVyduDLlnO/G8kBiXQ/9jrp71ccREJ6vp3nngwQLQqutrJ+rt4kM3mAOSQ8NORYN wwSA== X-Gm-Message-State: AOAM533lr5Ts+B9kbEPGAbubBgn+2SrfUBbdjAo0YPipZ/eFOgIe6PVt pjo9oI2ayg7hrmeQqs6PxXou5QMQ61hDdoC/Io1ibwnpB72H X-Google-Smtp-Source: ABdhPJxxZhkxNLcjNI8DC0mUwoGbXnvplZ8lbg0+HFDnFJuWBjEYQMemL0uNKiOkQkszbCNWy0WKeHY0xVkFDkFjZYhyMQ9IqkNm MIME-Version: 1.0 X-Received: by 2002:a92:dd89:: with SMTP id g9mr16787097iln.209.1622445324258; Mon, 31 May 2021 00:15:24 -0700 (PDT) Date: Mon, 31 May 2021 00:15:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003853da05c39afd00@google.com> Subject: [syzbot] kernel BUG in mpage_prepare_extent_to_map From: syzbot To: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 7ac3a1c1 Merge tag 'mtd/fixes-for-5.13-rc4' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d276efd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9f3da44a01882e99 dashboard link: https://syzkaller.appspot.com/bug?extid=99043e2052d9c50c81fc Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+99043e2052d9c50c81fc@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2625! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 1259 Comm: kworker/u17:7 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:mpage_prepare_extent_to_map+0xb69/0xe20 fs/ext4/inode.c:2625 Code: 8d 5d ff e9 46 fc ff ff e8 d4 02 69 ff 0f 0b e8 cd 02 69 ff 48 c7 c6 80 75 7f 89 4c 89 ef e8 ae 23 9b ff 0f 0b e8 b7 02 69 ff <0f> 0b 45 31 ff e8 ad 02 69 ff 0f b6 9c 24 b8 00 00 00 31 ff 89 de RSP: 0000:ffffc90004467238 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000040 RCX: 0000000000000000 RDX: ffff888016d3c240 RSI: ffffffff820b0ae9 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff820b0874 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffea00015cf440 R14: ffffc900044675c8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd171e3e73f CR3: 0000000045f64000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_writepages+0x941/0x3b70 fs/ext4/inode.c:2754 do_writepages+0xec/0x290 mm/page-writeback.c:2352 __writeback_single_inode+0x126/0xfd0 fs/fs-writeback.c:1467 writeback_sb_inodes+0x53d/0xef0 fs/fs-writeback.c:1732 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1801 wb_writeback+0x814/0xc40 fs/fs-writeback.c:1907 wb_check_start_all fs/fs-writeback.c:2031 [inline] wb_do_writeback fs/fs-writeback.c:2057 [inline] wb_workfn+0xb98/0x12d0 fs/fs-writeback.c:2091 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.