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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89FA6C433FE for ; Sat, 22 Oct 2022 10:07:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229849AbiJVKH4 (ORCPT ); Sat, 22 Oct 2022 06:07:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230173AbiJVKHa (ORCPT ); Sat, 22 Oct 2022 06:07:30 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E23EC2D12AD for ; Sat, 22 Oct 2022 02:23:49 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id l9-20020a5d8f89000000b006bd33712128so2538054iol.17 for ; Sat, 22 Oct 2022 02:23:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Jc5HfOTP+BX5owFig8c1StXOJ0JOWyCuNVssfFEijNo=; b=XT3cyVuNyDX5naImufvtNA+sQJV+6t0zdrUh2pYPJRm43OTnRTei4FuIe7wqhCsclX C1g5/S9rkxxoYb5E/vFpinMTh5ZQ5xCx/7Le46tn9IwKeKpXc8WJf0lrtMEMovt5t8HC 9IT64E7DQHq6wuRNOwu/TAhGrdHEp3Vtd8O/v2nruEFFX/Xv1I/r/inujJ0QVr17mXYX 9pmMy3r1kbjbW1MGFYwUir+jjTTRr8XIc5m8CGgcZr/5gCSDGm9xv3LqAq8nXn4bwRmL jo6qFGPVxbxy1Y7hhDojRB049ofdDg/Tyrnz146MAzrjH3g7EHNWP4TMgt+sT+EDy6kE pBgw== X-Gm-Message-State: ACrzQf1TcBguH5qRnXY76W1cOwSw7nYn2kubvuJ1J8ycsmP5L2S5FMJm wabjBG+40pXQoFvTFeeBB9UUXh/1Qbfd1fwXPHG1hW7wfKHQ X-Google-Smtp-Source: AMsMyM4b6EOrB2vHrDffY2c19lq6BydTTO7C6I0GHL9Y51ztBtq/oVw7VvklINRFPO24B9faFMxO2O8D+v1KBXX751Ohj7R8oOAP MIME-Version: 1.0 X-Received: by 2002:a05:6638:1305:b0:363:ecbc:25d4 with SMTP id r5-20020a056638130500b00363ecbc25d4mr17772709jad.59.1666429960734; Sat, 22 Oct 2022 02:12:40 -0700 (PDT) Date: Sat, 22 Oct 2022 02:12:40 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000da4f6b05eb9bf593@google.com> Subject: [syzbot] general protection fault in nilfs_clear_dirty_page From: syzbot To: konishi.ryusuke@gmail.com, linux-kernel@vger.kernel.org, linux-nilfs@vger.kernel.org, syzkaller-bugs@googlegroups.com 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: 6d36c728bc2e Merge tag 'net-6.1-rc2' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1526d2e2880000 kernel config: https://syzkaller.appspot.com/x/.config?x=afc317c0f52ce670 dashboard link: https://syzkaller.appspot.com/bug?extid=53369d11851d8f26735c compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a2030ff47985/disk-6d36c728.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/82a6ec6fd4db/vmlinux-6d36c728.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+53369d11851d8f26735c@syzkaller.appspotmail.com NILFS (loop4): discard dirty block: blocknr=0, size=1024 NILFS (loop4): discard dirty block: blocknr=0, size=1024 NILFS (loop4): discard dirty block: blocknr=0, size=1024 NILFS (loop4): discard dirty block: blocknr=0, size=1024 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 5633 Comm: kworker/u4:11 Not tainted 6.1.0-rc1-syzkaller-00093-g6d36c728bc2e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: writeback wb_workfn (flush-7:4) RIP: 0010:nilfs_clear_dirty_page+0x9a/0x1080 fs/nilfs2/page.c:387 Code: 31 e8 9a b3 3c fe 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 e0 9c 90 fe 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 c7 9c 90 fe 4c 8b 2b 49 8d 5d 28 RSP: 0018:ffffc900053e7020 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026a08000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00020d3440 RBP: ffffc900053e70f0 R08: ffffffff834ae92a R09: fffff9400041a689 R10: fffff9400041a689 R11: 1ffffd400041a688 R12: 000000000000000e R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea00020d3440 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f592433f000 CR3: 0000000033285000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nilfs_clear_dirty_pages+0x1d9/0x380 fs/nilfs2/page.c:372 nilfs_writepages+0x117/0x150 fs/nilfs2/inode.c:165 do_writepages+0x3c3/0x680 mm/page-writeback.c:2469 __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587 writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870 __writeback_inodes_wb+0x125/0x420 fs/fs-writeback.c:1941 wb_writeback+0x440/0x7b0 fs/fs-writeback.c:2046 wb_check_start_all fs/fs-writeback.c:2168 [inline] wb_do_writeback fs/fs-writeback.c:2194 [inline] wb_workfn+0x827/0xef0 fs/fs-writeback.c:2227 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:nilfs_clear_dirty_page+0x9a/0x1080 fs/nilfs2/page.c:387 Code: 31 e8 9a b3 3c fe 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 e0 9c 90 fe 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 c7 9c 90 fe 4c 8b 2b 49 8d 5d 28 RSP: 0018:ffffc900053e7020 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888026a08000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00020d3440 RBP: ffffc900053e70f0 R08: ffffffff834ae92a R09: fffff9400041a689 R10: fffff9400041a689 R11: 1ffffd400041a688 R12: 000000000000000e R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea00020d3440 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c000074368 CR3: 000000007ef36000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 9a b3 3c fe callq 0xfe3cb39f 5: 49 8d 5f 18 lea 0x18(%r15),%rbx 9: 48 89 d8 mov %rbx,%rax c: 48 c1 e8 03 shr $0x3,%rax 10: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) 15: 74 08 je 0x1f 17: 48 89 df mov %rbx,%rdi 1a: e8 e0 9c 90 fe callq 0xfe909cff 1f: 48 8b 1b mov (%rbx),%rbx 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 c7 9c 90 fe callq 0xfe909cff 38: 4c 8b 2b mov (%rbx),%r13 3b: 49 8d 5d 28 lea 0x28(%r13),%rbx --- 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.