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 CE05EC433FE for ; Mon, 17 Oct 2022 07:54:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230012AbiJQHyh (ORCPT ); Mon, 17 Oct 2022 03:54:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229660AbiJQHye (ORCPT ); Mon, 17 Oct 2022 03:54:34 -0400 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81948A1AE for ; Mon, 17 Oct 2022 00:54:33 -0700 (PDT) Received: by mail-il1-f200.google.com with SMTP id y13-20020a056e021bed00b002faba3c4afbso8498800ilv.13 for ; Mon, 17 Oct 2022 00:54:33 -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=gV599A531jAViTaqPMnOQtBFnJJSS2cukLSLIg7dHW4=; b=OIfr+nEVQyNWLxWD4oRoTrKspcHaXVMtd4et1wkE7SO/OpUhNNv6bshDnTdMWl0JTa DdZqS/QyxWEQSoqHObfUZnpRVpYJoD+sc34V+ZmPwz+4EMn5jAHH2TM8lopCqGFpwCA/ jJAOiRtlwKdbnubNKeiS5165QmBmtGJIJMe0v+JLKYPkIEuGr2T4FC7ZLehuCguflFNy +HkoJdiprqw9zifnI/qimAN6uRW8cqJ3M92VPMPIW6iBgFaIvgAIXKb4uIA12HLroJem 62iGE5uh1PJpTUH9U42H2fOHfHkbkNVM2ho62eADfoEdvcYefS1cE1CJLMSeYVRDOt1Y fY4g== X-Gm-Message-State: ACrzQf2uIKSBuACYyiWazDG1qoiIZoJdmQXANcoQbPg+7ojl6B+eZ16d ibe7nxhFJqx38IIXsrshWXg0Nzw6sc0j5cj9MB0c2j7PR94u X-Google-Smtp-Source: AMsMyM7UWNYmxDybTwyvYjwkyIufPocYeKurnW6Scu7aO1hbSXg8265Z4V3ZdHtSNJopTry9SwVIhC2AGtFk2ObeVEZF39auElsn MIME-Version: 1.0 X-Received: by 2002:a05:6638:204b:b0:364:35b:bc2a with SMTP id t11-20020a056638204b00b00364035bbc2amr4351227jaj.44.1665993272847; Mon, 17 Oct 2022 00:54:32 -0700 (PDT) Date: Mon, 17 Oct 2022 00:54:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000039f36005eb3649ab@google.com> Subject: [syzbot] BUG: unable to handle kernel NULL pointer dereference in get_next_nat_page (2) From: syzbot To: chao@kernel.org, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@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: 493ffd6605b2 Merge tag 'ucount-rlimits-cleanups-for-v5.19'.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17cbb31a880000 kernel config: https://syzkaller.appspot.com/x/.config?x=d19f5d16783f901 dashboard link: https://syzkaller.appspot.com/bug?extid=f3829d0d4cd1c750c0c1 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/f1ff6481e26f/disk-493ffd66.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/101bd3c7ae47/vmlinux-493ffd66.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f3829d0d4cd1c750c0c1@syzkaller.appspotmail.com BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 7991b067 P4D 7991b067 PUD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3644 Comm: syz-executor.4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:ffffc900042df7e0 EFLAGS: 00010292 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888027258000 RDX: 0000000000000000 RSI: ffffea0002495640 RDI: ffff88806f559e38 RBP: ffffea0002469d00 R08: ffffffff81b5b45b R09: fffff94000492ac9 R10: fffff94000492ac9 R11: 1ffffd4000492ac8 R12: ffffea0002469d00 R13: dffffc0000000000 R14: ffffea0002495640 R15: ffffea0002469d08 FS: 0000555555873400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000035168000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: get_next_nat_page+0x3a9/0x770 fs/f2fs/node.c:154 __flush_nat_entry_set fs/f2fs/node.c:3005 [inline] f2fs_flush_nat_entries+0x9e3/0x1bf0 fs/f2fs/node.c:3109 f2fs_write_checkpoint+0x14f1/0x1d70 fs/f2fs/checkpoint.c:1667 kill_f2fs_super+0x22e/0x3c0 fs/f2fs/super.c:4538 deactivate_locked_super+0xa7/0xf0 fs/super.c:331 cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:294 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1023c8ca17 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd840e9448 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f1023c8ca17 RDX: 00007ffd840e951b RSI: 000000000000000a RDI: 00007ffd840e9510 RBP: 00007ffd840e9510 R08: 00000000ffffffff R09: 00007ffd840e92e0 R10: 00005555558748b3 R11: 0000000000000246 R12: 00007f1023ce55f6 R13: 00007ffd840ea5d0 R14: 0000555555874810 R15: 00007ffd840ea610 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:ffffc900042df7e0 EFLAGS: 00010292 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888027258000 RDX: 0000000000000000 RSI: ffffea0002495640 RDI: ffff88806f559e38 RBP: ffffea0002469d00 R08: ffffffff81b5b45b R09: fffff94000492ac9 R10: fffff94000492ac9 R11: 1ffffd4000492ac8 R12: ffffea0002469d00 R13: dffffc0000000000 R14: ffffea0002495640 R15: ffffea0002469d08 FS: 0000555555873400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 0000000035168000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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.