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 lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 84403C433F5 for ; Wed, 30 Mar 2022 17:42:38 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.94.2) (envelope-from ) id 1nZcDA-0006uU-NA; Wed, 30 Mar 2022 17:42:36 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-4.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from <3hJZEYgkbANsPVWH7IIBO7MMFA.DLLDIBRPBO9LKQBKQ.9LJ@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com>) id 1nZcD9-0006uK-8a for linux-f2fs-devel@lists.sourceforge.net; Wed, 30 Mar 2022 17:42:35 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Type:To:From:Subject:Message-ID:Date: MIME-Version:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=v89tVw8ySyr98HqbPOA8KhBHppRaKTd45nWoytVaQ0U=; b=j6cO92qdzx8/MHWWMYv0c1FfmC l3hoTuqC86zXLCgkiWgcIU2F2kpnBwKWP1F4TBz3TSWKSJ1VVLzpOTk2oOzGQhS9wiS4fYlXhJNwE UpvEkbrDDeDjSvQmuW9N6QJqR1NEP9wIQCVXMaV35u4lIE5+zwbkL+kjjGx+V078Aicg=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Type:To:From:Subject:Message-ID:Date:MIME-Version:Sender:Reply-To :Cc:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive; bh=v89tVw8ySyr98HqbPOA8KhBHppRaKTd45nWoytVaQ0U=; b=R BjOcGrc/Trm6bQAqq0v62BQABCgUlPcXMV4v0VGn6HDetDmE7BarDQrajKbcn+3wkqZ3L+pantJTJ 1TiW4+U2YmEXb3lRBF2VGzuxE8VvJ0xs22UkcsXFYmfgq+bMFbBbLaSYn1l9oYXrL74N1FrttttND miTbTyl9NPKQE3Z4=; Received: from mail-io1-f71.google.com ([209.85.166.71]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.94.2) id 1nZcL4-0007ai-5u for linux-f2fs-devel@lists.sourceforge.net; Wed, 30 Mar 2022 17:42:34 +0000 Received: by mail-io1-f71.google.com with SMTP id g11-20020a056602072b00b00645cc0735d7so14908500iox.1 for ; Wed, 30 Mar 2022 10:42:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=v89tVw8ySyr98HqbPOA8KhBHppRaKTd45nWoytVaQ0U=; b=CavWJCONNARQXZ2rwR1XPs/CzfJAaukTQQN8igorwOly8iPo0qfNo1FP104KvFu4Vw I2McfILrbw+35XvdB5C4vhIdI6Zb8hZXur+sqcA/s2RmI4d0MnNFvo2dTqyGTxIlrZZU en4DzOM1LR9IZyHvhA295/m0xgbDXAbWN+QQNRYBMy2jBUi28B3tUu7/BJcAFTXP3+WT UF87A1ECtGixaS5mS43GesyWl9IhD4MCEBRRixRZ7ohlFxWNS1xiSAyVNVqejZB9Etn7 nebuM9qfNrvDl+pfbqaY35+SJ+lQHgSnYk+LoKNouYG95Hto9t7l5iIzB+l3vPnnuuGc K59A== X-Gm-Message-State: AOAM532FKamHZetaDUbFa4E4+0sJfh7ekHflCbbQbs9WiEK2LqzJAFFs z+5HW8W66YhCT7MhaR/0OXlhEukCsrMtjsYRrvvBXaKRyAFu X-Google-Smtp-Source: ABdhPJyiz50nZ2RWpGYPBTvfpWsTpAwBWqsfVFFK+b/4bOJNNcHpmERV4SikYJ2bYt+Yp6SYDg/ejepWPdxLAKCPQ7gkC/gl80c6 MIME-Version: 1.0 X-Received: by 2002:a05:6638:1453:b0:319:c928:5ccd with SMTP id l19-20020a056638145300b00319c9285ccdmr543819jad.136.1648662148565; Wed, 30 Mar 2022 10:42:28 -0700 (PDT) Date: Wed, 30 Mar 2022 10:42:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b850b905db73117a@google.com> From: syzbot To: chao@kernel.org, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com X-Headers-End: 1nZcL4-0007ai-5u Subject: [f2fs-dev] [syzbot] BUG: unable to handle kernel NULL pointer dereference in f2fs_update_meta_page (2) X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Hello, syzbot found the following issue on: HEAD commit: ae085d7f9365 mm: kfence: fix missing objcg housekeeping fo.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12a11a77700000 kernel config: https://syzkaller.appspot.com/x/.config?x=91f0a0c422e301dd dashboard link: https://syzkaller.appspot.com/bug?extid=9e29d4a176b24eaa4fc1 compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2 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+9e29d4a176b24eaa4fc1@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 1ef8e067 P4D 1ef8e067 PUD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3615 Comm: syz-executor.0 Tainted: G W 5.17.0-syzkaller-11407-gae085d7f9365 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000400f818 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffea0000c768c0 RCX: ffff88801a581d00 RDX: 0000000000000000 RSI: ffffea0000c768c0 RDI: ffff88802c0203b8 RBP: ffffc9000400faf0 R08: ffffffff81b497cb R09: fffff9400018ed19 R10: fffff9400018ed19 R11: 0000000000000000 R12: ffff88807bb85b10 R13: 0000000000000001 R14: ffff888040fea000 R15: ffff888058d74000 FS: 000055555607f400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000479d6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: f2fs_update_meta_page+0x45/0x60 fs/f2fs/segment.c:2484 do_checkpoint fs/f2fs/checkpoint.c:1527 [inline] f2fs_write_checkpoint+0x3136/0x5b80 fs/f2fs/checkpoint.c:1689 f2fs_issue_checkpoint+0x361/0x4e0 sync_filesystem+0x1bc/0x220 fs/sync.c:66 generic_shutdown_super+0x6b/0x300 fs/super.c:445 kill_block_super+0x79/0xd0 fs/super.c:1394 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4546 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x462/0x510 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:190 [inline] exit_to_user_mode_prepare+0x1dd/0x200 kernel/entry/common.c:222 __syscall_exit_to_user_mode_work kernel/entry/common.c:304 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:315 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f48a848a4b7 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:00007ffd9c82d6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f48a848a4b7 RDX: 00007ffd9c82d7bc RSI: 000000000000000a RDI: 00007ffd9c82d7b0 RBP: 00007ffd9c82d7b0 R08: 00000000ffffffff R09: 00007ffd9c82d580 R10: 00005555560808b3 R11: 0000000000000246 R12: 00007f48a84e21ea R13: 00007ffd9c82e870 R14: 0000555556080810 R15: 00007ffd9c82e8b0 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc9000400f818 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffea0000c768c0 RCX: ffff88801a581d00 RDX: 0000000000000000 RSI: ffffea0000c768c0 RDI: ffff88802c0203b8 RBP: ffffc9000400faf0 R08: ffffffff81b497cb R09: fffff9400018ed19 R10: fffff9400018ed19 R11: 0000000000000000 R12: ffff88807bb85b10 R13: 0000000000000001 R14: ffff888040fea000 R15: ffff888058d74000 FS: 000055555607f400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000479d6000 CR4: 00000000003506f0 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. _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel