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Date: Mon, 12 Dec 2016 10:00:45 +0100
From: Olaf Hering <olaf@...fle.de>
To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: 4.8.12, crash in ext4, __d_lookup_rcu
On Mon, Dec 12, Olaf Hering wrote:
> [197064.401309] RIP: 0010:[<ffffffffbe242ae7>] [<ffffffffbe242ae7>] __d_lookup_rcu+0x67/0x180
... and umount is not happy after that, which I think is expected:
root@...book:~ # umount -v /BACKUP_OLH_1T ; dmsetup remove luks-feaf408d-3257-4850-b597-bbca1dc651df ; sync ; blockdev --rereadpt /dev/disk/by-id/ata-WDC_WD10EZRX-00D8PB0_WD-WCC4M1CCD07U
Dec 12 09:58:30 probook udisksd[2141]: Cleaning up mount point /BACKUP_OLH_1T (device 254:6 is not mounted)
Dec 12 09:58:33 probook kernel: BUG: Dentry ffffa2c50b703f00{i=295818f,n=cur} still in use (15) [unmount of ext4 dm-6]
Dec 12 09:58:33 probook kernel: ------------[ cut here ]------------
Dec 12 09:58:33 probook kernel: WARNING: CPU: 2 PID: 24205 at /work/github/olafhering/linux/fs/dcache.c:1436 umount_check+0x72/0x80
Dec 12 09:58:33 probook kernel: Modules linked in: cdc_acm tun fuse ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables af_packet bridge stp llc msr nls_utf8 isofs loop dm_crypt algif_skcipher af_alg btrfs zlib_deflate xor raid6_pq uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_codec amdkfd amd_iommu_v2 snd_hda_core radeon ttm drm_kms_helper drm snd_hwdep fb_sys_fops sky2 snd_pcm syscopyarea tpm_infineon snd_timer sysfillrect sysimgblt i2c_algo_bit snd sp5100_tco i2c_piix4 acpi_cpufreq kvm_amd tpm_tis tpm_tis_core k10temp shpchp soundcore kvm hp_accel lis3lv02d sparse_keymap rfkill fjes tpm video joydev input_polldev irqbypass pcspkr thermal ac battery button wmi fan hid_generic
Dec 12 09:58:33 probook kernel: usbhid ohci_pci serio_raw ehci_pci ohci_hcd ehci_hcd usbcore usb_common sdhci_pci sdhci mmc_core sg dm_multipath dm_mod scsi_dh_alua
Dec 12 09:58:33 probook kernel: CPU: 2 PID: 24205 Comm: umount Tainted: G D 4.8.12-probook #15
Dec 12 09:58:33 probook kernel: Hardware name: Hewlett-Packard HP ProBook 6555b/1455, BIOS 68DTM Ver. F.21 06/14/2012
Dec 12 09:58:33 probook kernel: 0000000000000000 ffffa2c6f8663cf8 ffffffffbe3c0530 0000000000000000
Dec 12 09:58:33 probook kernel: 0000000000000000 ffffa2c6f8663d38 ffffffffbe08326b 0000059cf8663d10
Dec 12 09:58:33 probook kernel: ffffa2c50b6eb8e0 ffffa2c50b703f00 ffffa2c50b703f58 ffffa2c50b6eb8e0
Dec 12 09:58:33 probook kernel: Call Trace:
Dec 12 09:58:33 probook kernel: [<ffffffffbe3c0530>] dump_stack+0x63/0x83
Dec 12 09:58:33 probook kernel: [<ffffffffbe08326b>] __warn+0xcb/0xf0
Dec 12 09:58:33 probook kernel: [<ffffffffbe08335d>] warn_slowpath_null+0x1d/0x20
Dec 12 09:58:33 probook kernel: [<ffffffffbe23fe72>] umount_check+0x72/0x80
Dec 12 09:58:33 probook kernel: [<ffffffffbe23f990>] d_walk+0xd0/0x300
Dec 12 09:58:33 probook kernel: [<ffffffffbe23fe00>] ? dentry_free+0x80/0x80
Dec 12 09:58:33 probook kernel: [<ffffffffbe241636>] do_one_tree+0x26/0x40
Dec 12 09:58:33 probook kernel: [<ffffffffbe24249d>] shrink_dcache_for_umount+0x2d/0x90
Dec 12 09:58:33 probook kernel: [<ffffffffbe22ad4f>] generic_shutdown_super+0x1f/0x100
Dec 12 09:58:33 probook kernel: [<ffffffffbe22b127>] kill_block_super+0x27/0x70
Dec 12 09:58:33 probook kernel: [<ffffffffbe22b253>] deactivate_locked_super+0x43/0x70
Dec 12 09:58:33 probook kernel: [<ffffffffbe22b72a>] deactivate_super+0x5a/0x60
Dec 12 09:58:33 probook kernel: [<ffffffffbe249cef>] cleanup_mnt+0x3f/0x90
Dec 12 09:58:33 probook kernel: [<ffffffffbe249d82>] __cleanup_mnt+0x12/0x20
Dec 12 09:58:33 probook kernel: [<ffffffffbe0a0fe0>] task_work_run+0x80/0xa0
Dec 12 09:58:33 probook kernel: [<ffffffffbe0032e2>] exit_to_usermode_loop+0xc2/0xd0
Dec 12 09:58:33 probook kernel: [<ffffffffbe003abe>] syscall_return_slowpath+0x4e/0x60
Dec 12 09:58:33 probook kernel: [<ffffffffbe70b9fe>] entry_SYSCALL_64_fastpath+0xa6/0xa8
Dec 12 09:58:33 probook kernel: ---[ end trace c55214155fae1a63 ]---
Segmentation fault
Dec 12 09:58:35 probook kernel: EXT4-fs (dm-6): sb orphan head is 25657346
Dec 12 09:58:35 probook kernel: sb_info orphan list:
Dec 12 09:58:35 probook kernel: inode dm-6:25657346 at ffffa2c64f4b0a48: mode 40755, nlink 0, next 25657347
Dec 12 09:58:35 probook kernel: inode dm-6:25657347 at ffffa2c655bac2a8: mode 40755, nlink 0, next 25657348
Dec 12 09:58:35 probook kernel: inode dm-6:25657348 at ffffa2c63f5d7598: mode 40755, nlink 0, next 25658000
Dec 12 09:58:35 probook kernel: inode dm-6:25658000 at ffffa2c6d1341368: mode 40755, nlink 0, next 25658006
Command failed
Dec 12 09:58:35 probook kernel: inode dm-6:25658006 at ffffa2c6d13630e8: mode 40755, nlink 0, next 25658115
Dec 12 09:58:35 probook kernel: inode dm-6:25658115 at ffffa2c552321718: mode 40755, nlink 0, next 43286668
Dec 12 09:58:35 probook kernel: inode dm-6:43286668 at ffffa2c6d13d19c8: mode 40755, nlink 0, next 43319488
Dec 12 09:58:35 probook kernel: inode dm-6:43319488 at ffffa2c60dd506d8: mode 40700, nlink 0, next 43352067
Dec 12 09:58:35 probook kernel: inode dm-6:43352067 at ffffa2c608808a48: mode 40700, nlink 0, next 43352114
Dec 12 09:58:35 probook kernel: inode dm-6:43352114 at ffffa2c608def6d8: mode 40755, nlink 0, next 43352455
Dec 12 09:58:35 probook kernel: inode dm-6:43352455 at ffffa2c50b6ea5d8: mode 40755, nlink 0, next 43352463
Dec 12 09:58:35 probook kernel: inode dm-6:43352463 at ffffa2c50b6c0698: mode 40755, nlink 0, next 0
Dec 12 09:58:35 probook kernel: ------------[ cut here ]------------
Dec 12 09:58:35 probook kernel: kernel BUG at /work/github/olafhering/linux/fs/ext4/super.c:875!
Dec 12 09:58:39 probook kernel: invalid opcode: 0000 [#2] PREEMPT SMP
Dec 12 09:58:39 probook kernel: Modules linked in: cdc_acm tun fuse ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables af_packet bridge stp llc msr nls_utf8 isofs loop dm_crypt algif_skcipher af_alg btrfs zlib_deflate xor raid6_pq uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_codec amdkfd amd_iommu_v2 snd_hda_core radeon ttm drm_kms_helper drm snd_hwdep fb_sys_fops sky2 snd_pcm syscopyarea tpm_infineon snd_timer sysfillrect sysimgblt i2c_algo_bit snd sp5100_tco i2c_piix4 acpi_cpufreq kvm_amd tpm_tis tpm_tis_core k10temp shpchp soundcore kvm hp_accel lis3lv02d sparse_keymap rfkill fjes tpm video joydev input_polldev irqbypass pcspkr thermal ac battery button wmi fan hid_generic
Dec 12 09:58:39 probook kernel: usbhid ohci_pci serio_raw ehci_pci ohci_hcd ehci_hcd usbcore usb_common sdhci_pci sdhci mmc_core sg dm_multipath dm_mod scsi_dh_alua
Dec 12 09:58:39 probook kernel: CPU: 2 PID: 24205 Comm: umount Tainted: G D W 4.8.12-probook #15
Dec 12 09:58:39 probook kernel: Hardware name: Hewlett-Packard HP ProBook 6555b/1455, BIOS 68DTM Ver. F.21 06/14/2012
Dec 12 09:58:39 probook kernel: task: ffffa2c70dac6300 task.stack: ffffa2c6f8660000
Dec 12 09:58:39 probook kernel: RIP: 0010:[<ffffffffbe2d8409>] [<ffffffffbe2d8409>] ext4_put_super+0x2d9/0x350
Dec 12 09:58:40 probook kernel: RSP: 0018:ffffa2c6f8663de0 EFLAGS: 00010202
Dec 12 09:58:40 probook kernel: RAX: ffffa2c64f4b09e0 RBX: ffffa2c69db6c000 RCX: 0000000000000006
Dec 12 09:58:40 probook kernel: RDX: 0000000000000007 RSI: 0000000000000246 RDI: ffffa2c73fd0e180
Dec 12 09:58:40 probook kernel: RBP: ffffa2c6f8663e10 R08: 000000000000e82f R09: 0000000000000004
Dec 12 09:58:40 probook kernel: R10: 000800010001cf00 R11: 00000000000006f6 R12: ffffa2c69db6c200
Dec 12 09:58:40 probook kernel: R13: ffffa2c720e3a000 R14: ffffa2c69db6c200 R15: ffffffffbea492e0
Dec 12 09:58:40 probook kernel: FS: 00007f90a804c2c0(0000) GS:ffffa2c73fd00000(0000) knlGS:0000000000000000
Dec 12 09:58:40 probook kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Dec 12 09:58:40 probook kernel: CR2: 00007fa9884cc008 CR3: 0000000161f39000 CR4: 00000000000006e0
Dec 12 09:58:40 probook kernel: Stack:
Dec 12 09:58:40 probook kernel: ffffa2c600000000 ffffa2c720e3a000 ffffffffbe840c40 ffffa2c70fadf038
Dec 12 09:58:40 probook kernel: 0000000000000000 ffffa2c70dac6a40 ffffa2c6f8663e30 ffffffffbe22ad9f
Dec 12 09:58:40 probook kernel: 0000000000000083 ffffa2c7242e20c0 ffffa2c6f8663e50 ffffffffbe22b127
Dec 12 09:58:40 probook kernel: Call Trace:
Dec 12 09:58:40 probook kernel: [<ffffffffbe22ad9f>] generic_shutdown_super+0x6f/0x100
Dec 12 09:58:40 probook kernel: [<ffffffffbe22b127>] kill_block_super+0x27/0x70
Dec 12 09:58:40 probook kernel: [<ffffffffbe22b253>] deactivate_locked_super+0x43/0x70
Dec 12 09:58:40 probook kernel: [<ffffffffbe22b72a>] deactivate_super+0x5a/0x60
Dec 12 09:58:40 probook kernel: [<ffffffffbe249cef>] cleanup_mnt+0x3f/0x90
Dec 12 09:58:40 probook kernel: [<ffffffffbe249d82>] __cleanup_mnt+0x12/0x20
Dec 12 09:58:40 probook kernel: [<ffffffffbe0a0fe0>] task_work_run+0x80/0xa0
Dec 12 09:58:40 probook kernel: [<ffffffffbe0032e2>] exit_to_usermode_loop+0xc2/0xd0
Dec 12 09:58:40 probook kernel: [<ffffffffbe003abe>] syscall_return_slowpath+0x4e/0x60
Dec 12 09:58:40 probook kernel: [<ffffffffbe70b9fe>] entry_SYSCALL_64_fastpath+0xa6/0xa8
Dec 12 09:58:40 probook kernel: Code: 8d 77 08 e8 fa 7b 09 00 48 8b bb 80 01 00 00 e8 fe c4 f2 ff 48 89 df e8 f6 c4 f2 ff 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b 48 c7 c1 a7 28 a5 be ba 45 03 00 00 48 c7 c6 78 fa 83 be
Dec 12 09:58:40 probook kernel: RIP [<ffffffffbe2d8409>] ext4_put_super+0x2d9/0x350
Dec 12 09:58:40 probook kernel: RSP <ffffa2c6f8663de0>
Dec 12 09:58:40 probook kernel: ---[ end trace c55214155fae1a64 ]---
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