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Message #135217
[Bug 1496438] Missing required logs.
This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:
apport-collect 1496438
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1496438
Title:
4.2.0.7 BUG: unable to handle kernel NULL pointer dereference at
0000000000000334
Status in linux package in Ubuntu:
Incomplete
Bug description:
I don't know how to reproduce this, as it worked for 2 weeks before
happening, but was consistent then.
I used btrfs on top of bcache on top of lvm. While trying to sbuild a
package I got strange errors, got this messge in dmesg.
Kernel 4.2.0-7-lowlatency release: wily:
lsblk:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 465,8G 0 disk
├─hdd-Work 252:4 0 232,9G 0 lvm
│ └─bcache0 251:0 0 232,9G 0 disk /home
└─hdd-Home 252:5 0 232,9G 0 lvm
└─bcache1 251:1 0 232,9G 0 disk /media/Work
sdb 8:16 0 238,5G 0 disk
├─sdb1 8:17 0 512M 0 part /boot/efi
├─sdb2 8:18 0 244M 0 part /boot
└─sdb3 8:19 0 237,8G 0 part
├─ssd-root 252:0 0 64G 0 lvm /
├─ssd-bcache 252:1 0 64G 0 lvm
│ ├─bcache0 251:0 0 232,9G 0 disk /home
│ └─bcache1 251:1 0 232,9G 0 disk /media/Work
├─ssd-swap 252:2 0 8G 0 lvm
│ └─cryptswap1 252:6 0 8G 0 crypt [SWAP]
└─ssd-Free 252:3 0 101,8G 0 lvm /media/Free
loop0 7:0 0 800M 0 loop
└─secrets 252:7 0 798M 0 crypt /home/kick/Secrets
Kernel traces:
[ 224.670454] BUG: unable to handle kernel NULL pointer dereference at 0000000000000334
[ 224.672387] IP: [<ffffffffc0305601>] btrfs_sync_file+0xc1/0x360 [btrfs]
[ 224.674261] PGD 8451a067 PUD 84527067 PMD 0
[ 224.676056] Oops: 0002 [#1] PREEMPT SMP
[ 224.677810] Modules linked in: algif_skcipher af_alg ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6_tables overlay xt_addrtype xt_conntrack xt_CHECKSUM ax88179_178a iptable_mangle usbnet ipt_MASQUERADE rtsx_usb_ms nf_nat_masquerade_ipv4 aufs iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 mii memstick nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc binfmt_misc iptable_filter ip_tables x_tables bnep drbg ansi_cprng dm_crypt nls_iso8859_1 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul snd_soc_rt5640 glue_helper ablk_helper snd_soc_rl6231 cryptd snd_soc_core input_leds serio_raw hid_sensor_rotation snd_compress ac97_bus snd_pcm_dmaengine snd_seq_midi snd_seq_midi_event snd_hda_codec_realtek
[ 224.683606] hid_sensor_incl_3d uvcvideo videobuf2_vmalloc snd_hda_codec_generic hid_sensor_als videobuf2_memops hid_sensor_magn_3d snd_hda_codec_hdmi hid_sensor_accel_3d hid_sensor_gyro_3d btusb hid_sensor_trigger btrtl industrialio_triggered_buffer btbcm snd_rawmidi joydev btintel videobuf2_core kfifo_buf snd_hda_intel industrialio snd_hda_codec hid_sensor_iio_common v4l2_common videodev snd_hda_core hid_multitouch snd_hwdep media bluetooth mei_me snd_seq lpc_ich mei snd_pcm snd_seq_device dw_dmac dw_dmac_core snd_timer snd soundcore ideapad_laptop sparse_keymap 8250_dw i2c_designware_platform mac_hid spi_pxa2xx_platform soc_button_array i2c_designware_core snd_soc_sst_acpi kvm_intel kvm parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq hid_sensor_custom hid_sensor_hub uas usb_storage bcache
[ 224.689905] hid_generic usbhid rtsx_usb_sdmmc rtsx_usb i915 i2c_algo_bit drm_kms_helper drm psmouse ahci libahci sdhci_acpi sdhci video i2c_hid hid
[ 224.694241] CPU: 1 PID: 2915 Comm: debconf-set-sel Tainted: G W 4.2.0-7-lowlatency #7-Ubuntu
[ 224.696433] Hardware name: LENOVO 20344/INVALID, BIOS 96CN25WW(V1.11) 07/09/2014
[ 224.698641] task: ffff880099723800 ti: ffff880084510000 task.ti: ffff880084510000
[ 224.700843] RIP: 0010:[<ffffffffc0305601>] [<ffffffffc0305601>] btrfs_sync_file+0xc1/0x360 [btrfs]
[ 224.703068] RSP: 0018:ffff880084513e38 EFLAGS: 00010292
[ 224.705272] RAX: ffff880099723800 RBX: ffff880159625400 RCX: 0000000000000000
[ 224.707505] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880098237a58
[ 224.709733] RBP: ffff880084513eb8 R08: 0000000000000001 R09: 0000000001f94ff0
[ 224.711962] R10: 000000000000009c R11: 0000000000000246 R12: ffff880098237a58
[ 224.714191] R13: ffff8800982379b0 R14: 0000000000000000 R15: 0000000000000000
[ 224.716431] FS: 00007fdffa459700(0000) GS:ffff88015f240000(0000) knlGS:0000000000000000
[ 224.718656] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 224.720882] CR2: 0000000000000334 CR3: 000000008456a000 CR4: 00000000001406e0
[ 224.723098] Stack:
[ 224.725289] ffff880159625410 0000000200000001 8000000000000000 ffff8800981d7d80
[ 224.727494] 7fffffffffffffff 0000000000000000 0000000000000000 ffff88009a803000
[ 224.729686] 0000000000001144 0000000000000002 ffff880084513ea8 ffff880159625400
[ 224.731860] Call Trace:
[ 224.733994] [<ffffffff8122468b>] vfs_fsync_range+0x4b/0xb0
[ 224.736142] [<ffffffff8122474d>] do_fsync+0x3d/0x70
[ 224.738275] [<ffffffff812249d0>] SyS_fsync+0x10/0x20
[ 224.740379] [<ffffffff817c4bf2>] entry_SYSCALL_64_fastpath+0x16/0x75
[ 224.742476] Code: eb a1 e8 37 da cf c0 eb 9a 48 8b 45 a0 4c 8b 75 a8 4d 8d a5 a8 00 00 00 4c 89 e7 4c 29 f0 48 83 c0 01 48 89 45 90 e8 0f d4 4b c1 <f0> 41 ff 87 34 03 00 00 49 8b 85 70 ff ff ff 48 c1 e8 07 83 e0
[ 224.744787] RIP [<ffffffffc0305601>] btrfs_sync_file+0xc1/0x360 [btrfs]
[ 224.746956] RSP <ffff880084513e38>
[ 224.749088] CR2: 0000000000000334
[ 224.751273] ---[ end trace 7e8588f0d9eb10fa ]---
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