[pkg-apparmor] Bug#885775: It seems it is not related to apparmor

Sun Dec 31 06:19:06 UTC 2017

So it happened again with no apparmor loaded.Twice.

I had some packages to update, i believe it was kodi, and the system froze.
Restarted, it froze again when i ran dkg --configure -a and aptitude
upgrade again.
Every time the logs show systemd reloading before the freeze.
Difference is that now there is a kernel warning before it happens.

Additionally:
I have a libvirt virtual machine running in the background. First time it
was running the usual way. The second time (after restart) i stopped the
machine
and started another one that is not used anymore for anything. The system
froze again.
After restart i only stopped the machine, no virtual machine was running.
With the kernel 4.14 i managed to finish the update.
At this point i'm not sure this is a coincidence or not.

I assume this bug report is not Apparmor-related, i assume it should belong
to the kernel, systemd or even libvirt? If you guys look at the logs maybe
you can come with a more educated guess.

This time the logs show a kernel warning before the freeze (details below).

First freeze:

Dec 31 07:41:36 laca-desktop systemd[1]: Reloading.
Dec 31 07:41:36 laca-desktop kernel: ------------[ cut here ]------------
Dec 31 07:41:36 laca-desktop kernel: WARNING: CPU: 3 PID: 1 at
/build/linux-NHzxYj/linux-4.14.7/kernel/fork.c:419
__put_task_struct+0xf0/0x150
Dec 31 07:41:36 laca-desktop kernel: Modules linked in: ufs qnx4 hfsplus
hfs minix ntfs vfat msdos fat jfs xfs dm_mod fuse vhost_net vhost tap ebtab
Dec 31 07:41:36 laca-desktop kernel:  snd_hda_codec_hdmi sp5100_tco radeon
snd_hda_intel ttm snd_hda_codec snd_hda_core snd_hwdep drm_kms_helper snd
Dec 31 07:41:36 laca-desktop kernel: CPU: 3 PID: 1 Comm: systemd Tainted:
G           O    4.14.0-2-amd64 #1 Debian 4.14.7-1
Dec 31 07:41:36 laca-desktop kernel: Hardware name: Gigabyte Technology
Co., Ltd. To be filled by O.E.M./F2A88X-D3H, BIOS F5 05/28/2014
Dec 31 07:41:36 laca-desktop kernel: task: ffff963b2d60d040 task.stack:
ffffa872818b8000
Dec 31 07:41:36 laca-desktop kernel: RIP: 0010:__put_task_struct+0xf0/0x150
Dec 31 07:41:36 laca-desktop kernel: RSP: 0018:ffffa872818bbda0 EFLAGS:
00010246
Dec 31 07:41:36 laca-desktop kernel: RAX: 0000000000000000 RBX:
ffff963b2aae0610 RCX: 0000000000000001
Dec 31 07:41:36 laca-desktop kernel: RDX: ffffa872818bbe40 RSI:
ffff963b2aae0610 RDI: ffff963b2aae0610
Dec 31 07:41:36 laca-desktop kernel: RBP: ffffa872818bbdb0 R08:
0000000000001000 R09: 000000000000000d
Dec 31 07:41:36 laca-desktop kernel: R10: 0000000000000020 R11:
ffff96381d9a900c R12: ffffa872818bbf18
Dec 31 07:41:36 laca-desktop kernel: R13: ffff963af6cfe300 R14:
ffff963b2aae0610 R15: ffff963967be1400
Dec 31 07:41:36 laca-desktop kernel: FS:  00007f55a07a7980(0000)
GS:ffff963b3ed80000(0000) knlGS:0000000000000000
Dec 31 07:41:36 laca-desktop kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Dec 31 07:41:36 laca-desktop kernel: CR2: 000055fe8ce02068 CR3:
0000000429ab8000 CR4: 00000000000406e0
Dec 31 07:41:36 laca-desktop kernel: Call Trace:
Dec 31 07:41:36 laca-desktop kernel:  css_task_iter_next+0x74/0x80
Dec 31 07:41:36 laca-desktop kernel:  cgroup_procs_next+0x16/0x20
Dec 31 07:41:36 laca-desktop kernel:  cgroup_seqfile_next+0x1a/0x20
Dec 31 07:41:36 laca-desktop kernel:  kernfs_seq_next+0x27/0x60
Dec 31 07:41:36 laca-desktop kernel:  seq_read+0x2ce/0x3f0
Dec 31 07:41:36 laca-desktop kernel:  kernfs_fop_read+0x134/0x180
Dec 31 07:41:36 laca-desktop kernel:  ? security_file_permission+0x9b/0xc0
Dec 31 07:41:36 laca-desktop kernel:  __vfs_read+0x18/0x40
Dec 31 07:41:36 laca-desktop kernel:  vfs_read+0x8e/0x130
Dec 31 07:41:36 laca-desktop kernel:  SyS_read+0x55/0xc0
Dec 31 07:41:36 laca-desktop kernel:  system_call_fast_compare_end+0xc/0x97
Dec 31 07:41:36 laca-desktop kernel: RIP: 0033:0x7f55a00fe75d
Dec 31 07:41:36 laca-desktop kernel: RSP: 002b:00007ffc2b9ac470 EFLAGS:
00000293 ORIG_RAX: 0000000000000000
Dec 31 07:41:36 laca-desktop kernel: RAX: ffffffffffffffda RBX:
0000563a52159160 RCX: 00007f55a00fe75d
Dec 31 07:41:36 laca-desktop kernel: RDX: 0000000000001000 RSI:
0000563a521c2cd0 RDI: 000000000000001c
Dec 31 07:41:36 laca-desktop kernel: RBP: 00007f55a03ba440 R08:
00007f55a03be188 R09: 0000000000001010
Dec 31 07:41:36 laca-desktop kernel: R10: 0000000000000020 R11:
0000000000000293 R12: 0000000000000000
Dec 31 07:41:36 laca-desktop kernel: R13: 0000000000000000 R14:
000000000000001c R15: 0000563a521bd8f0
Dec 31 07:41:36 laca-desktop kernel: Code: 49 8b 94 24 d8 03 00 00 48 85 d2
74 06 f0 ff 4a 5c 74 2c 48 8b 3d 29 42 e5 00 4c 89 e6 e8 c9 a7 19 00 eb
Dec 31 07:41:36 laca-desktop kernel: ---[ end trace 0853c081f1f42500 ]---
Dec 31 07:41:36 laca-desktop kernel: BUG: unable to handle kernel NULL
pointer dereference at 00000000000000b0
Dec 31 07:41:36 laca-desktop kernel: IP: pids_free+0x15/0x40
Dec 31 07:41:36 laca-desktop kernel: PGD 0 P4D 0
Dec 31 07:41:36 laca-desktop kernel: Oops: 0000 [#1] SMP
Dec 31 07:41:36 laca-desktop kernel: Modules linked in: ufs qnx4 hfsplus
hfs minix ntfs vfat msdos fat jfs xfs dm_mod fuse vhost_net vhost tap ebtab
Dec 31 07:41:36 laca-desktop kernel:  snd_hda_codec_hdmi sp5100_tco radeon
snd_hda_intel ttm snd_hda_codec snd_hda_core snd_hwdep drm_kms_helper snd
Dec 31 07:41:36 laca-desktop kernel: CPU: 3 PID: 1 Comm: systemd Tainted:
G        W  O    4.14.0-2-amd64 #1 Debian 4.14.7-1
Dec 31 07:41:36 laca-desktop kernel: Hardware name: Gigabyte Technology
Co., Ltd. To be filled by O.E.M./F2A88X-D3H, BIOS F5 05/28/2014
Dec 31 07:41:36 laca-desktop kernel: task: ffff963b2d60d040 task.stack:
ffffa872818b8000
Dec 31 07:41:36 laca-desktop kernel: RIP: 0010:pids_free+0x15/0x40
Dec 31 07:41:36 laca-desktop kernel: RSP: 0018:ffffa872818bbd48 EFLAGS:
00010246
Dec 31 07:41:36 laca-desktop kernel: RAX: ffff963854155878 RBX:
0000000000000000 RCX: 000000000000000a
Dec 31 07:41:36 laca-desktop kernel: RDX: 000000000000000a RSI:
000000000000000b RDI: ffff963b2aae0610
Dec 31 07:41:36 laca-desktop kernel: RBP: ffffa872818bbd50 R08:
0000000000001000 R09: 000000000000000d
Dec 31 07:41:36 laca-desktop kernel: R10: 0000000000000020 R11:
ffff96381d9a900c R12: ffff963b2aae0610
Dec 31 07:41:36 laca-desktop kernel: R13: ffffffff8a85c1a0 R14:
ffff963854155878 R15: ffff963967be1400
Dec 31 07:41:36 laca-desktop kernel: FS:  00007f55a07a7980(0000)
GS:ffff963b3ed80000(0000) knlGS:0000000000000000
Dec 31 07:41:36 laca-desktop kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Dec 31 07:41:36 laca-desktop kernel: CR2: 00000000000000b0 CR3:
0000000429ab8000 CR4: 00000000000406e0
Dec 31 07:41:36 laca-desktop kernel: Call Trace:
Dec 31 07:41:36 laca-desktop kernel:  cgroup_free+0x62/0xe0
Dec 31 07:41:36 laca-desktop kernel:  __put_task_struct+0x42/0x150
Dec 31 07:41:36 laca-desktop kernel:  css_task_iter_next+0x74/0x80
Dec 31 07:41:36 laca-desktop kernel:  cgroup_procs_next+0x16/0x20
Dec 31 07:41:36 laca-desktop kernel:  cgroup_seqfile_next+0x1a/0x20
Dec 31 07:41:36 laca-desktop kernel:  kernfs_seq_next+0x27/0x60
Dec 31 07:41:36 laca-desktop kernel:  seq_read+0x2ce/0x3f0
Dec 31 07:41:36 laca-desktop kernel:  kernfs_fop_read+0x134/0x180
Dec 31 07:41:36 laca-desktop kernel:  ? security_file_permission+0x9b/0xc0
Dec 31 07:41:36 laca-desktop kernel:  __vfs_read+0x18/0x40
Dec 31 07:41:36 laca-desktop kernel:  vfs_read+0x8e/0x130
Dec 31 07:41:36 laca-desktop kernel:  SyS_read+0x55/0xc0
Dec 31 07:41:36 laca-desktop kernel:  system_call_fast_compare_end+0xc/0x97
Dec 31 07:41:36 laca-desktop kernel: RIP: 0033:0x7f55a00fe75d
Dec 31 07:41:36 laca-desktop kernel: RSP: 002b:00007ffc2b9ac470 EFLAGS:
00000293 ORIG_RAX: 0000000000000000
Dec 31 07:41:36 laca-desktop kernel: RAX: ffffffffffffffda RBX:
0000563a52159160 RCX: 00007f55a00fe75d
Dec 31 07:41:36 laca-desktop kernel: RDX: 0000000000001000 RSI:
0000563a521c2cd0 RDI: 000000000000001c
Dec 31 07:41:36 laca-desktop kernel: RBP: 00007f55a03ba440 R08:
00007f55a03be188 R09: 0000000000001010
Dec 31 07:41:36 laca-desktop kernel: R10: 0000000000000020 R11:
0000000000000293 R12: 0000000000000000
Dec 31 07:41:36 laca-desktop kernel: R13: 0000000000000000 R14:
000000000000001c R15: 0000563a521bd8f0
Dec 31 07:41:36 laca-desktop kernel: Code: b0 00 00 00 00 75 e7 5b 5d c3 66
90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 8b 87
Dec 31 07:41:36 laca-desktop kernel: RIP: pids_free+0x15/0x40 RSP:
ffffa872818bbd48

Second freeze:

Dec 31 07:47:37 laca-desktop systemd[1]: Reloading.
Dec 31 07:47:37 laca-desktop kernel: ------------[ cut here ]------------
Dec 31 07:47:37 laca-desktop kernel: WARNING: CPU: 0 PID: 1 at
/build/linux-NHzxYj/linux-4.14.7/kernel/fork.c:419
__put_task_struct+0xf0/0x150
Dec 31 07:47:37 laca-desktop kernel: Modules linked in: fuse vhost_net
vhost tap ebtable_filter ebtables devlink tun bridge stp xt_nat
xt_multiport
Dec 31 07:47:37 laca-desktop kernel:  snd_hda_core snd_hwdep drm_kms_helper
snd_pcm snd_timer drm snd sp5100_tco i2c_algo_bit soundcore sg shpchp vi
Dec 31 07:47:37 laca-desktop kernel: CPU: 0 PID: 1 Comm: systemd Tainted:
G           O    4.14.0-2-amd64 #1 Debian 4.14.7-1
Dec 31 07:47:37 laca-desktop kernel: Hardware name: Gigabyte Technology
Co., Ltd. To be filled by O.E.M./F2A88X-D3H, BIOS F5 05/28/2014
Dec 31 07:47:37 laca-desktop kernel: task: ffff99a16d60c040 task.stack:
ffffbfb2018b8000
Dec 31 07:47:37 laca-desktop kernel: RIP: 0010:__put_task_struct+0xf0/0x150
Dec 31 07:47:37 laca-desktop kernel: RSP: 0018:ffffbfb2018bbda0 EFLAGS:
00010246
Dec 31 07:47:37 laca-desktop kernel: RAX: 0000000000000000 RBX:
ffff99a1671bee10 RCX: 0000000000000001
Dec 31 07:47:37 laca-desktop kernel: RDX: ffffbfb2018bbe40 RSI:
ffff99a1671bee10 RDI: ffff99a1671bee10
Dec 31 07:47:37 laca-desktop kernel: RBP: ffffbfb2018bbdb0 R08:
0000000000001000 R09: 000000000000000c
Dec 31 07:47:37 laca-desktop kernel: R10: 0000000000000090 R11:
ffff99a16424000b R12: ffffbfb2018bbf18
Dec 31 07:47:37 laca-desktop kernel: R13: ffff99a169972200 R14:
ffff99a1671bee10 R15: ffff99a165e8d680
Dec 31 07:47:37 laca-desktop kernel: FS:  00007f2cd1f33980(0000)
GS:ffff99a17ec00000(0000) knlGS:0000000000000000
Dec 31 07:47:37 laca-desktop kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Dec 31 07:47:37 laca-desktop kernel: CR2: 000055a571c4aee9 CR3:
000000042c9ba000 CR4: 00000000000406f0
Dec 31 07:47:37 laca-desktop kernel: Call Trace:
Dec 31 07:47:37 laca-desktop kernel:  css_task_iter_next+0x74/0x80
Dec 31 07:47:37 laca-desktop kernel:  cgroup_procs_next+0x16/0x20
Dec 31 07:47:37 laca-desktop kernel:  cgroup_seqfile_next+0x1a/0x20
Dec 31 07:47:37 laca-desktop kernel:  kernfs_seq_next+0x27/0x60
Dec 31 07:47:37 laca-desktop kernel:  seq_read+0x2ce/0x3f0
Dec 31 07:47:37 laca-desktop kernel:  kernfs_fop_read+0x134/0x180
Dec 31 07:47:37 laca-desktop kernel:  ? security_file_permission+0x9b/0xc0
Dec 31 07:47:37 laca-desktop kernel:  __vfs_read+0x18/0x40
Dec 31 07:47:37 laca-desktop kernel:  vfs_read+0x8e/0x130
Dec 31 07:47:37 laca-desktop kernel:  SyS_read+0x55/0xc0
Dec 31 07:47:37 laca-desktop kernel:  system_call_fast_compare_end+0xc/0x97
Dec 31 07:47:37 laca-desktop kernel: RIP: 0033:0x7f2cd188e740
Dec 31 07:47:37 laca-desktop kernel: RSP: 002b:00007ffe6f18fda8 EFLAGS:
00000246 ORIG_RAX: 0000000000000000
Dec 31 07:47:37 laca-desktop kernel: RAX: ffffffffffffffda RBX:
000055a571ba0a50 RCX: 00007f2cd188e740
Dec 31 07:47:37 laca-desktop kernel: RDX: 0000000000001000 RSI:
000055a571b62850 RDI: 0000000000000019
Dec 31 07:47:37 laca-desktop kernel: RBP: 00007f2cd1b4a440 R08:
00007f2cd1b4e188 R09: 0000000000001010
Dec 31 07:47:37 laca-desktop kernel: R10: 0000000000000090 R11:
0000000000000246 R12: 0000000000000000
Dec 31 07:47:37 laca-desktop kernel: R13: 0000000000000000 R14:
0000000000000019 R15: 000055a571b91328
Dec 31 07:47:37 laca-desktop kernel: Code: 49 8b 94 24 d8 03 00 00 48 85 d2
74 06 f0 ff 4a 5c 74 2c 48 8b 3d 29 42 e5 00 4c 89 e6 e8 c9 a7 19 00 eb
Dec 31 07:47:37 laca-desktop kernel: ---[ end trace 3120a5605d2ee805 ]---
Dec 31 07:47:37 laca-desktop kernel: BUG: unable to handle kernel NULL
pointer dereference at 00000000000000b0
Dec 31 07:47:37 laca-desktop kernel: IP: pids_free+0x15/0x40
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