Arch Linux

Kotrfa

Member

Registered: 2012-10-25

Posts: 213

kernel bug "unable to handle kernel null pointer" [solved]

Hello,

without noticing the cause, "sometimes" I'm getting kernel bug error. Everything freeze - no mouse, no ctrl+alt+function to change tty, even SSH access from outside doesn't work. I have to turn off my laptop manually. This is the the output from journalctl. Thank you

Nov 13 14:36:05 530uarch kernel: BUG: unable to handle kernel NULL pointer dereference at 000000000000001c
Nov 13 14:36:05 530uarch kernel: IP: [<ffffffff811a3299>] mmu_notifier_unregister+0x19/0xe0
Nov 13 14:36:05 530uarch kernel: PGD d5127067 PUD d50c6067 PMD 0 
Nov 13 14:36:05 530uarch kernel: Oops: 0000 [#1] PREEMPT SMP 
Nov 13 14:36:05 530uarch kernel: Modules linked in: hidp hid rfcomm bnep ecb uvcvideo videobuf2_vmalloc videobuf2_memop
Nov 13 14:36:05 530uarch kernel:  soundcore evdev mei dell_smo8800 mac_hid processor ac ext4 crc16 mbcache jbd2 sd_mod 
Nov 13 14:36:05 530uarch kernel: CPU: 1 PID: 9119 Comm: kworker/1:1 Not tainted 3.17.2-1-ARCH #1
Nov 13 14:36:05 530uarch kernel: Hardware name: SAMSUNG ELECTRONICS CO., LTD. 530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/5
Nov 13 14:36:05 530uarch kernel: Workqueue: events __i915_mm_struct_free__worker [i915]
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel: task: ffff8800783beeb0 ti: ffff8800baa80000 task.ti: ffff8800baa80000
Nov 13 14:36:05 530uarch kernel: RIP: 0010:[<ffffffff811a3299>] 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff811a3299>] mmu_notifier_unregister+0x19/0xe0
Nov 13 14:36:05 530uarch kernel: RSP: 0018:ffff8800baa83dd8  EFLAGS: 00010202
Nov 13 14:36:05 530uarch kernel: RAX: 0000000000000004 RBX: ffff880186fcb990 RCX: ffff88019fa53dd8
Nov 13 14:36:05 530uarch kernel: RDX: ffff88019fa53dd8 RSI: ffff880195fba300 RDI: 0000000000000014
Nov 13 14:36:05 530uarch kernel: RBP: ffff8800baa83df0 R08: ffff8800baa80000 R09: 0000000000000000
Nov 13 14:36:05 530uarch kernel: R10: 0000000000042092 R11: ffff8800d590be18 R12: fffffffffffffffc
Nov 13 14:36:05 530uarch kernel: R13: ffff880186fcb960 R14: 0000000000000000 R15: ffff88019fa58000
Nov 13 14:36:05 530uarch kernel: FS:  0000000000000000(0000) GS:ffff88019fa40000(0000) knlGS:0000000000000000
Nov 13 14:36:05 530uarch kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 13 14:36:05 530uarch kernel: CR2: 000000000000001c CR3: 00000000d2b3a000 CR4: 00000000000407e0
Nov 13 14:36:05 530uarch kernel: Stack:
Nov 13 14:36:05 530uarch kernel:  ffff880186fcb990
Nov 13 14:36:05 530uarch kernel:  fffffffffffffffc
Nov 13 14:36:05 530uarch kernel:  ffff880186fcb960
Nov 13 14:36:05 530uarch kernel:  ffff8800baa83e18
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  ffffffffa00b6d0c
Nov 13 14:36:05 530uarch kernel:  ffff880186fcb990
Nov 13 14:36:05 530uarch kernel:  ffff88018b63f9c0
Nov 13 14:36:05 530uarch kernel:  ffff88019fa53dc0
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  ffff8800baa83e58
Nov 13 14:36:05 530uarch kernel:  ffffffff81088b85
Nov 13 14:36:05 530uarch kernel:  00ff880100000000
Nov 13 14:36:05 530uarch kernel:  ffff88018b63f9c0
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel: Call Trace:
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffffa00b6d0c>] __i915_mm_struct_free__worker+0x2c/0x70 [i915]
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff81088b85>] process_one_work+0x145/0x400
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff8108914b>] worker_thread+0x6b/0x4a0
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff810890e0>] ? init_pwq.part.22+0x10/0x10
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff8108e06a>] kthread+0xea/0x100
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff8108df80>] ? kthread_create_on_node+0x1b0/0x1b0
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff8153c6fc>] ret_from_fork+0x7c/0xb0
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff8108df80>] ? kthread_create_on_node+0x1b0/0x1b0
Nov 13 14:36:05 530uarch kernel: Code: 
Nov 13 14:36:05 530uarch kernel: ff 
Nov 13 14:36:05 530uarch kernel: ff 
Nov 13 14:36:05 530uarch kernel: 5d 
Nov 13 14:36:05 530uarch kernel: c3 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 2e 
Nov 13 14:36:05 530uarch kernel: 0f 
Nov 13 14:36:05 530uarch kernel: 1f 
Nov 13 14:36:05 530uarch kernel: 84 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 66 
Nov 13 14:36:05 530uarch kernel: 90 
Nov 13 14:36:05 530uarch kernel: 8b 
Nov 13 14:36:05 530uarch kernel: 46 
Nov 13 14:36:05 530uarch kernel: 4c 
Nov 13 14:36:05 530uarch kernel: 85 
Nov 13 14:36:05 530uarch kernel: c0 
Nov 13 14:36:05 530uarch kernel: 0f 
Nov 13 14:36:05 530uarch kernel: 8e 
Nov 13 14:36:05 530uarch kernel: c0 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 55 
Nov 13 14:36:05 530uarch kernel: 48 
Nov 13 14:36:05 530uarch kernel: 89 
Nov 13 14:36:05 530uarch kernel: e5 
Nov 13 14:36:05 530uarch kernel: 41 
Nov 13 14:36:05 530uarch kernel: 55 
Nov 13 14:36:05 530uarch kernel: 41 
Nov 13 14:36:05 530uarch kernel: 54 
Nov 13 14:36:05 530uarch kernel: 53 
Nov 13 14:36:05 530uarch kernel: <48> 
Nov 13 14:36:05 530uarch kernel: 83 
Nov 13 14:36:05 530uarch kernel: 7f 
Nov 13 14:36:05 530uarch kernel: 08 
Nov 13 14:36:05 530uarch kernel: 00 
Nov 13 14:36:05 530uarch kernel: 48 
Nov 13 14:36:05 530uarch kernel: 89 
Nov 13 14:36:05 530uarch kernel: f3 
Nov 13 14:36:05 530uarch kernel: 49 
Nov 13 14:36:05 530uarch kernel: 89 
Nov 13 14:36:05 530uarch kernel: fc 
Nov 13 14:36:05 530uarch kernel: 74 
Nov 13 14:36:05 530uarch kernel: 76 
Nov 13 14:36:05 530uarch kernel: 48 
Nov 13 14:36:05 530uarch kernel: c7 
Nov 13 14:36:05 530uarch kernel: c7 
Nov 13 14:36:05 530uarch kernel: 80 
Nov 13 14:36:05 530uarch kernel: 78 
Nov 13 14:36:05 530uarch kernel: b0 
Nov 13 14:36:05 530uarch kernel: 81 
Nov 13 14:36:05 530uarch kernel: e8 
Nov 13 14:36:05 530uarch kernel: 
Nov 13 14:36:05 530uarch kernel: RIP 
Nov 13 14:36:05 530uarch kernel:  [<ffffffff811a3299>] mmu_notifier_unregister+0x19/0xe0
Nov 13 14:36:05 530uarch kernel:  RSP <ffff8800baa83dd8>
Nov 13 14:36:05 530uarch kernel: CR2: 000000000000001c
Nov 13 14:36:05 530uarch kernel: ---[ end trace d97e0df8c2ad1f4b ]---
Nov 13 14:36:05 530uarch kernel: BUG: unable to handle kernel 
Nov 13 14:36:05 530uarch kernel: paging request at ffffffffffffffd8
Nov 13 14:36:05 530uarch kernel: IP: [<ffffffff8108e720>] kthread_data+0x10/0x20

Last edited by Kotrfa (2015-01-16 22:37:48)

Potomac

Member

Registered: 2011-12-25

Posts: 532

Re: kernel bug "unable to handle kernel null pointer" [solved]

check the bugzilla of archlinux,

it seems a bug related to i915, a patch was proposed and this problem may have been fixed in kernel 3.18rc4 mainline ( AUR package )

Kotrfa

Member

Registered: 2012-10-25

Posts: 213

Re: kernel bug "unable to handle kernel null pointer" [solved]

I've found the problem. It happen only when I run Oracle's JavaFX Scene Builder. The 64-bit version. No trace log, of course...

So be aware of it! Do you still think it's a same bug? I haven't found the relevant one on bugzilla.

Last edited by Kotrfa (2014-11-16 20:18:25)

jakub

Member

Registered: 2013-09-14

Posts: 151

Re: kernel bug "unable to handle kernel null pointer" [solved]

https://bugs.archlinux.org/task/42353

update your kernel to 3.17.3 (https://www.kernel.org/pub/linux/kernel … Log-3.17.3)

Kotrfa

Member

Registered: 2012-10-25

Posts: 213

Re: kernel bug "unable to handle kernel null pointer" [solved]

I confirm that with new kernel version it works OK. I can use JavaFX Scene Builder without any problem now (no crash for several days, before it was in few seconds of using it).