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[cpufreq] BUG: unable to handle kernel NULL pointer dereference at (null)

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fengguang.wu at intel

Aug 10, 2013, 10:53 PM

Post #1 of 2 (19 views)
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[cpufreq] BUG: unable to handle kernel NULL pointer dereference at (null)

Greetings,

I got the below dmesg and the first bad commit is

commit 01e3e82efc6742d5cf7ba14fb7a9bea318b386d8
Author: Lukasz Majewski <l.majewski [at] samsung>
Date: Tue Aug 6 22:53:08 2013 +0530

cpufreq: Store cpufreq policies in a list

Policies available in the cpufreq framework are now linked together.
They are accessible via cpufreq_policy_list defined in the cpufreq
core.

Signed-off-by: Lukasz Majewski <l.majewski [at] samsung>
Signed-off-by: Myungjoo Ham <myungjoo.ham [at] samsung>
Signed-off-by: Viresh Kumar <viresh.kumar [at] linaro>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki [at] intel>

[ 2.436910] Key type encrypted registered
[ 2.438327] RIO: rio_register_scan for mport_id=-1
[ 2.439366] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 2.440011] IP: [<ffffffff81af0a18>] __list_del_entry+0x148/0x320
[ 2.440011] PGD 0
[ 2.440011] Oops: 0000 [#1] PREEMPT
[ 2.440011] CPU: 0 PID: 1 Comm: swapper Not tainted 3.11.0-rc4-00455-g36b054d #4
[ 2.440011] task: ffff88000d848040 ti: ffff88000d84a000 task.ti: ffff88000d84a000
[ 2.440011] RIP: 0010:[<ffffffff81af0a18>] [<ffffffff81af0a18>] __list_del_entry+0x148/0x320
[ 2.440011] RSP: 0000:ffff88000d84bd70 EFLAGS: 00010046
[ 2.440011] RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000000
[ 2.440011] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84aeaaa8
[ 2.440011] RBP: ffff88000d84bd98 R08: 0000000000000000 R09: 0000000000000000
[ 2.440011] R10: 00000000004ee000 R11: 0000000000000002 R12: ffff88000ea24ab8
[ 2.440011] R13: 0000000000000000 R14: 0000000000000000 R15: dead000000200200
[ 2.440011] FS: 0000000000000000(0000) GS:ffffffff841dc000(0000) knlGS:0000000000000000
[ 2.440011] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 2.440011] CR2: 0000000000000000 CR3: 00000000041bf000 CR4: 00000000000006b0
[ 2.440011] Stack:
[ 2.440011] ffff88000ea24ab8 0000000000000206 ffffffff841d1a88 0000000000000000
[ 2.440011] 0000000000000000 ffff88000d84bdb0 ffffffff81af0c04 ffff88000ea24a00
[ 2.440011] ffff88000d84bdd0 ffffffff82928991 ffff88000ea24a00 00000000fffffffb
[ 2.440011] Call Trace:
[ 2.440011] [<ffffffff81af0c04>] list_del+0x14/0x40
[ 2.440011] [<ffffffff82928991>] cpufreq_policy_free+0x41/0x80
[ 2.440011] [<ffffffff8292a5aa>] cpufreq_add_dev+0x4ba/0x730
[ 2.440011] [<ffffffff81c85380>] subsys_interface_register+0x160/0x1b0
[ 2.440011] [<ffffffff8321398f>] ? _raw_write_unlock_irqrestore+0xcf/0x130
[ 2.440011] [<ffffffff8556c3d4>] ? cpufreq_gov_dbs_init+0x20/0x20
[ 2.440011] [<ffffffff8292c4fb>] cpufreq_register_driver+0x14b/0x2f0
[ 2.440011] [<ffffffff8556c533>] acpi_cpufreq_init+0x15f/0x33f
[ 2.440011] [<ffffffff854dba92>] do_one_initcall+0xdb/0x24e
[ 2.440011] [<ffffffff810f97d5>] ? parse_args+0x4a5/0x710
[ 2.440011] [<ffffffff854dbe32>] kernel_init_freeable+0x22d/0x364
[ 2.440011] [<ffffffff854dac42>] ? do_early_param+0x111/0x111
[ 2.440011] [<ffffffff831ac130>] ? rest_init+0x230/0x230
[ 2.440011] [<ffffffff831ac145>] kernel_init+0x15/0x290
[ 2.440011] [<ffffffff83214eea>] ret_from_fork+0x7a/0xb0
[ 2.440011] [<ffffffff831ac130>] ? rest_init+0x230/0x230
[ 2.440011] Code: 5d d8 4c 8b 65 e0 4c 8b 6d e8 4c 8b 75 f0 4c 8b 7d f8 c9 c3 0f 1f 80 00 00 00 00 48 ff 05 b9 b2 91 04 31 db 48 c7 c7 a8 aa ae 84 <4d> 39 26 0f 95 c3 31 d2 48 ff 05 a9 b2 91 04 89 de e8 f2 71 6e
[ 2.440011] RIP [<ffffffff81af0a18>] __list_del_entry+0x148/0x320
[ 2.440011] RSP <ffff88000d84bd70>
[ 2.440011] CR2: 0000000000000000
[ 2.440011] ---[ end trace eb3f9fd956cfd844 ]---

git bisect start 36b054d81c3c6dedf005a0602959820ba9d15d93 c095ba7224d8edc71dcef0d655911399a8bd4a3f --
git bisect good c3bdeb5c7cc073ccf5ff9624642022a8613a956e # 00:34 21+ net: move zerocopy_sg_from_iovec() to net/core/datagram.c
git bisect good 08ecb79b6612da03d9495df93a72fec1f6aa541f # 00:50 21+ Merge branch 'fixes-next' into linux-next
git bisect bad ca3fdce42013ca314bacaf0a943dd26589b86015 # 01:03 0- cpufreq: exynos5440: Fix to skip when new frequency same as current
git bisect bad 64e64e40ee2a31314677ff7df499370fa313f155 # 01:14 0- cpufreq: Use rwsem for protecting critical sections
git bisect good 89261dd1b26fd53882cbf9c24aa6dd2e57b34d83 # 01:26 21+ cpufreq: Pass policy to cpufreq_add_policy_cpu()
git bisect good 8bb2971b29c7d2a2619c100b86105e2fc4c8d4d5 # 01:36 21+ cpufreq: Clean up header files included in the core
git bisect good b41d7a570aad4427ae5eab57f6cc86b89fb99c57 # 01:50 21+ cpufreq: Use sizeof(*ptr) convetion for computing sizes
git bisect bad a239b157aa89dd451749999de8766bbaa3b5bbef # 01:58 0- cpufreq: Use cpufreq_policy_list for iterating over policies
git bisect bad 01e3e82efc6742d5cf7ba14fb7a9bea318b386d8 # 02:07 0- cpufreq: Store cpufreq policies in a list
git bisect good b41d7a570aad4427ae5eab57f6cc86b89fb99c57 # 02:30 63+ cpufreq: Use sizeof(*ptr) convetion for computing sizes
git bisect bad 36b054d81c3c6dedf005a0602959820ba9d15d93 # 02:30 0- Merge remote-tracking branch 'net-next/master' into devel-snb-x86_64-201308101718
git bisect bad 828880617293703c5e3d4f9d22fbb68fc0c5692a # 02:38 0- Revert "cpufreq: Store cpufreq policies in a list"
git bisect good 8ae3f1d09566038606a18576604ecc957a935c48 # 03:05 63+ Merge tag 'staging-3.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Thanks,
Fengguang

Attachments:

dmesg-kvm-lkp-snb01-34382-20130810173343-3.11.0-rc4-00455-g36b054d-4 (53.3 KB)

bisect-36b054d81c3c6dedf005a0602959820ba9d15d93-x86_64-randconfig-s06-0810-acpi_cpufreq_init+-x-50590.log (31.2 KB)

config-3.11.0-rc4-00455-g36b054d (71.4 KB)

viresh.kumar at linaro

Aug 11, 2013, 9:59 PM

Post #2 of 2 (8 views)
Permalink

Re: [cpufreq] BUG: unable to handle kernel NULL pointer dereference at (null) [In reply to]

On Sun, Aug 11, 2013 at 11:23 AM, Fengguang Wu <fengguang.wu [at] intel> wrote:
> Greetings,
>
> I got the below dmesg and the first bad commit is
>
> commit 01e3e82efc6742d5cf7ba14fb7a9bea318b386d8
> Author: Lukasz Majewski <l.majewski [at] samsung>
> Date: Tue Aug 6 22:53:08 2013 +0530
>
> cpufreq: Store cpufreq policies in a list
>
> Policies available in the cpufreq framework are now linked together.
> They are accessible via cpufreq_policy_list defined in the cpufreq
> core.
>
> Signed-off-by: Lukasz Majewski <l.majewski [at] samsung>
> Signed-off-by: Myungjoo Ham <myungjoo.ham [at] samsung>
> Signed-off-by: Viresh Kumar <viresh.kumar [at] linaro>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki [at] intel>

Its already fixed by: c88a1f8b96e7384627b918dfabbfc0c615a4a914 in Rafael's
bleeding-edge branch.. Thanks for reporting.
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