From: Fengguang Wu <fengguang.wu@intel.com>
To: lkp@lists.01.org
Subject: Re: [nand] BUG: unable to handle kernel NULL pointer dereference at 000005f4
Date: Mon, 14 Dec 2015 21:44:37 +0800 [thread overview]
Message-ID: <20151214134437.GA2003@wfg-t540p.sh.intel.com> (raw)
In-Reply-To: <20151214143613.68b08833@bbrezillon>
[-- Attachment #1: Type: text/plain, Size: 24945 bytes --]
On Mon, Dec 14, 2015 at 02:36:13PM +0100, Boris Brezillon wrote:
> On Mon, 14 Dec 2015 21:12:47 +0800
> Fengguang Wu <fengguang.wu@intel.com> wrote:
>
> > On Mon, Dec 14, 2015 at 02:04:33PM +0100, Boris Brezillon wrote:
> > > On Mon, 14 Dec 2015 13:58:09 +0100
> > > Boris Brezillon <boris.brezillon@free-electrons.com> wrote:
> > >
> > > > On Mon, 14 Dec 2015 20:47:19 +0800
> > > > Fengguang Wu <fengguang.wu@intel.com> wrote:
> > > >
> > > > > On Mon, Dec 14, 2015 at 11:42:44AM +0100, Boris Brezillon wrote:
> > > > > > Hi Fengguang,
> > > > > >
> > > > > > On Mon, 14 Dec 2015 14:45:37 +0800
> > > > > > Fengguang Wu <fengguang.wu@intel.com> wrote:
> > > > > >
> > > > > > > Hi Boris,
> > > > > > >
> > > > > > > On Sun, Dec 13, 2015 at 09:50:43PM +0100, Boris Brezillon wrote:
> > > > > > > > Hi Fengguang,
> > > > > > > >
> > > > > > > > On Sun, 13 Dec 2015 09:49:17 +0800
> > > > > > > > Fengguang Wu <fengguang.wu@intel.com> wrote:
> > > > > > > >
> > > > > > > > > Hi Boris,
> > > > > > > > >
> > > > > > > > > FYI, this happened when merging your branch, which indicates possible
> > > > > > > > > conflicts with other developer's patches or the new RC release.
> > > > > > > >
> > > > > > > > Is this boot test also run on my bbrezillon-0day/nand/layering-rework
> > > > > > > > branch (before merging it into devel-spot), and if it is, do you see the
> > > > > > > > same error?
> > > > > > >
> > > > > > > The bisect tests bbrezillon-0day/nand/layering-rework, however it's
> > > > > > > fine there.
> > > > > > >
> > > > > > > > Is the devel-spot-201512102358 tag publicly accessible? If it's not,
> > > > > > >
> > > > > > > Nope.
> > > > > > >
> > > > > > > > could you push it somewhere (or give me a way to generate it by
> > > > > > > > pulling the relevant branches), so that I can investigate on this bug?
> > > > > > >
> > > > > > > Or it may be more convenient to check linux-next first?
> > > > > > >
> > > > > > > FYI, the merged branches in devel-spot-201512102358 are:
> > > > > > >
> > > > > > > af8fc33 Merge 'bbrezillon-0day/nand/layering-rework' into devel-spot-201512102358
> > > > > > > acfc1de Merge 'linux-review/Maury-Markowitz/renaming-NTSC-file-because-it-doesnt-actually-use-8VSV-updating-channel-listings-add-channel-numbers/20151210-210449' into devel-spot-201512102358
> > > > > > > fb9daac Merge 'fdmanana/integration-4.4' into devel-spot-201512102358
> > > > > > > 1b30725 Merge 'fdmanana/for-chris-4.4' into devel-spot-201512102358
> > > > > > > 83f2246 Merge 'arm-integrator/realview-defconfig' into devel-spot-201512102358
> > > > > > > 03df745 Merge 'arm-integrator/realview-multiplatform-base' into devel-spot-201512102358
> > > > > > > d2aea29 Merge 'linux-review/Arnd-Bergmann/i2c-allow-building-emev2-without-slave-mode-again/20151210-211642' into devel-spot-201512102358
> > > > > > > e2f041d Merge 'arm-integrator/realview-base-armsoc' into devel-spot-201512102358
> > > > > > > 5c46550 Merge 'linux-review/Bert-Kenward/sfc-only-use-RSS-filters-if-we-re-using-RSS/20151210-213247' into devel-spot-201512102358
> > > > > > > d07f80f Merge 'sound/test/hdmi-jack' into devel-spot-201512102358
> > > > > > > 540f8b7 Merge 'sound/topic/hdmi-jack' into devel-spot-201512102358
> > > > > > > 9111fa0 Merge 'linux-review/matrandg-cisco-com/tc358743-Use-local-array-with-fixed-size-in-i2c-write/20151210-214154' into devel-spot-201512102358
> > > > > > > 3d81ef9 Merge 'linux-review/matrandg-cisco-com/tc358743-Print-timings-only-when-debug-level-is-set/20151210-220321' into devel-spot-201512102358
> > > > > > > 122e43c Merge 'bbrezillon-0day/nand/ecclayout-squashed' into devel-spot-201512102358
> > > > > > > e0572f8 Merge 'wireless-drivers-next/pending' into devel-spot-201512102358
> > > > > > > dc5d9c9 Merge 'linux-review/Geliang-Tang/list-introduce-list_is_first/20151210-222552' into devel-spot-201512102358
> > > > > > > 289e2a8 Merge 'linux-review/Arnd-Bergmann/staging-davinci_vfpe-allow-modular-build/20151210-223348' into devel-spot-201512102358
> > > > > > > d74c50d Merge 'linux-review/Damien-Horsley/Add-driver-for-Pistachio-internal-DAC/20151210-224304' into devel-spot-201512102358
> > > > > > > ee3c58b Merge 'cryptodev/master' into devel-spot-201512102358
> > > > > > > d390f7d Merge 'linux-review/John-Garry/hisi_sas-use-platform_get_irq/20151210-224851' into devel-spot-201512102358
> > > > > > > de31f5d Merge 'linux-review/Mike-Marciniszyn/staging-rdma-hfi1-add-definitions-for-OPA-traps/20151210-230158' into devel-spot-201512102358
> > > > > > > 5618568 Merge 'linux-review/Andrei-Emeltchenko/Bluetooth-h5-Do-not-initialize-Configuration-field/20151210-230440' into devel-spot-201512102358
> > > > > > > 759aa32 Merge 'linux-review/Moritz-K-nig/staging-COMEDI-checkpatch-pl-cleanups-in-comedi-h/20151210-230707' into devel-spot-201512102358
> > > > > > > 2edcbb4 Merge 'linux-review/Andy-Shevchenko/net-hns-annotate-IO-address-space-properly/20151210-232510' into devel-spot-201512102358
> > > > > > > 0f51fdd Merge 'integrity/next-kexec' into devel-spot-201512102358
> > > > > > > b32bcbc Merge 'dm/dm-4.5' into devel-spot-201512102358
> > > > > > > ea297f5 Merge 'linux-review/Mathieu-Desnoyers/thread_local_abi-system-call-caching-current-CPU-number-x86/20151210-234242' into devel-spot-201512102358
> > > > > > > 52bc163 Merge 'linux-review/yegorslists-googlemail-com/USB-serial-option-add-support-for-Quectel-UC20/20151210-234659' into devel-spot-201512102358
> > > > > > > 797cc7c Merge 'linux-review/Andy-Shevchenko/staging-rtl8188eu-provide-an-absolute-path-to-include-folder/20151210-234752' into devel-spot-201512102358
> > > > > > > 23d8b49 Merge 'omap-dss2/for-next' into devel-spot-201512102358
> > > > > > > 88a768f 0day base guard for 'devel-spot-201512102358'
> > > > > > > 527e931 Linux 4.4-rc4
> > > > > > >
> > > > > > > > >
> > > > > > > > > linux-next/master also has the problem.
> > > > > > > >
> > > > > > > > Okay. You mean linux-next/master alone, or after merging my branch into
> > > > > > > > linux-next/master?
> > > > > > >
> > > > > > > It's stand alone linux-next/master as indicated by the bisect log.
> > > > > > > Does it include any of your patches?
> > > > > >
> > > > > > I tried to boot the next-20151214 build, before [1] and after [2]
> > > > > > merging my nand/layering-rework branch merged into it, and both are
> > > > > > booting fine.
> > > > >
> > > > > Are you using the emailed kconfig? I'd not recommend try the below
> > > > > step if cannot even reproduce the issue in linux-next.
> > > >
> > > > Yes, I did use the config you attached in your email + the script your
> > > > pasted to boot the kernel with qemu, and linux-next/master boots
> > > > correctly.
> > > > As answered in the other email I just sent, I managed to reproduce the
> > > > bug you're pointing after merging both
> > > > bbrezillon-0day/nand/ecclayout-squashed and
> > > > bbrezillon-0day/nand/layering-rework into linus' 4.4-rc4.
> > > >
> > > >
> > >
> > > FYI, below is the patch I used to fix the bug, but I'd be interested in
> > > reproducing the problem you've seen on linux-next/master. Did you, by
> > > any chance, keep the branch/tag you used to trigger this bug on
> > > linux-next?
> >
> > Yes. Bisect log shows that these 2 commits both have the bug:
> >
> > # extra tests on tree/branch linus/master
> > git bisect bad a80c47daa818ead2644917d72ff2a934dd64fd16 # 03:36 0- 1 Merge tag 'sound-4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
>
> I just tested this commit, and it works fine on my side...
> Could you test it again?
You are so quick! Yes sorry, it has an independent NULL pointer bug
which shows up occasionally:
[ 12.547319] IRQ15 -> 0:15
[ 12.548468] .................................... done.
[ 12.549756] Using IPI No-Shortcut mode
[ 12.551116] page_owner is disabled
[ 12.560504] Btrfs loaded, assert=on
[ 12.561866] Key type encrypted registered
[ 12.572811] hd: no drives specified - use hd=cyl,head,sectors on kernel command line
[ 12.579517] BIOS EDD facility v0.16 2004-Jun-25, 6 devices found
[ 12.581027] ALSA device list:
[ 12.616063] #0: Dummy 1
[ 12.621496] #1: Loopback 1
[ 12.622959] Freeing unused kernel memory: 752K (c232b000 - c23e7000)
[ 12.624537] Write protecting the kernel text: 13296k
[ 12.626151] Write protecting the kernel read-only data: 5188k
[ 12.773226] power_supply test_ac: uevent
[ 12.774285] power_supply test_ac: POWER_SUPPLY_NAME=test_ac
[ 12.775584] power_supply test_ac: prop ONLINE=1
[ 12.779504] power_supply test_battery: uevent
[ 12.992439] power_supply test_ac: uevent
[ 13.001889] power_supply test_ac: POWER_SUPPLY_NAME=test_ac
[ 13.005496] power_supply test_ac: prop ONLINE=1
[ 13.006817] power_supply test_ac: uevent
[ 13.007779] power_supply test_ac: POWER_SUPPLY_NAME=test_ac
[ 13.009023] power_supply test_ac: prop ONLINE=1
[ 13.060458] power_supply test_battery: POWER_SUPPLY_NAME=test_battery
[ 13.061843] power_supply test_battery: prop STATUS=Discharging
[ 13.098699] power_supply test_battery: prop CHARGE_TYPE=Fast
[ 13.102617] power_supply test_battery: prop HEALTH=Good
[ 13.107691] VFS: could not find a valid V7 on nullb1.
[ 13.109527] power_supply test_battery: prop PRESENT=1
[ 13.110696] power_supply test_battery: prop TECHNOLOGY=Li-ion
[ 13.111991] power_supply test_battery: prop CHARGE_FULL_DESIGN=100
[ 13.132972] blk_update_request: I/O error, dev fd0, sector 0
[ 13.134261] floppy: error -5 while reading block 0
[ 13.136195] UDF-fs: warning (device nullb1): udf_fill_super: No partition found (2)
[ 13.138224] Mount JFS Failure: -22
[ 13.139195] befs: (nullb1): ---> befs_fill_super
[ 13.145252] power_supply test_battery: prop CHARGE_FULL=100
[ 13.147566] power_supply test_battery: prop CHARGE_NOW=50
[ 13.148807] power_supply test_battery: prop CAPACITY=50
[ 13.151282] VFS: could not find a valid V7 on nullb0.
[ 13.152800] blk_update_request: I/O error, dev fd0, sector 0
[ 13.154055] floppy: error -5 while reading block 0
[ 13.156211] befs: (nullb1): No write support. Marking filesystem read-only
[ 13.157672] befs: (nullb1): Using x86 superblock location
[ 13.158891] befs: (nullb1): invalid magic header
[ 13.160628] UDF-fs: warning (device nullb0): udf_fill_super: No partition found (2)
[ 13.162562] Mount JFS Failure: -22
[ 13.163492] power_supply test_battery: prop CAPACITY_LEVEL=Normal
[ 13.164826] power_supply test_battery: prop TIME_TO_EMPTY_AVG=3600
[ 13.168161] befs: (nullb0): ---> befs_fill_super
[ 13.169263] befs: (nullb0): No write support. Marking filesystem read-only
[ 13.170872] F2FS-fs (nullb1): Magic Mismatch, valid(0xf2f52010) - read(0x555507f7)
[ 13.172681] F2FS-fs (nullb1): Can't find valid F2FS filesystem in 1th superblock
[ 13.174493] blk_update_request: I/O error, dev fd0, sector 0
[ 13.175741] floppy: error -5 while reading block 0
[ 13.177178] power_supply test_battery: prop TIME_TO_FULL_NOW=3600
[ 13.178541] power_supply test_battery: prop MODEL_NAME=Test battery
[ 13.181684] befs: (nullb0): Using x86 superblock location
[ 13.182933] power_supply test_battery: prop MANUFACTURER=Linux
[ 13.184219] power_supply test_battery: prop SERIAL_NUMBER=4.4.0-rc4-00093-ga80c47d
[ 13.186005] power_supply test_battery: prop TEMP=26
[ 13.188144] befs: (nullb0): invalid magic header
[ 13.189285] F2FS-fs (nullb0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 13.190819] F2FS-fs (nullb1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 13.192306] F2FS-fs (nullb1): Can't find valid F2FS filesystem in 2th superblock
[ 13.195074] F2FS-fs (nullb0): Can't find valid F2FS filesystem in 1th superblock
[ 13.196900] blk_update_request: I/O error, dev fd0, sector 0
[ 13.198190] floppy: error -5 while reading block 0
[ 13.200371] F2FS-fs (nullb1): Magic Mismatch, valid(0xf2f52010) - read(0x555507f7)
[ 13.202173] F2FS-fs (nullb1): Can't find valid F2FS filesystem in 1th superblock
[ 13.203960] power_supply test_battery: prop VOLTAGE_NOW=3300
[ 13.207039] power_supply test_battery: uevent
[ 13.208114] power_supply test_battery: POWER_SUPPLY_NAME=test_battery
[ 13.209556] F2FS-fs (nullb0): Magic Mismatch, valid(0xf2f52010) - read(0x9)
[ 13.211029] F2FS-fs (nullb0): Can't find valid F2FS filesystem in 2th superblock
[ 13.212873] power_supply test_usb: uevent
[ 13.213861] power_supply test_usb: POWER_SUPPLY_NAME=test_usb
[ 13.215144] power_supply test_usb: prop ONLINE=1
[ 13.217515] power_supply test_battery: prop STATUS=Discharging
[ 13.218807] power_supply test_battery: prop CHARGE_TYPE=Fast
[ 13.220095] blk_update_request: I/O error, dev fd0, sector 0
[ 13.221346] floppy: error -5 while reading block 0
[ 13.222782] F2FS-fs (nullb1): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 13.224266] F2FS-fs (nullb1): Can't find valid F2FS filesystem in 2th superblock
[ 13.226687] power_supply test_battery: prop HEALTH=Good
[ 13.227924] power_supply test_battery: prop PRESENT=1
[ 13.229229] power_supply test_battery: prop TECHNOLOGY=Li-ion
[ 13.230547] F2FS-fs (nullb0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[ 13.232039] F2FS-fs (nullb0): Can't find valid F2FS filesystem in 1th superblock
[ 13.242809] blk_update_request: I/O error, dev fd0, sector 0
[ 13.244062] floppy: error -5 while reading block 0
[ 13.245636] power_supply test_usb: uevent
[ 13.263093] blk_update_request: I/O error, dev fd0, sector 0
[ 13.264382] floppy: error -5 while reading block 0
[ 13.271971] power_supply test_usb: POWER_SUPPLY_NAME=test_usb
[ 13.297889] power_supply test_battery: prop CHARGE_FULL_DESIGN=100
[ 13.337432] blk_update_request: I/O error, dev fd0, sector 0
[ 13.338722] floppy: error -5 while reading block 0
[ 13.347037] F2FS-fs (nullb0): Magic Mismatch, valid(0xf2f52010) - read(0x9)
[ 13.348529] F2FS-fs (nullb0): Can't find valid F2FS filesystem in 2th superblock
[ 13.360630] blk_update_request: I/O error, dev fd0, sector 0
[ 13.361898] floppy: error -5 while reading block 0
[ 13.416467] blk_update_request: I/O error, dev fd0, sector 0
[ 13.417755] floppy: error -5 while reading block 0
[ 13.467319] power_supply test_usb: prop ONLINE=1
[ 13.472666] power_supply test_battery: prop CHARGE_FULL=100
[ 13.490142] floppy: error -5 while reading block 0
[ 13.492079] power_supply test_battery: prop CHARGE_NOW=50
[ 13.493350] power_supply test_battery: prop CAPACITY=50
[ 13.494555] power_supply test_battery: prop CAPACITY_LEVEL=Normal
[ 13.495902] power_supply test_battery: prop TIME_TO_EMPTY_AVG=3600
[ 13.519334] floppy: error -5 while reading block 0
[ 13.521736] power_supply test_battery: prop TIME_TO_FULL_NOW=3600
[ 13.523549] power_supply test_battery: prop MODEL_NAME=Test battery
[ 13.524917] power_supply test_battery: prop MANUFACTURER=Linux
[ 13.539749] floppy: error -5 while reading block 0
[ 13.542894] power_supply test_battery: prop SERIAL_NUMBER=4.4.0-rc4-00093-ga80c47d
[ 13.544793] power_supply test_battery: prop TEMP=26
[ 13.545943] power_supply test_battery: prop VOLTAGE_NOW=3300
[ 13.572913] floppy: error -5 while reading block 0
[ 13.597396] floppy: error -5 while reading block 0
[ 13.616150] floppy: error -5 while reading block 0
[ 13.636152] floppy: error -5 while reading block 0
[ 13.656146] floppy: error -5 while reading block 0
[ 13.676160] floppy: error -5 while reading block 0
[ 13.696152] floppy: error -5 while reading block 0
[ 13.716152] floppy: error -5 while reading block 0
[ 13.736152] floppy: error -5 while reading block 0
[ 13.758396] floppy: error -5 while reading block 0
[ 13.784390] floppy: error -5 while reading block 0
[ 13.806150] floppy: error -5 while reading block 0
[ 13.850819] floppy: error -5 while reading block 0
[ 13.851977] ------------[ cut here ]------------
[ 13.853076] WARNING: CPU: 0 PID: 6 at kernel/locking/lockdep.c:3183 __lock_acquire+0x99e/0xd90()
[ 13.855335] DEBUG_LOCKS_WARN_ON(id >= MAX_LOCKDEP_KEYS)
[ 13.856230] CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 4.4.0-rc4-00093-ga80c47d #2
[ 13.871377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 13.873304] Workqueue: floppy fd_timer_workfn
[ 13.874385] 00000000 00000000 cece7cb0 c1487672 cece7cf0 cece7ce0 c1051f4e c2085bed
[ 13.876896] cece7d0c 00000006 c208f2d4 00000c6f c1095e7e c1095e7e cece852c 00000003
[ 13.879403] cece8000 cece7cf8 c1051fce 00000009 cece7cf0 c2085bed cece7d0c cece7d30
[ 13.886926] Call Trace:
[ 13.887623] [<c1487672>] dump_stack+0x4b/0x79
[ 13.888636] [<c1051f4e>] warn_slowpath_common+0x7e/0xb0
[ 13.889768] [<c1095e7e>] ? __lock_acquire+0x99e/0xd90
[ 13.890965] [<c1095e7e>] ? __lock_acquire+0x99e/0xd90
[ 13.892106] [<c1051fce>] warn_slowpath_fmt+0x2e/0x30
[ 13.893105] [<c1095e7e>] __lock_acquire+0x99e/0xd90
[ 13.894281] [<c1096b37>] lock_acquire+0x77/0xa0
[ 13.895313] [<c108ac1b>] ? complete+0x1b/0x50
[ 13.896319] [<c1cf949f>] _raw_spin_lock_irqsave+0x4f/0x70
[ 13.897484] [<c108ac1b>] ? complete+0x1b/0x50
[ 13.898459] [<c108ac1b>] complete+0x1b/0x50
[ 13.912483] [<c17cd38e>] floppy_rb0_cb+0x1e/0x50
[ 13.913609] [<c14650c8>] bio_endio+0x38/0x70
[ 13.914647] [<c1469e95>] blk_update_request+0x85/0x2c0
[ 13.915822] [<c146a0e8>] blk_update_bidi_request+0x18/0x90
[ 13.917091] [<c146a300>] __blk_end_bidi_request+0x20/0x40
[ 13.918352] [<c146a462>] __blk_end_request+0x12/0x20
[ 13.919551] [<c17ccaeb>] floppy_end_request+0x5b/0x90
[ 13.920757] [<c17ccbd7>] request_done+0xb7/0x180
[ 13.921860] [<c17ca9f8>] ? disk_change+0xd8/0x340
[ 13.940617] [<c17cfbc3>] floppy_ready+0x5c3/0x6b0
[ 13.941774] [<c1065e1a>] ? process_one_work+0xfa/0x400
[ 13.942984] [<c17ca759>] fd_timer_workfn+0x9/0x10
[ 13.944132] [<c1065e95>] process_one_work+0x175/0x400
[ 13.945314] [<c1065e1a>] ? process_one_work+0xfa/0x400
[ 13.946522] [<c1066159>] worker_thread+0x39/0x430
[ 13.947671] [<c1066120>] ? process_one_work+0x400/0x400
[ 13.948897] [<c106b9ac>] kthread+0xac/0xc0
[ 13.949925] [<c107085b>] ? finish_task_switch+0xbb/0x290
[ 13.951167] [<c1cf9f29>] ret_from_kernel_thread+0x21/0x38
[ 13.952412] [<c106b900>] ? __kthread_unpark+0x70/0x70
[ 13.953601] ---[ end trace 1e31e1e3e1c50347 ]---
[ 13.954713] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 13.956462] IP: [< (null)>] (null)
[ 13.957508] *pde = 00000000
[ 13.958424] Oops: 0010 [#1] PREEMPT SMP
[ 13.959713] CPU: 0 PID: 6 Comm: kworker/u2:0 Tainted: G W 4.4.0-rc4-00093-ga80c47d #2
[ 13.961774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 13.963837] Workqueue: floppy fd_timer_workfn
[ 13.965004] task: cece8000 ti: cece6000 task.ti: cece6000
[ 13.966241] EIP: 0060:[<00000000>] EFLAGS: 00010002 CPU: 0
[ 13.967487] EIP is at 0x0
[ 13.968257] EAX: cd6a9674 EBX: cd6a9674 ECX: 00000000 EDX: 00000003
[ 13.969646] ESI: fffffff4 EDI: 00000000 EBP: cece7d70 ESP: cece7d4c
[ 13.971012] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 13.972258] CR0: 80050033 CR2: 00000000 CR3: 0d752000 CR4: 00140690
[ 13.973650] Stack:
[ 13.974319] c108a415 00000000 00000001 cd6dbd48 00000003 00000000 cd6dbd28 cd6dbd24
[ 13.976968] 00000092 cece7d80 c108a6ea 00000000 00000000 cece7d94 c108ac30 cd6dbd20
[ 13.979653] 00000000 00001000 cece7dac c17cd38e c217ba9c fffffffb cd6dbcd0 00001000
[ 13.982339] Call Trace:
[ 13.983074] [<c108a415>] ? __wake_up_common+0x45/0x70
[ 13.984183] [<c108a6ea>] __wake_up_locked+0x1a/0x20
[ 13.985325] [<c108ac30>] complete+0x30/0x50
[ 13.986368] [<c17cd38e>] floppy_rb0_cb+0x1e/0x50
[ 13.987490] [<c14650c8>] bio_endio+0x38/0x70
[ 13.988539] [<c1469e95>] blk_update_request+0x85/0x2c0
[ 13.989763] [<c146a0e8>] blk_update_bidi_request+0x18/0x90
[ 13.991043] [<c146a300>] __blk_end_bidi_request+0x20/0x40
[ 13.992311] [<c146a462>] __blk_end_request+0x12/0x20
[ 13.993497] [<c17ccaeb>] floppy_end_request+0x5b/0x90
[ 13.994701] [<c17ccbd7>] request_done+0xb7/0x180
[ 13.995830] [<c17ca9f8>] ? disk_change+0xd8/0x340
[ 13.996963] [<c17cfbc3>] floppy_ready+0x5c3/0x6b0
[ 13.998103] [<c1065e1a>] ? process_one_work+0xfa/0x400
[ 13.999312] [<c17ca759>] fd_timer_workfn+0x9/0x10
[ 14.000477] [<c1065e95>] process_one_work+0x175/0x400
[ 14.001643] [<c1065e1a>] ? process_one_work+0xfa/0x400
[ 14.002815] [<c1066159>] worker_thread+0x39/0x430
[ 14.004015] [<c1066120>] ? process_one_work+0x400/0x400
[ 14.005207] [<c106b9ac>] kthread+0xac/0xc0
[ 14.006222] [<c107085b>] ? finish_task_switch+0xbb/0x290
[ 14.007442] [<c1cf9f29>] ret_from_kernel_thread+0x21/0x38
[ 14.008679] [<c106b900>] ? __kthread_unpark+0x70/0x70
[ 14.009956] Code: Bad EIP value.
[ 14.011033] EIP: [<00000000>] 0x0 SS:ESP 0068:cece7d4c
[ 14.012440] CR2: 0000000000000000
[ 14.013384] ---[ end trace 1e31e1e3e1c50348 ]---
[ 14.014494] Kernel panic - not syncing: Fatal exception
[ 14.015702] Kernel Offset: disabled
> > # extra tests on tree/branch linux-next/master
> > git bisect bad 8225f4e85cb03daea14661380745886ce01fd83a # 03:42 0- 3 Add linux-next specific files for 20151210
>
> Hm, unfortunately I can't checkout this commit (it comes from linux-next
> and it's been rebased/regenerated since then).
Sorry, that's one more independent NULL pointer bug.
There are so many noises!
[ 9.918393] floppy: error -5 while reading block 0
[ 9.938396] floppy: error -5 while reading block 0
Kernel tests: Boot OK!
[ 10.649260] random: trinity urandom read with 53 bits of entropy available
[ 20.702989] sock: process `trinity-main' is using obsolete setsockopt SO_BSDCOMPAT
[ 20.825027] BUG: unable to handle kernel NULL pointer dereference at 0000019c
[ 20.825033] IP: [<c10deef1>] perf_prepare_sample+0x271/0x3a0
[ 20.825034] *pde = 00000000
[ 20.825036] Oops: 0000 [#1] PREEMPT SMP
[ 20.825039] CPU: 0 PID: 686 Comm: trinity-main Not tainted 4.4.0-rc4-next-20151210 #1
[ 20.825040] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 20.825041] task: cd6bad00 ti: cd49e000 task.ti: cd49e000
[ 20.825042] EIP: 0060:[<c10deef1>] EFLAGS: 00010006 CPU: 0
[ 20.825043] EIP is at perf_prepare_sample+0x271/0x3a0
[ 20.825044] EAX: 0000019c EBX: cd49fd54 ECX: cd49fe40 EDX: 0d64b000
[ 20.825045] ESI: 0002e3e9 EDI: cd71d800 EBP: cd49fd3c ESP: cd49fd24
[ 20.825046] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 20.825046] CR0: 80050033 CR2: 0000019c CR3: 0db9e000 CR4: 00140690
[ 20.825049] Stack:
[ 20.825052] 00000000 00000000 cd49fe40 cd71d800 cd49fe40 cfa4da40 cd49fd80 c10df073
[ 20.825059] cfa4da40 00000000 00000000 c10df020 00000009 00500001 cd6bad00 01000002
[ 20.825062] 00000002 00000000 00000000 cd71d800 00000000 cd71d800 00000000 cd49fda8
[ 20.825062] Call Trace:
[ 20.825065] [<c10df073>] perf_event_output+0x53/0xb0
[ 20.825066] [<c10df020>] ? perf_prepare_sample+0x3a0/0x3a0
[ 20.825068] [<c10df305>] __perf_event_overflow+0x235/0x260
[ 20.825070] [<c10dfb9f>] perf_swevent_overflow+0x4f/0x90
[ 20.825071] [<c10dfcad>] perf_swevent_event+0xcd/0x100
[ 20.825073] [<c10e0154>] ___perf_sw_event+0x1c4/0x220
[ 20.825075] [<c10dffb2>] ? ___perf_sw_event+0x22/0x220
[ 20.825077] [<c10945b6>] ? __lock_is_held+0x46/0x60
[ 20.825080] [<c1d0b8a2>] ? schedule+0x32/0x90
[ 20.825082] [<c10959b0>] ? __lock_acquire+0x4c0/0xd90
[ 20.825083] [<c10945b6>] ? __lock_is_held+0x46/0x60
[ 20.825084] [<c10945b6>] ? __lock_is_held+0x46/0x60
[ 20.825085] [<c1d0b381>] __schedule+0x511/0x9d0
[ 20.825086] [<c1d0b8a2>] schedule+0x32/0x90
[ 20.825088] [<c1000dd0>] exit_to_usermode_loop+0x70/0xa0
[ 20.825090] [<c1001047>] prepare_exit_to_usermode+0x27/0x30
[ 20.825092] [<c1d10e3a>] resume_userspace+0xe/0x14
[ 20.825093] [<c1d10000>] ? ldsem_down_read+0x10/0x90
[ 20.825111] Code: 00 00 00 c7 41 3c 00 00 00 00 89 41 38 0f 84 0c fe ff ff 8b 55 08 89 f8 e8 6d 3e 00 00 8b 4d f0 85 c0 89 41 68 0f 84 ff 00 00 00 <8b> 00 8d 04 c5 08 00 00 00 0f b7 c0 66 01 43 06 e9 df fd ff ff
[ 20.825113] EIP: [<c10deef1>] perf_prepare_sample+0x271/0x3a0 SS:ESP 0068:cd49fd24
[ 20.825114] CR2: 000000000000019c
[ 20.825116] ---[ end trace ea295fc74974f372 ]---
[ 20.825117] Kernel panic - not syncing: Fatal exception
Thanks,
Fengguang
next prev parent reply other threads:[~2015-12-14 13:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-13 1:49 [nand] BUG: unable to handle kernel NULL pointer dereference at 000005f4 Fengguang Wu
2015-12-13 20:50 ` Boris Brezillon
2015-12-14 6:45 ` Fengguang Wu
2015-12-14 10:42 ` Boris Brezillon
2015-12-14 12:47 ` Fengguang Wu
2015-12-14 12:58 ` Boris Brezillon
2015-12-14 13:04 ` Boris Brezillon
2015-12-14 13:12 ` Fengguang Wu
2015-12-14 13:36 ` Boris Brezillon
2015-12-14 13:44 ` Fengguang Wu [this message]
2015-12-14 12:54 ` Boris Brezillon
2015-12-14 13:05 ` Fengguang Wu
2015-12-14 13:22 ` Boris Brezillon
2015-12-14 13:29 ` Fengguang Wu
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