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Date: Fri, 7 Feb 2014 10:28:50 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Tejun Heo <tj@...nel.org>
Cc: cgroups@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [cgroup] BUG: unable to handle kernel NULL pointer dereference
Greetings,
I got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-post-kernfs-conversion
commit 0f23a4ecfbef2a707ddfd9d8359ae5220c8d76c1
Author: Tejun Heo <tj@...nel.org>
AuthorDate: Mon Feb 3 14:29:00 2014 -0500
Commit: Tejun Heo <tj@...nel.org>
CommitDate: Mon Feb 3 14:29:00 2014 -0500
cgroup: remove cgroup->name
+---------------------------------------------------------------------------------+--------------+--------------+
| | 7cff430cffc7 | 9cbc6246a800 |
+---------------------------------------------------------------------------------+--------------+--------------+
| boot_successes | 54 | 0 |
| boot_failures | 6 | 19 |
| Kernel_panic-not_syncing:No_working_init_found | 6 | |
| backtrace:panic | 6 | |
| BUG:unable_to_handle_kernel | 0 | 19 |
| BUG:unable_to_handle_kernel_NULL_pointer_dereferenceNULL_pointer_dereference_at | 0 | 19 |
| Oops | 0 | 19 |
| Oops:DEBUG_PAGEALLOCDEBUG_PAGEALLOC | 0 | 19 |
| EIP_is_at_kernfs_path_locked | 0 | 19 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 19 |
| backtrace:disk_events_workfn | 0 | 19 |
+---------------------------------------------------------------------------------+--------------+--------------+
[ 6.616956] usbcore: registered new interface driver keyspan_pda
[ 6.616956] usbcore: registered new interface driver keyspan_pda
[ 6.619153] usbserial: USB Serial support registered for Keyspan PDA
[ 6.619153] usbserial: USB Serial support registered for Keyspan PDA
[ 6.621546] usbserial: USB Serial support registered for Xircom / Entregra PGS - (prerenumeration)
[ 6.621546] usbserial: USB Serial support registered for Xircom / Entregra PGS - (prerenumeration)
[ 6.625016] driver ftdi-elan
[ 6.625016] driver ftdi-elan
[ 6.626390] BUG: unable to handle kernel
[ 6.626390] BUG: unable to handle kernel NULL pointer dereferenceNULL pointer dereference at 0000001c
at 0000001c
[ 6.628888] IP:
[ 6.628888] IP: [<c10ef404>] kernfs_path_locked+0x15/0x5c
[<c10ef404>] kernfs_path_locked+0x15/0x5c
[ 6.630640] *pde = 00000000
[ 6.630640] *pde = 00000000
[ 6.631599] Oops: 0000 [#1]
[ 6.631599] Oops: 0000 [#1] DEBUG_PAGEALLOCDEBUG_PAGEALLOC
[ 6.633000] Modules linked in:
[ 6.633000] Modules linked in:
[ 6.634124] CPU: 0 PID: 16 Comm: kworker/0:1 Not tainted 3.14.0-rc1-wl-ath-00992-g9cbc624 #2
[ 6.634124] CPU: 0 PID: 16 Comm: kworker/0:1 Not tainted 3.14.0-rc1-wl-ath-00992-g9cbc624 #2
[ 6.635001] Workqueue: events_freezable_power_ disk_events_workfn
[ 6.635001] Workqueue: events_freezable_power_ disk_events_workfn
[ 6.635001] task: cf4ee000 ti: cf4f0000 task.ti: cf4f0000
[ 6.635001] task: cf4ee000 ti: cf4f0000 task.ti: cf4f0000
[ 6.635001] EIP: 0060:[<c10ef404>] EFLAGS: 00010086 CPU: 0
[ 6.635001] EIP: 0060:[<c10ef404>] EFLAGS: 00010086 CPU: 0
[ 6.635001] EIP is at kernfs_path_locked+0x15/0x5c
[ 6.635001] EIP is at kernfs_path_locked+0x15/0x5c
[ 6.635001] EAX: 00000000 EBX: 00000000 ECX: cf4f1c44 EDX: cf4f1bc4
[ 6.635001] EAX: 00000000 EBX: 00000000 ECX: cf4f1c44 EDX: cf4f1bc4
[ 6.635001] ESI: cf4f1c43 EDI: 00000000 EBP: cf4f1b90 ESP: cf4f1b80
[ 6.635001] ESI: cf4f1c43 EDI: 00000000 EBP: cf4f1b90 ESP: cf4f1b80
[ 6.635001] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[ 6.635001] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
[ 6.635001] CR0: 8005003b CR2: 0000001c CR3: 0172f000 CR4: 00000690
[ 6.635001] CR0: 8005003b CR2: 0000001c CR3: 0172f000 CR4: 00000690
[ 6.635001] Stack:
[ 6.635001] Stack:
[ 6.635001] cf4f1bc4
[ 6.635001] cf4f1bc4 00000000 00000000 00000092 00000092 00000000 00000000 cf4f1ba8 cf4f1ba8 c10ef474 c10ef474 cf4f1bc4 cf4f1bc4
00000080 00000080
[ 6.635001] ce697a58
[ 6.635001] ce697a58 00000040 00000040 cf4f1c50 cf4f1c50 c122f801 c122f801 cf4ee438 cf4ee438 cf4ee000 cf4ee000 00000001 00000001
ce64a1f8 ce64a1f8
[ 6.635001] ce697a18
[ 6.635001] ce697a18 00000001 00000001 00000046 00000046 ce697a18 ce697a18 00000000 00000000 c1c311e8 c1c311e8 cf4f1c74 cf4f1c74
c122eebb c122eebb
[ 6.635001] Call Trace:
[ 6.635001] Call Trace:
[ 6.635001] [<c10ef474>] kernfs_path+0x29/0x3f
[ 6.635001] [<c10ef474>] kernfs_path+0x29/0x3f
[ 6.635001] [<c122f801>] cfq_find_alloc_queue+0x2d7/0x381
[ 6.635001] [<c122f801>] cfq_find_alloc_queue+0x2d7/0x381
git bisect start 9cbc6246a8001debc81dd3ccf8636ebe0348ffcc 38dbfb59d1175ef458d006556061adeaa8751b72 --
git bisect good d5ee1c1d299197f6625747f7cc7a96124722e104 # 19:15 19+ 19 Merge 'spi/fix/nuc900' into devel-hourly-2014020521
git bisect bad 6a85ae334d8dd720f2fc34aab76fd643074a0e59 # 19:46 0- 2 Merge 'usb/usb-linus' into devel-hourly-2014020521
git bisect good e41ba5b60e23bebb480c4a07de940c9db2111e08 # 20:21 20+ 20 Merge 'arm-perf/misc-patches' into devel-hourly-2014020521
git bisect good ec9f9cb128e86f1d12deb4922621c123cb37b4f7 # 20:57 20+ 20 Merge 'drm-intel/drm-intel-nightly' into devel-hourly-2014020521
git bisect bad 7939b799b88d4fbb782a1935169a8ff089c2bfce # 21:38 0- 5 Merge 'asoc/for-next' into devel-hourly-2014020521
git bisect bad 37edb03368ab460ea2fd5099467bd75d7f0dcd01 # 21:58 0- 2 Merge 'cgroup/review-post-kernfs-conversion' into devel-hourly-2014020521
git bisect good 7bac9560a270d2fca5b65893851aa29676db2f4e # 22:55 20+ 0 kernfs: add CONFIG_KERNFS
git bisect good c48b4c28016fdf927148616940279291d028cbc2 # 23:21 20+ 0 cgroup: introduce cgroup_ino()
git bisect good 044c79a581aa54cd9ba306f74d92fda6621a8ec1 # 23:53 20+ 0 cgroup: remove cftype_set
git bisect bad 0f23a4ecfbef2a707ddfd9d8359ae5220c8d76c1 # 00:13 0- 3 cgroup: remove cgroup->name
git bisect good 7cff430cffc79be4ca11d90b03fe8fd7feae580f # 00:39 20+ 0 cgroup: make cgroup hold onto its kernfs_node
# first bad commit: [0f23a4ecfbef2a707ddfd9d8359ae5220c8d76c1] cgroup: remove cgroup->name
git bisect good 7cff430cffc79be4ca11d90b03fe8fd7feae580f # 00:44 60+ 6 cgroup: make cgroup hold onto its kernfs_node
git bisect bad 9cbc6246a8001debc81dd3ccf8636ebe0348ffcc # 00:44 0- 19 0day head guard for 'devel-hourly-2014020521'
git bisect good ef42c58a5b4b8060a3931aab36bf2b4f81b44afc # 01:53 60+ 60 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 0cc2aa51be9d2f2b001c0e070b2e5cdde89b39f4 # 03:09 60+ 60 Add linux-next specific files for 20140206
Thanks,
Fengguang
View attachment "dmesg-yocto-inn-21:20140205223517:i386-randconfig-j5-02052126:3.14.0-rc1-wl-ath-00992-g9cbc624:2" of type "text/plain" (70779 bytes)
View attachment "config-3.14.0-rc1-wl-ath-00992-g9cbc624" of type "text/plain" (79951 bytes)
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