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Message-ID: <877fjpn9yz.fsf@yhuang-dev.intel.com>
Date: Mon, 04 Jan 2016 14:18:44 +0800
From: kernel test robot <ying.huang@...ux.intel.com>
TO: Aditya Kali <adityakali@...gle.com>
CC: Serge Hallyn <serge.hallyn@...ntu.com>
Subject: [lkp] [cgroup] e9a3e09d1a: WARNING: CPU: 0 PID: 17 at
kernel/cgroup.c:1157 cset_cgroup_from_root+0x95/0xaf()
FYI, we noticed the below changes on
https://git.kernel.org/pub/scm/linux/kernel/git/sergeh/linux-security 2016-01-02/cgroupns
commit e9a3e09d1af60e945f45a4de6a0e69c2d793a2b5 ("cgroup: introduce cgroup namespaces")
+-----------------------------------------------------+------------+------------+
| | f2a74e2f95 | e9a3e09d1a |
+-----------------------------------------------------+------------+------------+
| boot_successes | 279 | 0 |
| boot_failures | 17 | 8 |
| WARNING:at_kernel/trace/ftrace.c:#ftrace_bug() | 13 | |
| backtrace:perf_ftrace_event_register | 13 | |
| backtrace:perf_trace_init | 13 | |
| backtrace:perf_tp_event_init | 13 | |
| backtrace:perf_try_init_event | 13 | |
| backtrace:SYSC_perf_event_open | 13 | |
| backtrace:SyS_perf_event_open | 13 | |
| invoked_oom-killer:gfp_mask=0x | 2 | |
| Mem-Info | 2 | |
| Out_of_memory:Kill_process | 2 | |
| backtrace:vfs_write | 2 | |
| backtrace:SyS_write | 2 | |
| backtrace:do_sys_open | 2 | 8 |
| backtrace:SyS_open | 2 | 8 |
| backtrace:_do_fork | 2 | 1 |
| backtrace:call_usermodehelper_exec_work | 1 | |
| backtrace:vfs_read | 2 | |
| backtrace:SyS_read | 2 | |
| backtrace:iterate_dir | 1 | |
| backtrace:SyS_getdents | 1 | |
| backtrace:SYSC_newstat | 1 | |
| backtrace:SyS_newstat | 1 | |
| BUG:kernel_test_oversize | 2 | |
| WARNING:at_kernel/cgroup.c:#cset_cgroup_from_root() | 0 | 8 |
| backtrace:disk_events_workfn | 0 | 8 |
| backtrace:do_mount | 0 | 8 |
| backtrace:SyS_mount | 0 | 8 |
| backtrace:nilfs_load_super_block | 0 | 1 |
| backtrace:init_nilfs | 0 | 2 |
| backtrace:do_group_exit | 0 | 4 |
| backtrace:SyS_exit_group | 0 | 4 |
| backtrace:floppy_work_workfn | 0 | 7 |
| backtrace:fd_timer_workfn | 0 | 7 |
| backtrace:SyS_clone | 0 | 1 |
| backtrace:floppy_shutdown | 0 | 1 |
+-----------------------------------------------------+------------+------------+
[ 19.540438] ide-cd: hdc: ATAPI 4X DVD-ROM drive, 512kB Cache
[ 19.541746] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 19.563486] ------------[ cut here ]------------
[ 19.564728] WARNING: CPU: 0 PID: 17 at kernel/cgroup.c:1157 cset_cgroup_from_root+0x95/0xaf()
[ 19.585876] Modules linked in:
[ 19.586889] CPU: 0 PID: 17 Comm: kworker/0:1 Not tainted 4.4.0-rc1-00024-ge9a3e09 #58
[ 19.588876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 19.591039] Workqueue: events_freezable_power_ disk_events_workfn
[ 19.625617] 0000000000000000 ffff88003155b8b8 ffffffff8173d2e1 0000000000000000
[ 19.630088] ffff88003155b8f0 ffffffff810d87a1 ffffffff81154dfb ffffffff84079520
[ 19.632139] ffffffff856510a0 ffffffff856510b0 0000000000000000 ffff88003155b900
[ 19.634262] Call Trace:
[ 19.635114] [<ffffffff8173d2e1>] dump_stack+0x4b/0x63
[ 19.657228] [<ffffffff810d87a1>] warn_slowpath_common+0x99/0xb2
[ 19.658679] [<ffffffff81154dfb>] ? cset_cgroup_from_root+0x95/0xaf
[ 19.660083] [<ffffffff810d886d>] warn_slowpath_null+0x1a/0x1c
[ 19.661424] [<ffffffff81154dfb>] cset_cgroup_from_root+0x95/0xaf
[ 19.703860] [<ffffffff81154e3c>] cgroup_path_ns+0x27/0x59
[ 19.705345] [<ffffffff81154e83>] cgroup_path+0x15/0x17
[ 19.706682] [<ffffffff81735f02>] blkg_path+0x15/0x4f
[ 19.726338] [<ffffffff8173816a>] cfq_get_queue+0x287/0x305
[ 19.727740] [<ffffffff81116101>] ? lock_acquire+0x10a/0x196
[ 19.729046] [<ffffffff81116101>] ? lock_acquire+0x10a/0x196
[ 19.730345] [<ffffffff81113b31>] ? lock_acquired+0xfc/0x2cb
[ 19.731680] [<ffffffff81738244>] ? cfq_set_request+0x5c/0x29e
[ 19.755988] [<ffffffff8173831c>] cfq_set_request+0x134/0x29e
[ 19.757389] [<ffffffff81114b19>] ? mark_held_locks+0x5e/0x74
[ 19.760761] [<ffffffff82e15a03>] ? _raw_spin_unlock_irq+0x2c/0x3b
[ 19.762057] [<ffffffff81114caa>] ? trace_hardirqs_on_caller+0x17b/0x197
[ 19.763413] [<ffffffff81114cd3>] ? trace_hardirqs_on+0xd/0xf
[ 19.782666] [<ffffffff82e15a08>] ? _raw_spin_unlock_irq+0x31/0x3b
[ 19.784115] [<ffffffff81714e92>] elv_set_request+0x1c/0x21
[ 19.785386] [<ffffffff817190a5>] get_request+0x2ef/0x698
[ 19.786637] [<ffffffff8110c656>] ? add_wait_queue_exclusive+0x44/0x44
[ 19.788052] [<ffffffff817194a9>] blk_get_request+0x5b/0x7d
[ 19.822922] [<ffffffff81bf2d9c>] ide_cd_queue_pc+0x76/0x19d
[ 19.824240] [<ffffffff811155d8>] ? __lock_acquire+0x65b/0xdee
[ 19.831508] [<ffffffff81bf30a3>] cdrom_check_status+0x51/0x53
[ 19.832828] [<ffffffff81bf3d19>] ide_cdrom_check_events_real+0x20/0x3f
[ 19.834178] [<ffffffff82492e98>] cdrom_update_events+0x18/0x21
[ 19.860211] [<ffffffff82492eb3>] cdrom_check_events+0x12/0x1f
[ 19.861462] [<ffffffff81bf1dcc>] idecd_check_events+0x1c/0x1e
[ 19.862700] [<ffffffff817284fc>] disk_check_events+0x46/0x103
[ 19.863833] [<ffffffff817285d5>] disk_events_workfn+0x1c/0x1e
[ 19.864966] [<ffffffff810ee28e>] process_one_work+0x24b/0x484
[ 19.866094] [<ffffffff810ee974>] worker_thread+0x1f5/0x2a7
[ 19.883151] [<ffffffff810ee77f>] ? rescuer_thread+0x289/0x289
[ 19.884397] [<ffffffff810ee77f>] ? rescuer_thread+0x289/0x289
[ 19.885533] [<ffffffff810f37e5>] kthread+0xc5/0xcd
[ 19.886525] [<ffffffff810f3720>] ? kthread_parkme+0x24/0x24
[ 19.887616] [<ffffffff82e1671f>] ret_from_fork+0x3f/0x70
[ 19.909721] [<ffffffff810f3720>] ? kthread_parkme+0x24/0x24
[ 19.910972] ---[ end trace 8da7b69074db19dd ]---
[ 19.911945] ------------[ cut here ]------------
Thanks,
Kernel Test Robot
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