Kernel panic when using ubacktrace/print_ubacktrace in timer.profile with systemtap 2.3.x in kernel 3.9.4.

gistfile1.txt

[112186.086052] INFO: rcu_sched self-detected stall on CPU { 10}  (t=6000 jiffies g=1519966 c=1519965 q=3)
[112186.096687] Pid: 47, comm: migration/10 Tainted: G           O 3.9.4 #1
[112186.105319] Call Trace:
[112186.106073] INFO: rcu_sched detected stalls on CPUs/tasks: { 10 11} (detected by 9, t=6002 jiffies, g=1519966, c=1519965, q=3)
[112186.106074] Task dump for CPU 10:
[112186.106077] migration/10    R  running task        0    47      2 0x00000000
[112186.106080]  0000000000000000 ffffffff814f5c4a 0000000000013c40 ffff880c240bbfd8
[112186.106082]  000000002767820c ffff880c2403b080 ffffffff81a39ba0 ffff880c240b1c50
[112186.106084]  ffff880c240b1c50 ffff880c240b1c50 0000000000000000 ffffffff8105a96f
[112186.106085] Call Trace:
[112186.106095]  [<ffffffff814f5c4a>] ? __schedule+0x41f/0x4e6
[112186.106100]  [<ffffffff8105a96f>] ? smpboot_thread_fn+0x13b/0x157
[112186.106102]  [<ffffffff8105a834>] ? lg_global_lock+0x65/0x65
[112186.106105]  [<ffffffff81055436>] ? kthread+0x7d/0x85
[112186.106107]  [<ffffffff810553b9>] ? __kthread_parkme+0x59/0x59
[112186.106112]  [<ffffffff814fc73c>] ? ret_from_fork+0x7c/0xb0
[112186.106114]  [<ffffffff810553b9>] ? __kthread_parkme+0x59/0x59
[112186.106115] Task dump for CPU 11:
[112186.106117] load-logs       R  running task        0 29704  29446 0x10000008
[112186.106120]  ffffffff8107956e ffffffff814f5c4a 0000000000013c40 ffff880c174efd90
[112186.106122]  0000000000b54fe0 ffff880c174efd50 ffffffff81078bbb ffff880c174efd90
[112186.106124]  ffff880c174efd90 ffffffff8107986a fffffffffffffff5 0000000081079e36
[112186.106124] Call Trace:
[112186.106130]  [<ffffffff8107956e>] ? get_futex_key+0x7a/0x1c8
[112186.106132]  [<ffffffff814f5c4a>] ? __schedule+0x41f/0x4e6
[112186.106134]  [<ffffffff81078bbb>] ? get_futex_value_locked+0x24/0x31
[112186.106137]  [<ffffffff8107986a>] ? futex_wait_setup+0xbf/0xd1
[112186.106139]  [<ffffffff8107a2bb>] ? futex_wait+0xe2/0x211
[112186.106141]  [<ffffffff8107956e>] ? get_futex_key+0x7a/0x1c8
[112186.106143]  [<ffffffff81079791>] ? futex_wake+0xd5/0xef
[112186.106146]  [<ffffffff8107ab80>] ? do_futex+0xc5/0x77f
[112186.106149]  [<ffffffff8107c87d>] ? arch_local_irq_save+0x11/0x17
[112186.106152]  [<ffffffff814f6706>] ? _raw_read_lock_irqsave+0x1c/0x25
[112186.106154]  [<ffffffff814f6731>] ? _raw_read_unlock_irqrestore+0xc/0xd
[112186.106167]  [<ffffffffa0c91147>] ? __stp_tf_get_map_entry+0x9b/0xa0 [stap_144a2a5f843564742581d523725a704f_2987]
[112186.106178]  [<ffffffffa0c9d4dc>] ? __stp_utrace_task_finder_target_syscall_exit+0x3d/0x1e1 [stap_144a2a5f843564742581d523725a704f_2987]
[112186.106187]  [<ffffffffa0c93e99>] ? utrace_report_syscall_exit+0xcb/0xda [stap_144a2a5f843564742581d523725a704f_2987]
[112186.106190]  [<ffffffff810175a4>] ? syscall_trace_leave+0xbb/0xe7
[112186.106193]  [<ffffffff814fca87>] ? int_check_syscall_exit_work+0x34/0x3d
[112186.371501]  <IRQ>  [<ffffffff8109e355>] ? rcu_check_callbacks+0x1b5/0x53b
[112186.387395]  [<ffffffff81077cc5>] ? tick_sched_do_timer+0x25/0x25
[112186.394347]  [<ffffffff81047e6a>] ? update_process_times+0x31/0x5c
[112186.401396]  [<ffffffff81077be2>] ? tick_sched_handle+0x31/0x3b
[112186.408153]  [<ffffffff81077cf5>] ? tick_sched_timer+0x30/0x4c
[112186.414813]  [<ffffffff81057934>] ? __run_hrtimer+0x87/0x132
[112186.421277]  [<ffffffff810580ad>] ? hrtimer_interrupt+0xcf/0x1a9
[112186.428124]  [<ffffffff8108df44>] ? cpu_stopper_thread+0x119/0x119
[112186.435174]  [<ffffffff81027f1f>] ? smp_apic_timer_interrupt+0x6d/0x7e
[112186.442613]  [<ffffffff814fd3dd>] ? apic_timer_interrupt+0x6d/0x80
[112186.449658]  <EOI>  [<ffffffff81066888>] ? load_balance+0x401/0x624
[112186.456829]  [<ffffffff8108df95>] ? stop_machine_cpu_stop+0x51/0xaf
[112186.463975]  [<ffffffff8108deb6>] ? cpu_stopper_thread+0x8b/0x119
[112186.470928]  [<ffffffff8100d02f>] ? load_TLS+0x7/0xa
[112186.476613]  [<ffffffff8100d5a7>] ? __switch_to+0x136/0x3c0
[112186.482981]  [<ffffffff8105ecbd>] ? finish_task_switch+0x40/0xb3
[112186.489836]  [<ffffffff814f5c4a>] ? __schedule+0x41f/0x4e6
[112186.496106]  [<ffffffff8105a96f>] ? smpboot_thread_fn+0x13b/0x157
[112186.503050]  [<ffffffff8105a834>] ? lg_global_lock+0x65/0x65
[112186.509514]  [<ffffffff81055436>] ? kthread+0x7d/0x85
[112186.515299]  [<ffffffff810553b9>] ? __kthread_parkme+0x59/0x59
[112186.521949]  [<ffffffff814fc73c>] ? ret_from_fork+0x7c/0xb0
[112186.528316]  [<ffffffff810553b9>] ? __kthread_parkme+0x59/0x59