another perf_fuzzer hard lockup

[Vince Weaver]

Triggered by the perf_fuzzer on a core2 machine, 3.14-rc6.

Hopefully the trace_do_page_fault in the stack trace is incidental and not
showing that something was missed with the recent page fault tracing
fixes.

Vince

[ 7321.924284] BUG: unable to handle kernel NULL pointer dereference at           (null)
[ 7321.928004] IP: [<ffffffff81534f7b>] _raw_spin_lock_irqsave+0x11/0x2d
[ 7321.928004] PGD 118d2b067 PUD 11952d067 PMD 0
[ 7321.928004] Oops: 0002 [#1] SMP
[ 7321.928004] Modules linked in: cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative f71882fg mcs7830 usbnet evdev ohci_pci psmouse serio_raw coretemp pcspkr ohci_hcd video wmi i2c_nforce2 acpi_cpufreq button processor thermal_sys sg ehci_pci ehci_hcd sd_mod usbcore usb_common
[ 7321.928004] CPU: 0 PID: 983 Comm: perf_fuzzer Not tainted 3.14.0-rc6 #36
[ 7321.928004] Hardware name: AOpen   DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BIOS 080015  10/19/2012
[ 7321.928004] task: ffff8801190b47e0 ti: ffff8800c7b28000 task.ti: ffff8800c7b28000
[ 7321.928004] RIP: 0010:[<ffffffff81534f7b>]  [<ffffffff81534f7b>] _raw_spin_lock_irqsave+0x11/0x2d                                                            
[ 7321.928004] RSP: 0018:ffff8800c7b29a08  EFLAGS: 00010046
[ 7321.928004] RAX: 0000000000000046 RBX: ffff88011a592c00 RCX: 0000000000000000
[ 7321.928004] RDX: 0000000000010000 RSI: ffff88011a592c00 RDI: 0000000000000000
[ 7321.928004] RBP: ffff8800c7b29a08 R08: ffff88011a592c00 R09: 0000000000000000
[ 7321.928004] R10: 0000000000000000 R11: ffff88011b280000 R12: ffff88011fc0b940
[ 7321.928004] R13: 0000000000000000 R14: ffff88011a592d58 R15: 0000000000000000
[ 7321.928004] FS:  0000000002195840(0063) GS:ffff88011fc00000(0000) knlGS:0000000000000000                                                                     
[ 7321.928004] CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
[ 7321.928004] CR2: 0000000000000000 CR3: 0000000118dad000 CR4: 00000000000407f0
[ 7321.928004] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 7321.928004] DR3: 0000000002197000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 7321.928004] Stack:
[ 7321.928004]  ffff8800c7b29a58 ffffffff810198cc 0000000000000000 0000000000000000                                                                             
[ 7321.928004]  ffff88011fff8d68 0000000000000000 ffff88011a592c00 ffff88011fc0b940                                                                             
[ 7321.928004]  0000000000000040 0000000000000000 ffff8800c7b29a88 ffffffff81019a8f                                                                             
[ 7321.928004] Call Trace:                                                      
[ 7321.928004]  [<ffffffff810198cc>] __intel_shared_reg_get_constraints+0x5e/0x19c                                                                              
[ 7321.928004]  [<ffffffff81019a8f>] intel_get_event_constraints+0x85/0x154     
[ 7321.928004]  [<ffffffff8101434d>] x86_schedule_events+0x54/0x185             
[ 7321.928004]  [<ffffffff81012de6>] x86_pmu_commit_txn+0x51/0x9a               
[ 7321.928004]  [<ffffffff810dbb46>] ? __alloc_pages_nodemask+0x174/0x737       
[ 7321.928004]  [<ffffffff810f3d50>] ? unmap_single_vma+0x605/0x669             
[ 7321.928004]  [<ffffffff810cd121>] ? event_sched_in+0x11d/0x12d               
[ 7321.928004]  [<ffffffff810cd1c9>] group_sched_in+0x98/0x147                  
[ 7321.928004]  [<ffffffff810cd3d6>] ctx_sched_in+0x15e/0x185                   
[ 7321.928004]  [<ffffffff810cd466>] perf_event_sched_in+0x69/0x72              
[ 7321.928004]  [<ffffffff810cd537>] __perf_install_in_context+0xc8/0xf1        
[ 7321.928004]  [<ffffffff810cdd6a>] ? perf_event_task_output+0x13d/0x13d       
[ 7321.928004]  [<ffffffff810cdda6>] remote_function+0x3c/0x43                  
[ 7321.928004]  [<ffffffff810954a3>] smp_call_function_single+0x8a/0x101        
[ 7321.928004]  [<ffffffff810cddf1>] task_function_call+0x44/0x4e               
[ 7321.928004]  [<ffffffff810cd46f>] ? perf_event_sched_in+0x72/0x72            
[ 7321.928004]  [<ffffffff810cdf26>] perf_install_in_context+0x81/0xbc          
[ 7321.928004]  [<ffffffff8153330b>] ? mutex_lock+0x16/0x37                     
[ 7321.928004]  [<ffffffff810d21f5>] SYSC_perf_event_open+0x647/0x7f5           
[ 7321.928004]  [<ffffffff810d23ac>] SyS_perf_event_open+0x9/0xb                
[ 7321.928004]  [<ffffffff8153bf26>] system_call_fastpath+0x1a/0x1f             
[ 7321.928004] Code: c1 07 89 c2 c1 ea 10 66 39 c2 74 0c 66 8b 07 66 39 d0 74 04 f3 90 eb f4 c9 c3 55 48 89 e5 66 66 66 66 90 9c 58 fa ba 00 00 01 00 <f0> 0f c1 17 89 d1 c1 e9 10 66 39 d1 74 0c 66 8b 17 66 39 ca 74                          
[ 7321.928004] RIP  [<ffffffff81534f7b>] _raw_spin_lock_irqsave+0x11/0x2d       
[ 7321.928004]  RSP <ffff8800c7b29a08>                                          
[ 7321.928004] CR2: 0000000000000000                                            
[ 7321.928004] ---[ end trace d36f8f2ae570dc66 ]---                             
[ 7381.931999] INFO: rcu_sched detected stalls on CPUs/tasks: { 0} (detected by 1, t=15002 jiffies, g=55073, c=55072, q=25)                                     
[ 7381.932000] sending NMI to all CPUs:                                         
[ 7381.932000] NMI backtrace for cpu 1                                          
[ 7381.932000] CPU: 1 PID: 1702 Comm: perf_fuzzer Tainted: G      D      3.14.0-rc6 #36                                                                         
[ 7381.932000] Hardware name: AOpen   DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BIOS 080015  10/19/2012                                                            
[ 7381.932000] task: ffff880119785010 ti: ffff880119306000 task.ti: ffff880119306000                                                                            
[ 7381.932000] RIP: 0010:[<ffffffff812a7277>]  [<ffffffff812a7277>] __const_udelay+0x1b/0x27                                                                    
[ 7381.932000] RSP: 0000:ffff88011fc83d98  EFLAGS: 00000803                     
[ 7381.932000] RAX: 0000000039558400 RBX: 0000000000000001 RCX: 0000000000000003
[ 7381.932000] RDX: 00000000002658dc RSI: 0000000000000200 RDI: 0000000000418958
[ 7381.932000] RBP: ffff88011fc83d98 R08: 0000000000000000 R09: 0000000000000008
[ 7381.932000] R10: 0000000000000000 R11: 0000000000000005 R12: ffff88011fc8d510
[ 7381.932000] R13: 0000000000000001 R14: ffffffff81a37300 R15: 0000000000000001
[ 7381.932000] FS:  0000000002195840(0063) GS:ffff88011fc80000(0000) knlGS:0000000000000000                                                                     
[ 7381.932000] CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b                
[ 7381.932000] CR2: 000000000040b040 CR3: 00000001196d2000 CR4: 00000000000407e0
[ 7381.932000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000002197000
[ 7381.932000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 7381.932000] Stack:                                                           
[ 7381.932000]  ffff88011fc83db8 ffffffff8102c1ed 000000000000d720 ffffffff81a37300                                                                             
[ 7381.932000]  ffff88011fc83e18 ffffffff81087ee3 0000000000000000 0000000000000019                                                                             
[ 7381.932000]  ffffffff81a9eb60 0000000000000083 ffff88011fc83e08 ffff880119785010                                                                             
[ 7381.932000] Call Trace:                                                      
[ 7381.932000]  <IRQ>                                                           
[ 7381.932000]  [<ffffffff8102c1ed>] arch_trigger_all_cpu_backtrace+0x79/0x8d   
[ 7381.932000]  [<ffffffff81087ee3>] rcu_check_callbacks+0x462/0x5dd            
[ 7381.932000]  [<ffffffff8104a14c>] update_process_times+0x41/0x6a             
[ 7381.932000]  [<ffffffff81090ebd>] tick_sched_handle+0x4a/0x59                
[ 7381.932000]  [<ffffffff8109108e>] tick_sched_timer+0x5d/0x7c                 
[ 7381.932000]  [<ffffffff8105e5e4>] __run_hrtimer+0xba/0x145                   
[ 7381.932000]  [<ffffffff81091031>] ? tick_nohz_handler+0xb0/0xb0              
[ 7381.932000]  [<ffffffff8105e8b9>] hrtimer_interrupt+0xd5/0x1c3               
[ 7381.932000]  [<ffffffff8102b2a3>] local_apic_timer_interrupt+0x58/0x5d       
[ 7381.932000]  [<ffffffff8102bc5f>] smp_trace_apic_timer_interrupt+0x53/0x91   
[ 7381.932000]  [<ffffffff8153cc3a>] trace_apic_timer_interrupt+0x6a/0x70       
[ 7381.932000]  <EOI>                                                           
[ 7381.932000] Code: 48 89 e5 66 66 66 66 90 ff 15 ee 8f 7b 00 c9 c3 55 48 8d 04 bd 00 00 00 00 65 48 8b 14 25 e0 22 01 00 48 89 e5 48 6b d2 3e f7 e2 <48> 8d 7a 01 ff 15 c7 8f 7b 00 c9 c3 55 48 89 e5 66 66 66 66 90                          
[ 7322.969219] NMI backtrace for cpu 0                                          
[ 7381.932000] INFO: NMI handler (arch_trigger_all_cpu_backtrace_handler) took too long to run: 692.154 msecs                                                   
[ 7322.969219] CPU: 0 PID: 983 Comm: perf_fuzzer Tainted: G      D      3.14.0-rc6 #36                                                                          
[ 7322.969219] Hardware name: AOpen   DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BIOS 080015  10/19/2012                                                            
[ 7322.969219] task: ffff8801190b47e0 ti: ffff8800c7b28000 task.ti: ffff8800c7b28000                                                                            
[ 7322.969219] RIP: 0010:[<ffffffff81534ff3>]  [<ffffffff81534ff3>] _raw_spin_lock+0x26/0x2a                                                                    
[ 7322.969219] RSP: 0018:ffff88011fc03e48  EFLAGS: 00000097                     
[ 7322.969219] RAX: 000000006f8f6f8e RBX: ffff88011a2a92c0 RCX: ffff88011fc03e98
[ 7322.969219] RDX: 0000000000006f8f RSI: ffff88011a2a92c0 RDI: ffff88011fc15b2c
[ 7322.969219] RBP: ffff88011fc03e48 R08: ffff88011fc0d010 R09: 0000000000000104
[ 7322.969219] R10: ffff88011fc12ae0 R11: ffff88011fc0d010 R12: ffff88011a2a92c0
[ 7322.969219] R13: ffff88011fc15c08 R14: 0000000000000000 R15: ffff88011fc0d0c8
[ 7322.969219] FS:  0000000002195840(0063) GS:ffff88011fc00000(0000) knlGS:0000000000000000                                                                     
[ 7322.969219] CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b                
[ 7322.969219] CR2: 0000000000000000 CR3: 0000000118dad000 CR4: 00000000000407f0
[ 7322.969219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 7322.969219] DR3: 0000000002197000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 7322.969219] Stack:                                                           
[ 7322.969219]  ffff88011fc03e68 ffffffff810cb8df ffff88011fc03e98 ffff88011fc15b20                                                                             
[ 7322.969219]  ffff88011fc03e98 ffffffff810cd5da ffff88011fc15c08 ffff88011fc0d010                                                                             
[ 7322.969219]  ffff88011fc0d050 ffff88011fc03f28 ffff88011fc03ee8 ffffffff8105e5e4                                                                             
[ 7322.969219] Call Trace:                                                      
[ 7322.969219]  <IRQ>                                                           
[ 7322.969219]  [<ffffffff810cb8df>] perf_ctx_lock+0x15/0x27                    
[ 7322.969219]  [<ffffffff810cd5da>] perf_cpu_hrtimer_handler+0x7a/0x1b0        
[ 7322.969219]  [<ffffffff8105e5e4>] __run_hrtimer+0xba/0x145                   
[ 7322.969219]  [<ffffffff810cd560>] ? __perf_install_in_context+0xf1/0xf1      
[ 7322.969219]  [<ffffffff8105e8b9>] hrtimer_interrupt+0xd5/0x1c3               
[ 7322.969219]  [<ffffffff8102b2a3>] local_apic_timer_interrupt+0x58/0x5d       
[ 7322.969219]  [<ffffffff8102bc5f>] smp_trace_apic_timer_interrupt+0x53/0x91   
[ 7322.969219]  [<ffffffff8153cc3a>] trace_apic_timer_interrupt+0x6a/0x70       
[ 7322.969219]  <EOI>                                                           
[ 7322.969219]  [<ffffffff8105f36d>] ? blocking_notifier_call_chain+0x14/0x16   
[ 7322.969219]  [<ffffffff8109be4f>] ? acct_collect+0x175/0x17d                 
[ 7322.969219]  [<ffffffff81041a14>] do_exit+0x22f/0x947                        
[ 7322.969219]  [<ffffffff81535fd2>] oops_end+0xb5/0xbd                         
[ 7322.969219]  [<ffffffff81034a30>] no_context+0x26d/0x27c                     
[ 7322.969219]  [<ffffffff81034bfc>] __bad_area_nosemaphore+0x1bd/0x1dd         
[ 7322.969219]  [<ffffffff81034c78>] bad_area+0x47/0x4e                         
[ 7322.969219]  [<ffffffff8153831d>] __do_page_fault+0x25b/0x3ed                
[ 7322.969219]  [<ffffffff810cd3d6>] ? ctx_sched_in+0x15e/0x185                 
[ 7322.969219]  [<ffffffff810cd466>] ? perf_event_sched_in+0x69/0x72            
[ 7322.969219]  [<ffffffff81538539>] trace_do_page_fault+0x8a/0x93              
[ 7322.969219]  [<ffffffff81535572>] trace_page_fault+0x22/0x30                 
[ 7322.969219]  [<ffffffff81534f7b>] ? _raw_spin_lock_irqsave+0x11/0x2d         
[ 7322.969219]  [<ffffffff810198cc>] __intel_shared_reg_get_constraints+0x5e/0x19c                                                                              
[ 7322.969219]  [<ffffffff81019a8f>] intel_get_event_constraints+0x85/0x154     
[ 7322.969219]  [<ffffffff8101434d>] x86_schedule_events+0x54/0x185             
[ 7322.969219]  [<ffffffff81012de6>] x86_pmu_commit_txn+0x51/0x9a               
[ 7322.969219]  [<ffffffff810dbb46>] ? __alloc_pages_nodemask+0x174/0x737       
[ 7322.969219]  [<ffffffff810f3d50>] ? unmap_single_vma+0x605/0x669             
[ 7322.969219]  [<ffffffff810cd121>] ? event_sched_in+0x11d/0x12d               
[ 7322.969219]  [<ffffffff810cd1c9>] group_sched_in+0x98/0x147                  
[ 7322.969219]  [<ffffffff810cd3d6>] ctx_sched_in+0x15e/0x185                   
[ 7322.969219]  [<ffffffff810cd466>] perf_event_sched_in+0x69/0x72              
[ 7322.969219]  [<ffffffff810cd537>] __perf_install_in_context+0xc8/0xf1        
[ 7322.969219]  [<ffffffff810cdd6a>] ? perf_event_task_output+0x13d/0x13d       
[ 7322.969219]  [<ffffffff810cdda6>] remote_function+0x3c/0x43                  
[ 7322.969219]  [<ffffffff810954a3>] smp_call_function_single+0x8a/0x101        
[ 7322.969219]  [<ffffffff810cddf1>] task_function_call+0x44/0x4e               
[ 7322.969219]  [<ffffffff810cd46f>] ? perf_event_sched_in+0x72/0x72            
[ 7322.969219]  [<ffffffff810cdf26>] perf_install_in_context+0x81/0xbc          
[ 7322.969219]  [<ffffffff8153330b>] ? mutex_lock+0x16/0x37                     
[ 7322.969219]  [<ffffffff810d21f5>] SYSC_perf_event_open+0x647/0x7f5           
[ 7322.969219]  [<ffffffff810d23ac>] SyS_perf_event_open+0x9/0xb                
[ 7322.969219]  [<ffffffff8153bf26>] system_call_fastpath+0x1a/0x1f             
[ 7322.969219] Code: 90 eb f4 c9 c3 55 48 89 e5 66 66 66 66 90 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 74 0c 66 8b 07 66 39 d0 74 04 f3 90 <eb> f4 c9 c3 55 48 89 e5 41 56 41 55 41 54 53 66 66 66 66 90 48                          
[ 7322.969219] INFO: NMI handler (arch_trigger_all_cpu_backtrace_handler) took too long to run: 1971.954 msecs                                                  


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