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Message-ID: <CA+G9fYsdTLRj55_bvod8Sf+0zvK0RRMp5+FeJcOx5oAcAKOGXA@mail.gmail.com>
Date: Fri, 25 Sep 2020 12:40:43 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: linux- stable <stable@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
rcu@...r.kernel.org
Cc: "Paul E. McKenney" <paulmck@...nel.org>,
Joel Fernandes <joel@...lfernandes.org>,
Steven Rostedt <rostedt@...dmis.org>,
Peter Zijlstra <peterz@...radead.org>,
Namhyung Kim <namhyung@...nel.org>,
Sasha Levin <sashal@...nel.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
LTP List <ltp@...ts.linux.it>, lkft-triage@...ts.linaro.org
Subject: [stable 5.8] rcu: INFO: rcu_sched self-detected stall on CPU - RIP: 0010:trace_graph_return
While running LTP trace test case on qemu_x86_64, qemu_i386 and i386
the following kernel rcu: INFO reported.
Easily reproducible on qemu_x86_64, qemu_i386 and i386 devices.
steps to reproduce:
# Boot qemu_x86_64 or qemu i386 or i386 with trace configs enabled.
# cd /opt/ltp
# ./runltp -f tracing
metadata:
git branch: linux-5.8.y
git repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
git commit: f2ae9d9cdf48e015834ce21030249793bf0c44f5
git describe: v5.8.9-296-gf2ae9d9cdf48
make_kernelversion: 5.8.11-rc1
kernel-config:
https://builds.tuxbuild.com/SQySbShzDnHK3CzpR1T7GA/kernel.config
[ 99.868127] rcu: INFO: rcu_sched self-detected stall on CPU
[ 99.868127] rcu: 3-....: (1 GPs behind)
idle=d66/1/0x4000000000000000 softirq=2573/2600 fqs=3631
[ 99.868127] (t=21003 jiffies g=2909 q=4480)
[ 99.868127] NMI backtrace for cpu 3
[ 99.868127] CPU: 3 PID: 781 Comm: sh Not tainted 5.8.11-rc1 #1
[ 99.868127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 99.874535] Call Trace:
[ 99.874535] <IRQ>
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] dump_stack+0x81/0xba
[ 99.874535] nmi_cpu_backtrace.cold+0x14/0x54
[ 99.874535] ? lapic_can_unplug_cpu.cold+0x3b/0x3b
[ 99.874535] nmi_trigger_cpumask_backtrace+0x85/0x92
[ 99.874535] arch_trigger_cpumask_backtrace+0x19/0x20
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] rcu_dump_cpu_stacks+0xa0/0xd2
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] rcu_sched_clock_irq.cold+0x23a/0x41c
[ 99.874535] ? rcu_sched_clock_irq+0x5/0x490
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] update_process_times+0x28/0x60
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] tick_sched_handle.isra.0+0x34/0x50
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] tick_sched_timer+0x40/0x80
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] __hrtimer_run_queues+0x96/0x2b0
[ 99.874535] ? tick_sched_handle.isra.0+0x50/0x50
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] hrtimer_interrupt+0x109/0x220
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] __sysvec_apic_timer_interrupt+0x64/0x100
[ 99.874535] ? ftrace_graph_caller+0xc0/0xc0
[ 99.874535] asm_call_on_stack+0x12/0x20
[ 99.874535] </IRQ>
[ 99.874535] sysvec_apic_timer_interrupt+0x7e/0x90
[ 99.874535] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 99.874535] RIP: 0010:__text_poke+0x367/0x3f0
[ 99.874535] Code: 14 25 80 6d 01 00 e8 b8 80 03 00 65 48 8b 05 d0
f0 76 63 a8 aa 75 58 ba 00 10 00 00 e9 d9 fe ff ff e8 3d 8f 1f 00 ff
75 c0 9d <e9> 1a ff ff ff 4c 89 e7 e8 8c 0a 29 00 48 89 c1 49 81 ff 00
10 00
[ 99.874535] RSP: 0018:ffffa932c0947c40 EFLAGS: 00000286
[ 99.874535] RAX: ffffa932c0947ca8 RBX: ffff8ce37b16deb8 RCX: 0000000000000000
[ 99.874535] RDX: 0000000000000001 RSI: ffffffff9c8d2550 RDI: ffffffff9c8a7c03
[ 99.874535] RBP: ffffa932c0947ca8 R08: ffff8ce3619cc280 R09: ffff8ce3619d7000
[ 99.874535] R10: 0000000000000668 R11: ffff8ce3619d7678 R12: ffffffff9d0a8620
[ 99.874535] R13: 0000000000000001 R14: ffffffff9e5b7de9 R15: 0000000000000621
[ 99.874535] ? dpm_suspend+0x240/0x240
[ 99.912445] ? ftrace_graph_caller+0xc0/0xc0
[ 99.912445] ? __text_poke+0x363/0x3f0
[ 99.912445] ? ftrace_graph_caller+0xc0/0xc0
[ 99.912445] text_poke_bp_batch+0x123/0x190
[ 99.912445] ? node_access_release+0x10/0x10
[ 99.912445] ? ftrace_graph_caller+0xc0/0xc0
[ 99.912445] text_poke_queue+0xa7/0xd0
[ 99.912445] ? ftrace_graph_caller+0xc0/0xc0
[ 99.912445] ftrace_replace_code+0x11f/0x170
[ 99.912445] ftrace_modify_all_code+0xc8/0x160
[ 99.912445] arch_ftrace_update_code+0x9/0x10
[ 99.912445] ftrace_run_update_code+0x1a/0x70
[ 99.912445] ftrace_startup_enable+0x2e/0x50
[ 99.912445] ftrace_startup+0xa4/0x100
[ 99.912445] register_ftrace_function+0x25/0x70
[ 99.912445] stack_trace_sysctl+0x77/0x9c
[ 99.912445] proc_sys_call_handler+0x164/0x190
[ 99.912445] proc_sys_write+0x14/0x20
[ 99.912445] vfs_write+0xc9/0x200
[ 99.912445] ksys_write+0x67/0xe0
[ 99.912445] __x64_sys_write+0x1a/0x20
[ 99.912445] do_syscall_64+0x51/0x90
[ 99.912445] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 99.912445] RIP: 0033:0x7f1163016144
[ 99.912445] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00
00 00 00 00 66 90 48 8d 05 c1 e7 2c 00 8b 00 85 c0 75 13 b8 01 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89
f5 53
[ 99.912445] RSP: 002b:00007ffe884a34d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 99.912445] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1163016144
[ 99.912445] RDX: 0000000000000002 RSI: 0000000001852ea0 RDI: 0000000000000001
[ 99.912445] RBP: 0000000001852ea0 R08: 000000000000000a R09: 00007f11630633e0
[ 99.912445] R10: 000000000000000a R11: 0000000000000246 R12: 00007f11632e0760
[ 99.912445] R13: 0000000000000002 R14: 00007f11632db760 R15: 0000000000000002
[ 173.329178] rcu: INFO: rcu_sched self-detected stall on CPU
[ 173.329178] rcu: 2-....: (20973 ticks this GP)
idle=a4a/1/0x4000000000000000 softirq=3412/3412 fqs=4832
[ 173.329178] (t=21000 jiffies g=3197 q=7683)
[ 173.329178] NMI backtrace for cpu 2
[ 173.329178] CPU: 2 PID: 781 Comm: sh Not tainted 5.8.11-rc1 #1
[ 173.329178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 173.329178] Call Trace:
[ 173.329178] <IRQ>
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] dump_stack+0x81/0xba
[ 173.329178] nmi_cpu_backtrace.cold+0x14/0x54
[ 173.329178] ? lapic_can_unplug_cpu.cold+0x3b/0x3b
[ 173.329178] nmi_trigger_cpumask_backtrace+0x85/0x92
[ 173.329178] arch_trigger_cpumask_backtrace+0x19/0x20
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] rcu_dump_cpu_stacks+0xa0/0xd2
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] rcu_sched_clock_irq.cold+0x23a/0x41c
[ 173.329178] ? rcu_sched_clock_irq+0x5/0x490
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] update_process_times+0x28/0x60
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] tick_sched_handle.isra.0+0x34/0x50
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] tick_sched_timer+0x40/0x80
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] __hrtimer_run_queues+0x96/0x2b0
[ 173.329178] ? tick_sched_handle.isra.0+0x50/0x50
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] hrtimer_interrupt+0x109/0x220
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] __sysvec_apic_timer_interrupt+0x64/0x100
[ 173.329178] ? ftrace_graph_caller+0xc0/0xc0
[ 173.329178] asm_call_on_stack+0x12/0x20
[ 173.329178] </IRQ>
[ 173.329178] sysvec_apic_timer_interrupt+0x7e/0x90
[ 173.329178] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 173.329178] RIP: 0010:__text_poke+0x367/0x3f0
[ 173.329178] Code: 14 25 80 6d 01 00 e8 b8 80 03 00 65 48 8b 05 d0
f0 76 63 a8 aa 75 58 ba 00 10 00 00 e9 d9 fe ff ff e8 3d 8f 1f 00 ff
75 c0 9d <e9> 1a ff ff ff 4c 89 e7 e8 8c 0a 29 00 48 89 c1 49 81 ff 00
10 00
[ 173.372903] RSP: 0018:ffffa932c0947c40 EFLAGS: 00000282
[ 173.374214] RAX: ffffa932c0947ca8 RBX: ffff8ce37b16deb8 RCX: 0000000000000000
[ 173.374214] RDX: 0000000000000001 RSI: ffffffff9c8d2550 RDI: ffffffff9c8a7c03
[ 173.374214] RBP: ffffa932c0947ca8 R08: ffff8ce3618c8a00 R09: ffff8ce3618f1000
[ 173.374214] R10: 0000000000000f40 R11: ffff8ce3618f1f50 R12: ffffffff9caf68e1
[ 173.374214] R13: 0000000000000004 R14: ffffffff9e5b798a R15: 00000000000008e5
[ 173.374214] ? mark_page_lazyfree+0x1/0x130
[ 173.374214] ? ftrace_graph_caller+0xc0/0xc0
[ 173.374214] ? __text_poke+0x363/0x3f0
[ 173.374214] ? ftrace_graph_caller+0xc0/0xc0
[ 173.374214] text_poke_bp_batch+0xd4/0x190
[ 173.374214] ? frag_start+0x40/0x40
[ 173.374214] ? ftrace_graph_caller+0xc0/0xc0
[ 173.374214] text_poke_queue+0xa7/0xd0
[ 173.374214] ? ftrace_graph_caller+0xc0/0xc0
[ 173.374214] ftrace_replace_code+0x11f/0x170
[ 173.397011] ftrace_modify_all_code+0xc8/0x160
[ 173.397011] arch_ftrace_update_code+0x9/0x10
[ 173.397011] ftrace_run_update_code+0x1a/0x70
[ 173.397011] ftrace_startup_enable+0x2e/0x50
[ 173.397011] ftrace_startup+0xa4/0x100
[ 173.397011] register_ftrace_function+0x25/0x70
[ 173.397011] stack_trace_sysctl+0x77/0x9c
[ 173.397011] proc_sys_call_handler+0x164/0x190
[ 173.397011] proc_sys_write+0x14/0x20
[ 173.397011] vfs_write+0xc9/0x200
[ 173.397011] ksys_write+0x67/0xe0
[ 173.397011] __x64_sys_write+0x1a/0x20
[ 173.397011] do_syscall_64+0x51/0x90
[ 173.397011] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 173.397011] RIP: 0033:0x7f1163016144
[ 173.397011] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00
00 00 00 00 66 90 48 8d 05 c1 e7 2c 00 8b 00 85 c0 75 13 b8 01 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89
f5 53
[ 173.397011] RSP: 002b:00007ffe884a34d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 173.397011] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1163016144
[ 173.397011] RDX: 0000000000000002 RSI: 0000000001852ea0 RDI: 0000000000000001
[ 173.397011] RBP: 0000000001852ea0 R08: 000000000000000a R09: 00007f11630633e0
[ 173.397011] R10: 000000000000000a R11: 0000000000000246 R12: 00007f11632e0760
[ 173.397011] R13: 0000000000000002 R14: 00007f11632db760 R15: 0000000000000002
[ 236.332272] rcu: INFO: rcu_sched self-detected stall on CPU
[ 236.332288] rcu: 2-....: (83813 ticks this GP)
idle=a4a/1/0x4000000000000000 softirq=3412/3412 fqs=18275
[ 236.332288] (t=84003 jiffies g=3197 q=21302)
[ 236.332288] NMI backtrace for cpu 2
[ 236.332288] CPU: 2 PID: 781 Comm: sh Not tainted 5.8.11-rc1 #1
[ 236.332288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 236.332288] Call Trace:
[ 236.332288] <IRQ>
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] dump_stack+0x81/0xba
[ 236.332288] nmi_cpu_backtrace.cold+0x14/0x54
[ 236.332288] ? lapic_can_unplug_cpu.cold+0x3b/0x3b
[ 236.332288] nmi_trigger_cpumask_backtrace+0x85/0x92
[ 236.332288] arch_trigger_cpumask_backtrace+0x19/0x20
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] rcu_dump_cpu_stacks+0xa0/0xd2
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] rcu_sched_clock_irq.cold+0x23a/0x41c
[ 236.332288] ? rcu_sched_clock_irq+0x5/0x490
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] update_process_times+0x28/0x60
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] tick_sched_handle.isra.0+0x34/0x50
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] tick_sched_timer+0x40/0x80
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] __hrtimer_run_queues+0x96/0x2b0
[ 236.332288] ? tick_sched_handle.isra.0+0x50/0x50
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] hrtimer_interrupt+0x109/0x220
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] __sysvec_apic_timer_interrupt+0x64/0x100
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] asm_call_on_stack+0x12/0x20
[ 236.332288] </IRQ>
[ 236.332288] sysvec_apic_timer_interrupt+0x7e/0x90
[ 236.332288] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 236.332288] RIP: 0010:trace_graph_entry+0x1ce/0x200
[ 236.332288] Code: 8b 15 a6 33 57 63 81 e2 00 00 0f 00 74 24 48 81
88 c8 09 00 00 00 02 00 00 e9 c4 fe ff ff e9 bf fe ff ff e8 84 d1 ff
ff 53 9d <8b> 45 dc e9 4d fe ff ff 48 81 a0 c8 09 00 00 ff fd ff ff e9
a0 fe
[ 236.332288] RSP: 0018:ffffa932c0947a88 EFLAGS: 00000246
[ 236.332288] RAX: ffffa932c0947ab0 RBX: 0000000000000246 RCX: 0000000000000000
[ 236.332288] RDX: 0000000000000001 RSI: ffffffff9caa7fad RDI: ffffffff9caa39bc
[ 236.332288] RBP: ffffa932c0947ab0 R08: ffff8ce361887800 R09: ffff8ce3618a8000
[ 236.332288] R10: 0000000000000cf0 R11: ffff8ce3618a8d00 R12: ffffffff9e274520
[ 236.332288] R13: ffffa932c0947adc R14: ffff8ce37bd2ca20 R15: ffffffff9e5c7e80
[ 236.332288] ? ftrace_graph_entry_test+0x2d/0x40
[ 236.332288] ? trace_graph_entry+0x1cc/0x200
[ 236.332288] ? insn_get_sib.part.0+0x60/0x60
[ 236.332288] ftrace_graph_entry_test+0x2d/0x40
[ 236.332288] ? insn_get_immediate.part.0+0x1ae/0x330
[ 236.332288] function_graph_enter+0xe8/0x140
[ 236.332288] ? insn_get_sib.part.0+0x60/0x60
[ 236.332288] ? insn_get_immediate.part.0+0x1ae/0x330
[ 236.332288] prepare_ftrace_return+0x5c/0x80
[ 236.332288] ? mipi_dsi_dcs_write+0xa0/0xa0
[ 236.332288] ftrace_graph_caller+0x81/0xc0
[ 236.332288] ? mipi_dsi_dcs_write+0xa0/0xa0
[ 236.332288] ? ftrace_graph_caller+0x81/0xc0
[ 236.332288] ? mipi_dsi_dcs_write+0xa0/0xa0
[ 236.332288] ? ftrace_graph_caller+0x81/0xc0
[ 236.332288] ? ftrace_return_to_handler+0x8d/0xf0
[ 236.332288] ? insn_get_displacement.part.0+0x5/0xd0
[ 236.332288] ? insn_get_immediate.part.0+0x5/0x330
[ 236.332288] insn_get_displacement.part.0+0x5/0xd0
[ 236.332288] insn_get_immediate.part.0+0x1ae/0x330
[ 236.332288] ? insn_get_displacement.part.0+0x5/0xd0
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] ? insn_get_immediate.part.0+0x1ae/0x330
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] insn_get_length+0x2c/0x40
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] text_poke_loc_init+0x6f/0x160
[ 236.332288] ? mipi_dsi_dcs_write+0xa0/0xa0
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] text_poke_queue+0x84/0xd0
[ 236.332288] ? ftrace_graph_caller+0xc0/0xc0
[ 236.332288] ftrace_replace_code+0x11f/0x170
[ 236.332288] ftrace_modify_all_code+0xc8/0x160
[ 236.332288] arch_ftrace_update_code+0x9/0x10
[ 236.332288] ftrace_run_update_code+0x1a/0x70
[ 236.332288] ftrace_startup_enable+0x2e/0x50
[ 236.332288] ftrace_startup+0xa4/0x100
[ 236.332288] register_ftrace_function+0x25/0x70
[ 236.332288] stack_trace_sysctl+0x77/0x9c
[ 236.332288] proc_sys_call_handler+0x164/0x190
[ 236.332288] proc_sys_write+0x14/0x20
[ 236.332288] vfs_write+0xc9/0x200
[ 236.332288] ksys_write+0x67/0xe0
[ 236.332288] __x64_sys_write+0x1a/0x20
[ 236.332288] do_syscall_64+0x51/0x90
[ 236.332288] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 236.332288] RIP: 0033:0x7f1163016144
[ 236.332288] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00
00 00 00 00 66 90 48 8d 05 c1 e7 2c 00 8b 00 85 c0 75 13 b8 01 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89
f5 53
[ 236.332288] RSP: 002b:00007ffe884a34d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 236.332288] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1163016144
[ 236.332288] RDX: 0000000000000002 RSI: 0000000001852ea0 RDI: 0000000000000001
[ 236.332288] RBP: 0000000001852ea0 R08: 000000000000000a R09: 00007f11630633e0
[ 236.332288] R10: 000000000000000a R11: 0000000000000246 R12: 00007f11632e0760
[ 236.332288] R13: 0000000000000002 R14: 00007f11632db760 R15: 0000000000000002
[ 299.335247] rcu: INFO: rcu_sched self-detected stall on CPU
[ 299.335269] rcu: 2-....: (146579 ticks this GP)
idle=a4a/1/0x4000000000000000 softirq=3412/3412 fqs=31785
[ 299.335269] (t=147006 jiffies g=3197 q=35014)
[ 299.335269] NMI backtrace for cpu 2
[ 299.335269] CPU: 2 PID: 781 Comm: sh Not tainted 5.8.11-rc1 #1
[ 299.335269] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 299.335269] Call Trace:
[ 299.335269] <IRQ>
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] dump_stack+0x81/0xba
[ 299.335269] nmi_cpu_backtrace.cold+0x14/0x54
[ 299.335269] ? lapic_can_unplug_cpu.cold+0x3b/0x3b
[ 299.335269] nmi_trigger_cpumask_backtrace+0x85/0x92
[ 299.335269] arch_trigger_cpumask_backtrace+0x19/0x20
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] rcu_dump_cpu_stacks+0xa0/0xd2
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] rcu_sched_clock_irq.cold+0x23a/0x41c
[ 299.335269] ? rcu_sched_clock_irq+0x5/0x490
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] update_process_times+0x28/0x60
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] tick_sched_handle.isra.0+0x34/0x50
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] tick_sched_timer+0x40/0x80
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] __hrtimer_run_queues+0x96/0x2b0
[ 299.335269] ? tick_sched_handle.isra.0+0x50/0x50
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] hrtimer_interrupt+0x109/0x220
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] __sysvec_apic_timer_interrupt+0x64/0x100
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] asm_call_on_stack+0x12/0x20
[ 299.335269] </IRQ>
[ 299.335269] sysvec_apic_timer_interrupt+0x7e/0x90
[ 299.335269] asm_sysvec_apic_timer_interrupt+0x12/0x20
[ 299.335269] RIP: 0010:trace_graph_return+0xcf/0xf0
[ 299.335269] Code: e8 26 fe ff ff f0 ff 0b 41 f7 c5 00 02 00 00 75
11 41 55 9d e8 b2 d2 ff ff 5b 41 5c 41 5d 41 5e 5d c3 e8 54 cf ff ff
41 55 9d <5b> 41 5c 41 5d 41 5e 5d c3 48 81 a2 c8 09 00 00 ff fb ff ff
e9 56
[ 299.335269] RSP: 0018:ffffa932c09479b8 EFLAGS: 00000246
[ 299.335269] RAX: ffffa932c09479d8 RBX: ffff8ce37bd2ca20 RCX: 0000000000000000
[ 299.335269] RDX: 0000000000000001 RSI: ffffffff9caa81ad RDI: ffffffff9caa3bec
[ 299.335269] RBP: ffffa932c09479d8 R08: ffff8ce36198b680 R09: ffff8ce3619a6000
[ 299.335269] R10: 0000000000000148 R11: ffff8ce3619a6158 R12: ffffa932c09479ec
[ 299.335269] R13: 0000000000000246 R14: ffffffff9e274520 R15: ffffffff9ce140b0
[ 299.335269] ? bad_get_user+0xd/0xd
[ 299.335269] ? ftrace_return_to_handler+0x8d/0xf0
[ 299.335269] ? trace_graph_return+0xcc/0xf0
[ 299.335269] ? stack_trace_call+0x66/0x2f0
[ 299.335269] ? insn_get_opcode.part.0+0xb7/0x1a0
[ 299.335269] ftrace_return_to_handler+0x8d/0xf0
[ 299.335269] return_to_handler+0x15/0x30
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] ? stack_trace_call+0x66/0x2f0
[ 299.335269] ? ftrace_ops_test+0x33/0x50
[ 299.335269] ? insn_get_opcode.part.0+0xb7/0x1a0
[ 299.335269] ? bad_get_user+0xd/0xd
[ 299.335269] ftrace_ops_list_func+0x103/0x120
[ 299.335269] ? release_hwdep_device+0x20/0x20
[ 299.335269] ftrace_call+0x5/0x34
[ 299.335269] ? trace_hardirqs_on+0x38/0xf0
[ 299.335269] ? ftrace_return_to_handler+0x8d/0xf0
[ 299.335269] ? inat_get_opcode_attribute+0x5/0x20
[ 299.335269] inat_get_opcode_attribute+0x5/0x20
[ 299.335269] insn_get_opcode.part.0+0xb7/0x1a0
[ 299.335269] ? inat_get_opcode_attribute+0x5/0x20
[ 299.335269] ? insn_get_opcode.part.0+0xb7/0x1a0
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] insn_get_modrm.part.0+0x62/0xf0
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] insn_get_sib.part.0+0x40/0x60
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] insn_get_displacement.part.0+0x84/0xd0
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] insn_get_immediate.part.0+0x1ae/0x330
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] insn_get_length+0x2c/0x40
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] text_poke_loc_init+0x6f/0x160
[ 299.335269] ? release_hwdep_device+0x20/0x20
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] text_poke_queue+0x84/0xd0
[ 299.335269] ? ftrace_graph_caller+0xc0/0xc0
[ 299.335269] ftrace_replace_code+0x11f/0x170
[ 299.335269] ftrace_modify_all_code+0xc8/0x160
[ 299.335269] arch_ftrace_update_code+0x9/0x10
[ 299.335269] ftrace_run_update_code+0x1a/0x70
[ 299.335269] ftrace_startup_enable+0x2e/0x50
[ 299.335269] ftrace_startup+0xa4/0x100
[ 299.335269] register_ftrace_function+0x25/0x70
[ 299.335269] stack_trace_sysctl+0x77/0x9c
[ 299.335269] proc_sys_call_handler+0x164/0x190
[ 299.335269] proc_sys_write+0x14/0x20
[ 299.335269] vfs_write+0xc9/0x200
[ 299.335269] ksys_write+0x67/0xe0
[ 299.335269] __x64_sys_write+0x1a/0x20
[ 299.335269] do_syscall_64+0x51/0x90
[ 299.335269] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 299.335269] RIP: 0033:0x7f1163016144
[ 299.335269] Code: 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00
00 00 00 00 66 90 48 8d 05 c1 e7 2c 00 8b 00 85 c0 75 13 b8 01 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89
f5 53
[ 299.335269] RSP: 002b:00007ffe884a34d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 299.335269] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f1163016144
[ 299.335269] RDX: 0000000000000002 RSI: 0000000001852ea0 RDI: 0000000000000001
[ 299.335269] RBP: 0000000001852ea0 R08: 000000000000000a R09: 00007f11630633e0
[ 299.335269] R10: 000000000000000a R11: 0000000000000246 R12: 00007f11632e0760
[ 299.335269] R13: 0000000000000002 R14: 00007f11632db760 R15: 0000000000000002
full test log,
https://lkft.validation.linaro.org/scheduler/job/1779500#L1155
https://lkft.validation.linaro.org/scheduler/job/1779336#L1180
https://lkft.validation.linaro.org/scheduler/job/1779359#L1774
--
Linaro LKFT
https://lkft.linaro.org
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