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rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 ticks this GP) idle=b3d/1/0x4000000000000000 softirq=141482/141482 fqs=0 (t=29643 jiffies g=207277 q=207) rcu: rcu_preempt kthread timer wakeup didn't happen for 29642 jiffies! g207277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=137716 rcu: rcu_preempt kthread starved for 29643 jiffies! g207277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:26936 pid: 15 ppid: 2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5026 [inline] __schedule+0x12c4/0x4590 kernel/sched/core.c:6372 schedule+0x11b/0x1f0 kernel/sched/core.c:6455 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884 rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 0 CPU: 0 PID: 2338 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:481 print_cpu_stall kernel/rcu/tree_stall.h:625 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3911 [inline] rcu_sched_clock_irq+0xf21/0x1770 kernel/rcu/tree.c:2606 update_process_times+0x196/0x200 kernel/time/timer.c:1788 tick_sched_handle kernel/time/tick-sched.c:237 [inline] tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:stack_not_used include/linux/sched/task_stack.h:105 [inline] RIP: 0010:check_stack_usage kernel/exit.c:757 [inline] RIP: 0010:do_exit+0x1a05/0x2480 kernel/exit.c:915 Code: f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 ab b8 7c 00 4a 83 3c 3b 00 75 0b e8 0f 4d 33 00 49 83 c7 08 <eb> ce 44 8b 35 02 48 2f 0b 4c 89 ff 4c 89 f6 e8 d7 4e 33 00 4d 39 RSP: 0018:ffffc900046b7d80 EFLAGS: 00000216 RAX: ffffffff814cb391 RBX: ffffc900046b0000 RCX: ffff88803fb53b80 RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc900046b6448 RBP: ffffc900046b7ec0 R08: ffffffff81559de1 R09: ffffed10035d2541 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff11007f6a81b R14: ffff88801b299380 R15: 0000000000006450 do_group_exit+0x144/0x310 kernel/exit.c:994 __do_sys_exit_group kernel/exit.c:1005 [inline] __se_sys_exit_group kernel/exit.c:1003 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f581ca30389 Code: Unable to access opcode bytes at RIP 0x7f581ca3035f. RSP: 002b:00007ffcb6b872c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f581ca30389 RDX: 00007f581c9e212b RSI: ffffffffffffffb8 RDI: 0000000000000000 RBP: 0000000000000000 R08: 00007f581c5a4000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb6b873b0 </TASK> NMI backtrace for cpu 0 CPU: 0 PID: 2338 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3911 [inline] rcu_sched_clock_irq+0xf26/0x1770 kernel/rcu/tree.c:2606 update_process_times+0x196/0x200 kernel/time/timer.c:1788 tick_sched_handle kernel/time/tick-sched.c:237 [inline] tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:stack_not_used include/linux/sched/task_stack.h:105 [inline] RIP: 0010:check_stack_usage kernel/exit.c:757 [inline] RIP: 0010:do_exit+0x1a05/0x2480 kernel/exit.c:915 Code: f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 ab b8 7c 00 4a 83 3c 3b 00 75 0b e8 0f 4d 33 00 49 83 c7 08 <eb> ce 44 8b 35 02 48 2f 0b 4c 89 ff 4c 89 f6 e8 d7 4e 33 00 4d 39 RSP: 0018:ffffc900046b7d80 EFLAGS: 00000216 RAX: ffffffff814cb391 RBX: ffffc900046b0000 RCX: ffff88803fb53b80 RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc900046b6448 RBP: ffffc900046b7ec0 R08: ffffffff81559de1 R09: ffffed10035d2541 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff11007f6a81b R14: ffff88801b299380 R15: 0000000000006450 do_group_exit+0x144/0x310 kernel/exit.c:994 __do_sys_exit_group kernel/exit.c:1005 [inline] __se_sys_exit_group kernel/exit.c:1003 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f581ca30389 Code: Unable to access opcode bytes at RIP 0x7f581ca3035f. RSP: 002b:00007ffcb6b872c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f581ca30389 RDX: 00007f581c9e212b RSI: ffffffffffffffb8 RDI: 0000000000000000 RBP: 0000000000000000 R08: 00007f581c5a4000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb6b873b0 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2023/06/28 21:30 | linux-5.15.y | 4af60700a60c | ca69c785 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-linux-5-15-kasan | INFO: rcu detected stall in sys_exit_group |