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INFO: rcu_sched detected stalls on CPUs/tasks: (detected by 1, t=120002 jiffies, g=14729, c=14728, q=552) All QSes seen, last rcu_sched kthread activity 120002 (4294874770-4294754768), jiffies_till_next_fqs=3, root ->qsmask 0x0 syz-executor7 R running task 59968 6874 4566 0x00000008 Call Trace: <IRQ> sched_show_task+0x600/0x730 kernel/sched/core.c:5279 print_other_cpu_stall kernel/rcu/tree.c:1480 [inline] check_cpu_stall kernel/rcu/tree.c:1598 [inline] __rcu_pending kernel/rcu/tree.c:3361 [inline] rcu_pending kernel/rcu/tree.c:3423 [inline] rcu_check_callbacks+0x292f/0x2cd0 kernel/rcu/tree.c:2763 update_process_times+0x132/0x1a0 kernel/time/timer.c:1636 tick_sched_handle kernel/time/tick-sched.c:162 [inline] tick_sched_timer+0x33b/0x4b0 kernel/time/tick-sched.c:1194 __run_hrtimer kernel/time/hrtimer.c:1349 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1411 hrtimer_interrupt+0x426/0xaf0 kernel/time/hrtimer.c:1469 local_apic_timer_interrupt+0x66/0x230 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 </IRQ> RIP: 0010:rep_nop arch/x86/include/asm/processor.h:657 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:662 [inline] RIP: 0010:queued_spin_lock_slowpath+0x522/0xab0 kernel/locking/qspinlock.c:362 RSP: 0018:ffff88015254f8b0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff12 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90000c65a2e RDX: ffffffff8b311000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88015254f930 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 00000000000000ff R15: ffffc90000c65a04 queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock include/linux/spinlock.h:161 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x79/0x80 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] futex_wake+0x232/0xba0 kernel/futex.c:1536 do_futex+0x28d1/0x6ad0 kernel/futex.c:3531 SYSC_futex+0x3e1/0x810 kernel/futex.c:3587 SyS_futex+0x89/0xb0 kernel/futex.c:3555 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x455389 RSP: 002b:0000000000a3e8e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000072bf58 RCX: 0000000000455389 RDX: ffffffffffffffff RSI: 0000000000000001 RDI: 000000000072bf84 RBP: 0000000000000462 R08: 0000000000a3ea30 R09: 000000000072bf58 R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000a3ea30 R14: 000000000072bf84 R15: 0000000000000001 rcu_sched kthread starved for 120002 jiffies! g14729 c14728 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_sched R running task 61968 8 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2866 [inline] __schedule+0x674/0x730 kernel/sched/core.c:3446 schedule+0x1cc/0x2f0 kernel/sched/core.c:3505 schedule_timeout+0x3e7/0x570 kernel/time/timer.c:1801 rcu_gp_kthread+0x21e1/0x38d0 kernel/rcu/tree.c:2230 kthread+0x539/0x720 kernel/kthread.c:239 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:406
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/04/25 07:41 | https://github.com/google/kmsan.git master | d2d741e5d189 | 37e76fe2 | .config | console log | report | ci-upstream-kmsan-gce |