rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=83a/1/0x4000000000000000 softirq=68001/68003 fqs=66
(t=10500 jiffies g=122017 q=379)
rcu: rcu_preempt kthread starved for 10309 jiffies! g122017 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:29160 pid: 10 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:3778 [inline]
__schedule+0xea9/0x2230 kernel/sched/core.c:4527
schedule+0xd0/0x2a0 kernel/sched/core.c:4602
schedule_timeout+0x148/0x250 kernel/time/timer.c:1879
rcu_gp_fqs_loop kernel/rcu/tree.c:1888 [inline]
rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2058
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
NMI backtrace for cpu 1
CPU: 1 PID: 3522 Comm: syz-executor.3 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x198/0x1fd lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318
print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
rcu_pending kernel/rcu/tree.c:3637 [inline]
rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519
update_process_times+0x25/0xa0 kernel/time/timer.c:1710
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
__run_hrtimer kernel/time/hrtimer.c:1524 [inline]
__hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588
hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
__sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:stack_trace_consume_entry+0xd3/0x160 kernel/stacktrace.c:93
Code: 02 00 0f 85 92 00 00 00 8d 45 01 89 43 10 48 8b 03 48 8d 2c e8 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 5c 48 89 75 00 8b 43 08 39 43 10 0f 92 c0 48 83 c4 08 5b 5d c3
RSP: 0018:ffffc90000da87e0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc90000da88b8 RCX: 0000000000000000
RDX: 1ffff920001b512f RSI: ffffffff882001f7 RDI: ffffc90000da88c4
RBP: ffffc90000da8978 R08: ffffffff8b203cd8 R09: 0000000000000001
R10: 000000000007201e R11: 0000000000000001 R12: ffffc90000da88b8
R13: 0000000000000000 R14: ffff888202bb2580 R15: 00000000000000e0
arch_stack_walk+0x71/0xf0 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48
kasan_set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461
slab_post_alloc_hook mm/slab.h:518 [inline]
slab_alloc_node mm/slab.c:3254 [inline]
kmem_cache_alloc_node+0x136/0x3e0 mm/slab.c:3574
__alloc_skb+0x71/0x550 net/core/skbuff.c:198
alloc_skb include/linux/skbuff.h:1094 [inline]
mrp_pdu_init net/802/mrp.c:300 [inline]
mrp_pdu_append_vecattr_event+0x7b4/0x1020 net/802/mrp.c:399
mrp_attr_event+0x173/0x220 net/802/mrp.c:494
mrp_mad_event net/802/mrp.c:574 [inline]
mrp_join_timer+0x5a/0xc0 net/802/mrp.c:591
call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
__do_softirq+0x1f7/0xa91 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x235/0x280 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 58 3c b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 86 08 bf 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 5b 81 58 f9 65 8b 05 94 ca 0a 78 85 c0 74 02 5d
RSP: 0018:ffffc9001215fab0 EFLAGS: 00000282
RAX: 1ffffffff136c78b RBX: ffff888202bb2580 RCX: 0000000000000007
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8880ae735e00 R08: 0000000000000001 R09: ffffffff8c5f59ff
R10: fffffbfff18beb3f R11: 0000000000000001 R12: ffff8880ae735e00
R13: ffff88804d734180 R14: 0000000000000000 R15: 0000000000000001
finish_lock_switch kernel/sched/core.c:3517 [inline]
finish_task_switch+0x147/0x750 kernel/sched/core.c:3617
context_switch kernel/sched/core.c:3781 [inline]
__schedule+0xeb1/0x2230 kernel/sched/core.c:4527
preempt_schedule_irq+0xbf/0x1b0 kernel/sched/core.c:4785
irqentry_exit_cond_resched kernel/entry/common.c:356 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:348 [inline]
irqentry_exit+0x65/0x90 kernel/entry/common.c:386
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:lock_acquire+0x27b/0xae0 kernel/locking/lockdep.c:5009
Code: ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 04 07 00 00 48 83 3d e8 cb 5b 08 00 0f 84 5a 05 00 00 4c 89 ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 08 48 c7
RSP: 0018:ffffc9001215fce0 EFLAGS: 00000282
RAX: 1ffffffff136c789 RBX: ffff888202bb2580 RCX: ffffffff815a184b
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000282
RBP: ffff88809ec94ca8 R08: 0000000000000000 R09: ffffffff8c5f59ff
R10: fffffbfff18beb3f R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000282
__might_fault mm/memory.c:4870 [inline]
__might_fault+0x152/0x1d0 mm/memory.c:4855
_copy_to_user+0x29/0x160 lib/usercopy.c:27
copy_to_user include/linux/uaccess.h:168 [inline]
put_timespec64+0xb2/0x120 kernel/time/time.c:812
__do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline]
__se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline]
__x64_sys_clock_gettime+0x1ac/0x240 kernel/time/posix-timers.c:1082
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4603fa
Code: 25 18 00 00 00 00 74 01 f0 48 0f b1 3d 6f 9a 24 01 48 39 c2 75 da f3 c3 0f 1f 84 00 00 00 00 00 48 63 ff b8 e4 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007f05161fbc58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4
RAX: ffffffffffffffda RBX: 00000000004c8449 RCX: 00000000004603fa
RDX: 0000000000000000 RSI: 00007f05161fbc60 RDI: 0000000000000001
RBP: 000000000118cf40 R08: 0000000000000016 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000118cf4c
R13: 000000000169fb6f R14: 00007f05161fc9c0 R15: 000000000118cf4c