rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=fda/1/0x4000000000000002 softirq=14643/14644 fqs=0
(t=10500 jiffies g=6829 q=205)
rcu: rcu_preempt kthread starved for 10500 jiffies! g6829 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt R running task 28752 10 2 0x80004000
Call Trace:
context_switch kernel/sched/core.c:3385 [inline]
__schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
schedule+0x181/0x210 kernel/sched/core.c:4155
schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
kthread+0x332/0x350 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 0
CPU: 0 PID: 8652 Comm: syz-executor.0 Not tainted 5.5.0-rc5-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+0x1fb/0x318 lib/dump_stack.c:118
nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
rcu_pending kernel/rcu/tree.c:2827 [inline]
rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271
update_process_times+0x12d/0x180 kernel/time/timer.c:1726
tick_sched_handle kernel/time/tick-sched.c:167 [inline]
tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
__run_hrtimer kernel/time/hrtimer.c:1517 [inline]
__hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579
hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:35 [inline]
RIP: 0010:memcg_kmem_enabled include/linux/memcontrol.h:1389 [inline]
RIP: 0010:memcg_kmem_uncharge include/linux/memcontrol.h:1401 [inline]
RIP: 0010:free_thread_stack+0x11f/0x590 kernel/fork.c:284
Code: 3e e8 45 73 ee ff 48 c1 e8 06 48 83 e0 c0 48 bf 00 00 00 00 00 ea ff ff 48 01 c7 be 03 00 00 00 e8 86 91 61 00 e9 5d 04 00 00 3c 2c 2e 00 48 89 df 31 f6 e8 02 8d 6f 00 43 80 3c 2e 00 74 08
RSP: 0018:ffffc90001e97bd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff11014ea4a71 RBX: ffffea00025a9d00 RCX: ffff8880a7daa580
RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00025a9d00
RBP: ffffc90001e97c08 R08: 000000000003a728 R09: ffffed10124cda91
R10: ffffed10124cda91 R11: 0000000000000000 R12: ffff8880a7525420
R13: dffffc0000000000 R14: 1ffff11014ea4a84 R15: ffff88809266d478
release_task_stack kernel/fork.c:440 [inline]
put_task_stack+0xa3/0x130 kernel/fork.c:451
finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
context_switch kernel/sched/core.c:3388 [inline]
__schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
schedule+0x181/0x210 kernel/sched/core.c:4155
freezable_schedule include/linux/freezer.h:172 [inline]
do_nanosleep+0x1d0/0x6c0 kernel/time/hrtimer.c:1874
hrtimer_nanosleep+0x3a6/0x5b0 kernel/time/hrtimer.c:1927
__do_sys_nanosleep kernel/time/hrtimer.c:1961 [inline]
__se_sys_nanosleep kernel/time/hrtimer.c:1948 [inline]
__x64_sys_nanosleep+0x186/0x1d0 kernel/time/hrtimer.c:1948
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4593f0
Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 41 f5 61 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 d1 fb ff c3 48 83 ec 08 e8 ea 46 00 00
RSP: 002b:00007ffeef178e38 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 00000000000124c8 RCX: 00000000004593f0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffeef178e40
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000002175940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008
R13: 00007ffeef178e90 R14: 00000000000124aa R15: 00007ffeef178ea0