rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P13484 P13174/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=140245, q=575 ncpus=2)
task:udevd state:R running task stack:24208 pid:13174 tgid:13174 ppid:4674 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1688 [inline]
zap_pmd_range mm/memory.c:1736 [inline]
zap_pud_range mm/memory.c:1765 [inline]
zap_p4d_range mm/memory.c:1786 [inline]
unmap_page_range+0x3818/0x42c0 mm/memory.c:1807
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1897
exit_mmap+0x264/0xc80 mm/mmap.c:3412
__mmput+0x115/0x380 kernel/fork.c:1345
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x27f0 kernel/exit.c:869
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
__do_sys_exit_group kernel/exit.c:1042 [inline]
__se_sys_exit_group kernel/exit.c:1040 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe9ebafca90
RSP: 002b:00007ffcc776a0a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe9ebafca90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000007 R09: 9fbda96063898afe
R10: 00000000ffffffff R11: 0000000000000202 R12: 000055acb5409fe0
R13: 00007ffcc776a0e8 R14: 0000000000000001 R15: 000055acb53e2910
task:syz.3.1097 state:R running task stack:23800 pid:13484 tgid:13483 ppid:12931 flags:0x00004002
Call Trace:
sched_show_task+0x506/0x6d0 kernel/sched/core.c:7432
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:262 [inline]
print_other_cpu_stall+0x11f9/0x15a0 kernel/rcu/tree_stall.h:639
check_cpu_stall kernel/rcu/tree_stall.h:799 [inline]
rcu_pending kernel/rcu/tree.c:4343 [inline]
rcu_sched_clock_irq+0xa2c/0x10d0 kernel/rcu/tree.c:2670
update_process_times+0x1ce/0x230 kernel/time/timer.c:2485
tick_sched_handle kernel/time/tick-sched.c:276 [inline]
tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x551/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:prandom_u32_state+0x1e/0x180 lib/random32.c:55
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 49 89 fc 49 bf 00 00 00 00 00 fc ff df e8 32 f9 ec fc <4c> 89 e0 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 d4 00 00 00 41 8b
RSP: 0018:ffffc900041f7898 EFLAGS: 00000246
RAX: ffffffff84a6932e RBX: ffffffff8e08aa58 RCX: 0000000000040000
RDX: ffffc90004b91000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000001 R08: ffffffff81a2c01a R09: 1ffff110069cfb40
R10: dffffc0000000000 R11: ffffffffa0001ad4 R12: ffff8880b8936448
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
____bpf_user_rnd_u32 kernel/bpf/core.c:2836 [inline]
bpf_user_rnd_u32+0x6a/0xc0 kernel/bpf/core.c:2824
bpf_prog_d4a52e119b87a762+0x47/0x4b
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:682 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
bpf_test_run+0x7b8/0xa90 net/bpf/test_run.c:433
bpf_prog_test_run_skb+0xc97/0x1820 net/bpf/test_run.c:1094
bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4313
__sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5728
__do_sys_bpf kernel/bpf/syscall.c:5817 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5815 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f76c4b7def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f76c58a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f76c4d35f80 RCX: 00007f76c4b7def9
RDX: 0000000000000050 RSI: 0000000020000d80 RDI: 000000000000000a
RBP: 00007f76c4bf09f6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f76c4d35f80 R15: 00007ffdc9186e38
rcu: rcu_preempt kthread starved for 10469 jiffies! g140245 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:26048 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111