rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (2 ticks this GP) idle=3f7/1/0x4000000000000000 softirq=233993/233993 fqs=361
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11676/1:b.el
(detected by 1, t=10502 jiffies, g=446429, q=2400)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_lock+0x6/0x17b0 kernel/locking/lockdep.c:4554
Code: ff c3 66 90 be 00 00 02 00 48 c7 c7 c0 75 04 8f e8 9f 3a 7c 02 48 98 c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 41 56 41 55 <41> 54 41 89 d4 48 ba 00 00 00 00 00 fc ff df 55 53 48 81 ec 18 01
RSP: 0018:ffffc90000007ac0 EFLAGS: 00000002
RAX: 0000000000000007 RBX: ffff888011ef89dc RCX: 1ffffffff1fa07aa
RDX: 0000000000000004 RSI: ffff888011ef8a70 RDI: ffff888011ef8000
RBP: ffff888011ef8a92 R08: 0000000000000001 R09: ffffffff8fd038e7
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888011ef8a70
R13: ffff888011ef8000 R14: ffff888011ef89f8 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000027c66d0 CR3: 000000000b68e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4488 [inline]
__lock_acquire+0x11d5/0x54a0 kernel/locking/lockdep.c:4969
lock_acquire kernel/locking/lockdep.c:5625 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:661
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer+0x27/0x3e0 kernel/time/hrtimer.c:1084
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0xb02/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:memcmp+0x17b/0x1c0 lib/string.c:958
Code: 0f 9e c6 84 d2 0f 95 c2 40 84 d6 0f 84 48 ff ff ff be 08 00 00 00 4c 89 e7 e8 f1 76 c7 fd e9 4b ff ff ff 48 83 c4 08 31 c0 5b <5d> 41 5c 41 5d 41 5e c3 48 89 df 89 44 24 04 e8 e1 75 c7 fd 8b 44
RSP: 0018:ffffc90000d278e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffff888073dd105a RDI: ffff888029ba8040
RBP: ffff888029ba8046 R08: 0000000000000006 R09: 0000000000000000
R10: ffffffff88828880 R11: 0000000000000000 R12: ffff888029ba8040
R13: 0000000000000006 R14: dffffc0000000000 R15: ffffc90000d279c8
memcmp include/linux/fortify-string.h:235 [inline]
rhashtable_compare include/linux/rhashtable.h:577 [inline]
__rhashtable_lookup+0x5d4/0x770 include/linux/rhashtable.h:602
rhltable_lookup include/linux/rhashtable.h:688 [inline]
sta_info_hash_lookup net/mac80211/sta_info.c:162 [inline]
sta_info_get_bss+0x12b/0x400 net/mac80211/sta_info.c:199
__ieee80211_rx_handle_packet net/mac80211/rx.c:4853 [inline]
ieee80211_rx_list+0x956/0x27d0 net/mac80211/rx.c:4978
ieee80211_rx_napi+0xdb/0x3d0 net/mac80211/rx.c:5001
ieee80211_rx include/net/mac80211.h:4571 [inline]
ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235
tasklet_action_common.constprop.0+0x201/0x2e0 kernel/softirq.c:783
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:920 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
task:kworker/0:23 state:R running task stack:26832 pid:11676 ppid: 2 flags:0x00004000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6287
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6687
irqentry_exit+0x31/0x80 kernel/entry/common.c:427
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593
Code: 83 a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900027a7bb8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920004f4f79 RCX: 48d82a8959cba3c4
RDX: 1ffff110060c885e RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fd038e7
R10: fffffbfff1fa071c R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8b97f960 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
rcu_read_lock include/linux/rcupdate.h:687 [inline]
gc_worker+0x145/0x1030 net/netfilter/nf_conntrack_core.c:1377
process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread starved for 6392 jiffies! g446429 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28736 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 8342 Comm: kworker/u4:2 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:481
print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq+0x2125/0x2200 kernel/rcu/tree.c:2599
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode+0x31/0x40 kernel/kcov.c:175
Code: 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 3c 15 00 00 85 d2 74 0b 8b 86 18 15 00 00 39 f8 0f 94 c0 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0 65 8b 15 c7 d6
RSP: 0018:ffffc90002b379e8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9c38900 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888079b15580 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816ad526 R11: 0000000000000000 R12: ffffed1017387121
R13: 0000000000000000 R14: ffff8880b9c38908 R15: 0000000000000001
write_comp_data kernel/kcov.c:218 [inline]
__sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:284
csd_lock_wait kernel/smp.c:440 [inline]
smp_call_function_many_cond+0x476/0xc20 kernel/smp.c:969
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:929 [inline]
text_poke_bp_batch+0x47d/0x560 arch/x86/kernel/alternative.c:1183
text_poke_flush arch/x86/kernel/alternative.c:1268 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1265 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d5/0x430 kernel/jump_label.c:830
static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:623 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:615
process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: ff c3 inc %ebx
2: 66 90 xchg %ax,%ax
4: be 00 00 02 00 mov $0x20000,%esi
9: 48 c7 c7 c0 75 04 8f mov $0xffffffff8f0475c0,%rdi
10: e8 9f 3a 7c 02 callq 0x27c3ab4
15: 48 98 cltq
17: c3 retq
18: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
1f: 00 00 00 00
23: 90 nop
24: 41 57 push %r15
26: 41 56 push %r14
28: 41 55 push %r13
* 2a: 41 54 push %r12 <-- trapping instruction
2c: 41 89 d4 mov %edx,%r12d
2f: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
36: fc ff df
39: 55 push %rbp
3a: 53 push %rbx
3b: 48 rex.W
3c: 81 .byte 0x81
3d: ec in (%dx),%al
3e: 18 01 sbb %al,(%rcx)