rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=8b1/1/0x4000000000000000 softirq=118766/118766 fqs=5
(t=10500 jiffies g=191413 q=129)
rcu: rcu_preempt kthread starved for 9490 jiffies! g191413 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:28888 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1963
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2136
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10881 Comm: kworker/u4:10 Not tainted 5.17.0-rc1-syzkaller-00418-gf8c7e4ede46f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x447/0xc90 kernel/smp.c:969
Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 3b 82 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 95 06 00 00 8b 43 08 31
RSP: 0018:ffffc9000aa4fa08 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9d3df40 RCX: 0000000000000000
RDX: ffff8880345e60c0 RSI: ffffffff816c22c5 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816c22eb R11: 0000000000000000 R12: ffffed10173a7be9
R13: 0000000000000001 R14: ffff8880b9d3df48 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a7fa6c310 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:1112 [inline]
text_poke_bp_batch+0x1b1/0x510 arch/x86/kernel/alternative.c:1300
text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1467 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1da/0x400 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:734 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:726
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 1
CPU: 1 PID: 13940 Comm: syz-executor.3 Not tainted 5.17.0-rc1-syzkaller-00418-gf8c7e4ede46f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:604 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
rcu_pending kernel/rcu/tree.c:3919 [inline]
rcu_sched_clock_irq.cold+0x5c/0x759 kernel/rcu/tree.c:2617
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:1428
__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+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ce 88 0b f8 48 89 ef e8 86 fe 0b f8 e8 81 ef 2c f8 fb bf 01 00 00 00 16 b2 fe f7 65 8b 05 8f 74 b1 76 85 c0 74 02 5d c3 e8 fb 49 af
RSP: 0018:ffffc90000fd8e08 EFLAGS: 00000206
RAX: 0000000000925bcc RBX: ffffffff874e0c60 RCX: 1ffffffff1ffbf7e
RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001
RBP: ffff8880b9d28480 R08: 0000000000000001 R09: ffffffff8ffd8957
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000fd8e98
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880b9d28480
expire_timers kernel/time/timer.c:1465 [inline]
__run_timers.part.0+0x66c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 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 kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 kernel/kcov.c:200
Code: be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 b9 ca 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 70 02 00 00 01 ff 00 74 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b
RSP: 0018:ffffc9001119f760 EFLAGS: 00000246
RAX: 0000000080000001 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88808bb78200 RSI: ffffffff81acd689 RDI: 0000000000000003
RBP: ffffea0001d88080 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81acd1a2 R11: 0000000000000000 R12: ffffea0001d88088
R13: ffff888013de2c00 R14: dffffc0000000000 R15: 00007f355b781000
PageTail include/linux/page-flags.h:234 [inline]
PageCompound include/linux/page-flags.h:239 [inline]
page_mapcount include/linux/mm.h:816 [inline]
zap_pte_range mm/memory.c:1381 [inline]
zap_pmd_range mm/memory.c:1490 [inline]
zap_pud_range mm/memory.c:1519 [inline]
zap_p4d_range mm/memory.c:1540 [inline]
unmap_page_range+0x1499/0x2a30 mm/memory.c:1561
unmap_single_vma+0x198/0x310 mm/memory.c:1606
unmap_vmas+0x16b/0x2f0 mm/memory.c:1638
exit_mmap+0x201/0x670 mm/mmap.c:3178
__mmput+0x122/0x4b0 kernel/fork.c:1114
mmput+0x56/0x60 kernel/fork.c:1135
exit_mm kernel/exit.c:507 [inline]
do_exit+0xa3c/0x2a30 kernel/exit.c:793
do_group_exit+0xd2/0x2f0 kernel/exit.c:935
get_signal+0x4b0/0x28c0 kernel/signal.c:2862
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f355bee8059
Code: Unable to access opcode bytes at RIP 0x7f355bee802f.
RSP: 002b:00007f355a85d168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000023 RBX: 00007f355bffaf60 RCX: 00007f355bee8059
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f355bf4208d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeeb32d6ef R14: 00007f355a85d300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 0b 00 or (%rax),%eax
2: 85 ed test %ebp,%ebp
4: 74 4d je 0x53
6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
d: fc ff df
10: 4d 89 f4 mov %r14,%r12
13: 4c 89 f5 mov %r14,%rbp
16: 49 c1 ec 03 shr $0x3,%r12
1a: 83 e5 07 and $0x7,%ebp
1d: 49 01 c4 add %rax,%r12
20: 83 c5 03 add $0x3,%ebp
23: e8 3b 82 0b 00 callq 0xb8263
28: f3 90 pause
* 2a: 41 0f b6 04 24 movzbl (%r12),%eax <-- trapping instruction
2f: 40 38 c5 cmp %al,%bpl
32: 7c 08 jl 0x3c
34: 84 c0 test %al,%al
36: 0f 85 95 06 00 00 jne 0x6d1
3c: 8b 43 08 mov 0x8(%rbx),%eax
3f: 31 .byte 0x31