rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=c17/1/0x4000000000000000 softirq=58572/58574 fqs=1
(detected by 1, t=10502 jiffies, g=88625, q=224)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7388 Comm: syz-executor.5 Tainted: G W 5.17.0-syzkaller-01442-gb47d5a4f6b8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1701 [inline]
RIP: 0010:__hrtimer_run_queues+0x27a/0xe50 kernel/time/hrtimer.c:1749
Code: 74 44 e8 69 b0 10 00 48 8d 7b 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 06 0f 8e fa 0a 00 00 <44> 0f b6 63 38 31 ff 41 83 e4 01 44 89 e6 e8 93 b3 10 00 45 84 e4
RSP: 0018:ffffc90000007e40 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807813db40 RCX: 0000000000000000
RDX: 1ffff1100f027b6f RSI: ffffffff816777d7 RDI: ffff88807813db78
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff816777cd R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9c2a700 R14: ffff8880b9c2a600 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1300df090 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:199
Code: 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 79 47 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 <65> 48 8b 14 25 00 70 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82
RSP: 0018:ffffc90002c87760 EFLAGS: 00000246
RAX: 0000000080000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffffc90002c87a40 RSI: ffffffff81ad5da1 RDI: ffffc90002c87a58
RBP: ffffea0001b1cac0 R08: 000000000006c72b R09: 0000000000000001
R10: ffffffff81ad5ce1 R11: 0000000000000000 R12: ffffc90002c87a60
R13: ffff88806d7daa98 R14: dffffc0000000000 R15: 00007fd12f154000
_compound_head include/linux/page-flags.h:195 [inline]
PageAnon include/linux/page-flags.h:587 [inline]
zap_pte_range mm/memory.c:1370 [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+0xcd1/0x2a30 mm/memory.c:1561
unmap_single_vma+0x198/0x310 mm/memory.c:1606
unmap_vmas+0x16b/0x2f0 mm/memory.c:1638
exit_mmap+0x200/0x6a0 mm/mmap.c:3178
__mmput+0x122/0x4b0 kernel/fork.c:1180
mmput+0x56/0x60 kernel/fork.c:1202
exit_mm kernel/exit.c:507 [inline]
do_exit+0xa12/0x29d0 kernel/exit.c:793
do_group_exit+0xd2/0x2f0 kernel/exit.c:936
get_signal+0x45a/0x2490 kernel/signal.c:2903
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:186 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:221
__syscall_exit_to_user_mode_work kernel/entry/common.c:303 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:314
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd12ffcb049
Code: Unable to access opcode bytes at RIP 0x7fd12ffcb01f.
RSP: 002b:00007fd12e940218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007fd1300ddf68 RCX: 00007fd12ffcb049
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fd1300ddf6c
RBP: 00007fd1300ddf60 R08: 00007ffc795f4080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd1300ddf6c
R13: 00007ffc7959cc4f R14: 00007fd12e940300 R15: 0000000000022000
rcu: rcu_preempt kthread starved for 10495 jiffies! g88625 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:28880 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0xa94/0x4910 kernel/sched/core.c:6304
schedule+0xd2/0x1f0 kernel/sched/core.c:6376
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1971
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
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:
NMI backtrace for cpu 1
CPU: 1 PID: 4027 Comm: kworker/u4:7 Tainted: G W 5.17.0-syzkaller-01442-gb47d5a4f6b8d #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:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 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:490
print_other_cpu_stall kernel/rcu/tree_stall.h:595 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:741 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq+0x2068/0x2110 kernel/rcu/tree.c:2625
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
__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:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:200
Code: 81 e1 00 01 00 00 65 48 8b 14 25 00 70 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 <83> f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 48
RSP: 0018:ffffc90003f3f9e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffe8ffffc0b960 RCX: 0000000000000000
RDX: ffff8880450fa040 RSI: ffffffff816c99f4 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816c9a1a R11: 0000000000000000 R12: fffff91ffff8172d
R13: 0000000000000000 R14: ffffe8ffffc0b968 R15: 0000000000000001
rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
csd_lock_wait kernel/smp.c:440 [inline]
smp_call_function_many_cond+0x4e4/0xc90 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:1112 [inline]
text_poke_bp_batch+0x21d/0x6f0 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+0x32f/0x410 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:735 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:727
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
----------------
Code disassembly (best guess):
0: 74 44 je 0x46
2: e8 69 b0 10 00 callq 0x10b070
7: 48 8d 7b 38 lea 0x38(%rbx),%rdi
b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
12: fc ff df
15: 48 89 fa mov %rdi,%rdx
18: 48 c1 ea 03 shr $0x3,%rdx
1c: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
20: 84 c0 test %al,%al
22: 74 06 je 0x2a
24: 0f 8e fa 0a 00 00 jle 0xb24
* 2a: 44 0f b6 63 38 movzbl 0x38(%rbx),%r12d <-- trapping instruction
2f: 31 ff xor %edi,%edi
31: 41 83 e4 01 and $0x1,%r12d
35: 44 89 e6 mov %r12d,%esi
38: e8 93 b3 10 00 callq 0x10b3d0
3d: 45 84 e4 test %r12b,%r12b