rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=a77/1/0x4000000000000000 softirq=46303/46305 fqs=6
(detected by 1, t=10502 jiffies, g=87389, q=252)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 21926 Comm: systemd-udevd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
RIP: 0010:__lock_acquire+0xbca/0x54a0 kernel/locking/lockdep.c:5027
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 00 5a d4 8f e8 ee e7 61 00 48 0f a3 1d a6 d6 77 0e <0f> 83 f1 0b 00 00 48 8d 1c 5b 48 c1 e3 06 48 81 c3 20 5e d4 8f 48
RSP: 0018:ffffc90000007c00 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 000000000000005c RCX: ffffffff815c8352
RDX: fffffbfff1fa8b42 RSI: 0000000000000008 RDI: ffffffff8fd45a08
RBP: ffff88803b0d0ad2 R08: 0000000000000000 R09: ffffffff8fd45a0f
R10: fffffbfff1fa8b41 R11: 0000000000000000 R12: ffff88803b0d0ab0
R13: ffff88803b0d0000 R14: 0000000000000001 R15: 42f1125c69a15e59
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558feb202160 CR3: 000000007afc7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5640 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5605
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x243/0xe50 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:instrument_atomic_read include/linux/instrumented.h:71 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
RIP: 0010:folio_memcg_lock+0x17d/0x3e0 mm/memcontrol.c:2043
Code: 81 4c 89 ff e8 f4 15 99 ff 4d 85 e4 0f 85 b0 01 00 00 9c 58 f6 c4 02 0f 85 dc 01 00 00 4d 85 e4 74 01 fb 4c 8d a3 c0 10 00 00 04 00 00 00 4c 89 e7 e8 16 a9 fa ff 4c 89 e0 48 c1 e8 03 42 0f
RSP: 0018:ffffc90016ae7950 EFLAGS: 00000206
RAX: 0000000000000002 RBX: ffff888011874000 RCX: 1ffffffff1fa994e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90016ae7998 R08: 0000000000000001 R09: ffffffff8fd45a17
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880118750c0
R13: dffffc0000000000 R14: fffff940005ce73f R15: ffff888011874688
page_remove_rmap+0x25/0x1480 mm/rmap.c:1348
zap_pte_range mm/memory.c:1357 [inline]
zap_pmd_range mm/memory.c:1467 [inline]
zap_pud_range mm/memory.c:1496 [inline]
zap_p4d_range mm/memory.c:1517 [inline]
unmap_page_range+0xf0e/0x29f0 mm/memory.c:1538
unmap_single_vma+0x198/0x310 mm/memory.c:1583
unmap_vmas+0x16b/0x2f0 mm/memory.c:1615
exit_mmap+0x1d0/0x630 mm/mmap.c:3171
__mmput+0x122/0x4b0 kernel/fork.c:1113
mmput+0x56/0x60 kernel/fork.c:1134
exit_mm kernel/exit.c:507 [inline]
do_exit+0xb27/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
__do_sys_exit_group kernel/exit.c:940 [inline]
__se_sys_exit_group kernel/exit.c:938 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:938
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f64f1f57618
Code: Unable to access opcode bytes at RIP 0x7f64f1f575ee.
RSP: 002b:00007fff41a92f78 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fff41a93040 RCX: 00007f64f1f57618
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007fff41a930f0 R08: 00000000000000e7 R09: fffffffffffffe50
R10: 00000000ffffffff R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 000000000000000e
rcu: rcu_preempt kthread starved for 10490 jiffies! g87389 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:28008 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
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: 833 Comm: kworker/u4:4 Not tainted 5.15.0-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:106
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:3878 [inline]
rcu_sched_clock_irq+0x2125/0x2200 kernel/rcu/tree.c:2597
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:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x457/0xc20 kernel/smp.c:969
Code: 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 90 76 0b 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 33 06 00 00 8b 43 08 31 ff 83 e0 01 41
RSP: 0018:ffffc9000424f9f8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9c41d40 RCX: 0000000000000000
RDX: ffff88801a6bba00 RSI: ffffffff816c4e20 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816c4e46 R11: 0000000000000000 R12: ffffed10173883a9
R13: 0000000000000000 R14: ffff8880b9c41d48 R15: 0000000000000001
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+0x1b3/0x560 arch/x86/kernel/alternative.c:1297
text_poke_flush arch/x86/kernel/alternative.c:1451 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1448 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458
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:732 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:724
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 66 81 e3 ff 1f and $0x1fff,%bx
5: 0f b7 db movzwl %bx,%ebx
8: be 08 00 00 00 mov $0x8,%esi
d: 48 89 d8 mov %rbx,%rax
10: 48 c1 f8 06 sar $0x6,%rax
14: 48 8d 3c c5 00 5a d4 lea -0x702ba600(,%rax,8),%rdi
1b: 8f
1c: e8 ee e7 61 00 callq 0x61e80f
21: 48 0f a3 1d a6 d6 77 bt %rbx,0xe77d6a6(%rip) # 0xe77d6cf
28: 0e
* 29: 0f 83 f1 0b 00 00 jae 0xc20 <-- trapping instruction
2f: 48 8d 1c 5b lea (%rbx,%rbx,2),%rbx
33: 48 c1 e3 06 shl $0x6,%rbx
37: 48 81 c3 20 5e d4 8f add $0xffffffff8fd45e20,%rbx
3e: 48 rex.W