rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=f6b4/1/0x4000000000000000 softirq=124502/124503 fqs=1
rcu: (detected by 1, t=10502 jiffies, g=197989, q=260 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 29790 Comm: syz-executor.2 Not tainted 6.9.0-rc2-next-20240405-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:103 [inline]
RIP: 0010:lock_release+0x16d/0x9f0 kernel/locking/lockdep.c:5770
Code: eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 0c 71 88 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00 00 00 00 00 00 9c 8f 84 24 b0 00 00 00 <42> 80 3c 3b 00 74 08 4c 89 f7 e8 f4 6f 88 00 48 8b 9c 24 b0 00 00
RSP: 0018:ffffc90000007a60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff92000000f62 RCX: ffffffff81722be0
RDX: 0000000000000000 RSI: ffffffff8c1f9f40 RDI: ffffffff8c1f9f00
RBP: ffffc90000007b90 R08: ffffffff8fac016f R09: 1ffffffff1f5802d
R10: dffffc0000000000 R11: fffffbfff1f5802e R12: 1ffff92000000f58
R13: ffffffff84b63f05 R14: ffffc90000007b10 R15: dffffc0000000000
FS: 00007f6ccfaa46c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32323000 CR3: 0000000063ddc000 CR4: 00000000003506f0
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
debug_object_deactivate+0x2d5/0x390 lib/debugobjects.c:778
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1660 [inline]
__hrtimer_run_queues+0x30f/0xd50 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
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:unwind_next_frame+0xa34/0x2a00 arch/x86/kernel/unwind_orc.c:521
Code: 0f b6 04 28 84 c0 0f 85 90 1c 00 00 0f b6 1b 31 ff 89 de e8 6e b6 54 00 85 db 0f 84 3c 05 00 00 e8 61 b3 54 00 e9 61 05 00 00 57 b3 54 00 48 8b 04 24 48 8d 58 40 48 89 d8 48 c1 e8 03 42 80
RSP: 0018:ffffc9000541ef28 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffc9000541f038 RCX: 0000000000040000
RDX: 0000000000000008 RSI: ffffffff8e1a2e00 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000005 R09: ffffffff8140d7de
R10: 0000000000000008 R11: ffff88807db01e00 R12: ffffffff8fc52304
R13: dffffc0000000000 R14: ffffc9000541f050 R15: 1ffff92000a83e00
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2190 [inline]
slab_free mm/slub.c:4393 [inline]
kmem_cache_free+0x145/0x340 mm/slub.c:4468
ip_rcv_finish_core+0xfd4/0x1b40 net/ipv4/ip_input.c:424
ip_rcv_finish+0x14a/0x560 net/ipv4/ip_input.c:447
NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
__netif_receive_skb_one_core net/core/dev.c:5604 [inline]
__netif_receive_skb+0x2bf/0x650 net/core/dev.c:5718
netif_receive_skb_internal net/core/dev.c:5804 [inline]
netif_receive_skb+0x1e8/0x890 net/core/dev.c:5864
tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1549
tun_get_user+0x2f0b/0x4530 drivers/net/tun.c:2002
tun_chr_write_iter+0x113/0x1f0 drivers/net/tun.c:2048
call_write_iter include/linux/fs.h:2106 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f6ccec7cbaf
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f6ccfaa4090 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6ccedabf80 RCX: 00007f6ccec7cbaf
RDX: 000000000000006c RSI: 0000000020000000 RDI: 00000000000000c8
RBP: 00007f6ccecca47a R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000006c R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6ccedabf80 R15: 00007fff901e80c8
rcu: rcu_preempt kthread starved for 10500 jiffies! g197989 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:24400 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1683
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1882
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 11 Comm: kworker/u8:1 Not tainted 6.9.0-rc2-next-20240405-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x1894/0x2a00 kernel/smp.c:855
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 e5 d9 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 90 d5 0b 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 74 d5
RSP: 0018:ffffc900001076e0 EFLAGS: 00000293
RAX: ffffffff8189b83c RBX: 1ffff11017288c3d RCX: ffff888016ebbc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001078e0 R08: ffffffff8189b80b R09: 1ffffffff25ee6a4
R10: dffffc0000000000 R11: fffffbfff25ee6a5 R12: dffffc0000000000
R13: ffff8880b94461e8 R14: ffff8880b953f740 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa64759f000 CR3: 000000000e134000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2086 [inline]
text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2296
text_poke_flush arch/x86/kernel/alternative.c:2487 [inline]
text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2494
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826
process_one_work kernel/workqueue.c:3218 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299
worker_thread+0x86d/0xd70 kernel/workqueue.c:3380
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
vkms_vblank_simulate: vblank timer overrun