rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (8 ticks this GP) idle=441c/1/0x4000000000000000 softirq=152524/152524 fqs=5
rcu: 	(detected by 1, t=10505 jiffies, g=207129, q=442 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18786 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller-00115-g9fdfb15a3dbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_preemption_disabled+0x20/0x110 lib/smp_processor_id.c:16
Code: 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d 3c 0a 3a 75 <65> 8b 05 31 0a 3a 75 a9 ff ff ff 7f 74 22 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc900000078a8 EFLAGS: 00000082
RAX: 940e6edd90e59800 RBX: 0000000000000000 RCX: ffffffff816d2b30
RDX: 0000000000000000 RSI: ffffffff8b599580 RDI: ffffffff8b599540
RBP: ffffc90000007a30 R08: ffffffff8e9a66af R09: 1ffffffff1d34cd5
R10: dffffc0000000000 R11: fffffbfff1d34cd6 R12: 1ffff92000000f2c
R13: ffffffff8443de02 R14: dffffc0000000000 R15: dffffc0000000000
FS:  00007f4d0fe346c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a4eec56be CR3: 0000000096fb6000 CR4: 00000000003506f0
DR0: 000000000000d8dd DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:699
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xbf/0x9d0 kernel/locking/lockdep.c:5764
 debug_objects_fill_pool+0xc9/0x990 lib/debugobjects.c:616
 debug_object_activate+0x12b/0x530 lib/debugobjects.c:713
 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
 debug_activate kernel/time/hrtimer.c:477 [inline]
 enqueue_hrtimer+0x30/0x310 kernel/time/hrtimer.c:1087
 __run_hrtimer kernel/time/hrtimer.c:1705 [inline]
 __hrtimer_run_queues+0x6c0/0xd10 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline]
 __sysvec_apic_timer_interrupt+0x104/0x390 arch/x86/kernel/apic/apic.c:1080
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1074
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 ae cf 13 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 83 92 8c f6 65 8b 05 04 f6 2f 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90004f1f580 EFLAGS: 00000206
RAX: 940e6edd90e59800 RBX: 1ffff920009e3eb4 RCX: ffffffff8194715c
RDX: dffffc0000000000 RSI: ffffffff8b599580 RDI: 0000000000000001
RBP: ffffc90004f1f610 R08: ffffffff8e9a66af R09: 1ffffffff1d34cd5
R10: dffffc0000000000 R11: fffffbfff1d34cd6 R12: dffffc0000000000
R13: 1ffff920009e3eb0 R14: ffffc90004f1f5a0 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 __wake_up_common_lock kernel/sched/wait.c:140 [inline]
 __wake_up_sync_key+0x125/0x1c0 kernel/sched/wait.c:213
 __unix_dgram_recvmsg+0x602/0x1260 net/unix/af_unix.c:2389
 sock_recvmsg_nosec+0x86/0xd0 net/socket.c:1027
 ____sys_recvmsg+0x483/0x580 net/socket.c:2758
 ___sys_recvmsg net/socket.c:2802 [inline]
 do_recvmmsg+0x474/0xae0 net/socket.c:2896
 __sys_recvmmsg net/socket.c:2975 [inline]
 __do_sys_recvmmsg net/socket.c:2998 [inline]
 __se_sys_recvmmsg net/socket.c:2991 [inline]
 __x64_sys_recvmmsg+0x199/0x240 net/socket.c:2991
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4d0f07cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4d0fe340c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f4d0f19c050 RCX: 00007f4d0f07cae9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000006
RBP: 00007f4d0f0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f4d0f19c050 R15: 00007ffe020548a8
 </TASK>
rcu: rcu_preempt kthread starved for 10490 jiffies! g207129 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:27144 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1613
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1812
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 2074 Comm: kworker/u4:6 Not tainted 6.6.0-rc1-syzkaller-00115-g9fdfb15a3dbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:300 [inline]
RIP: 0010:smp_call_function_many_cond+0x1805/0x2890 kernel/smp.c:844
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 c4 43 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 ff 3f 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 e3 3f
RSP: 0018:ffffc90005b37780 EFLAGS: 00000293
RAX: ffffffff818263ad RBX: 1ffff110173087b9 RCX: ffff888087890000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90005b37980 R08: ffffffff8182637c R09: 1ffffffff1d34cd5
R10: dffffc0000000000 R11: fffffbfff1d34cd6 R12: dffffc0000000000
R13: ffff8880b9843dc8 R14: ffff8880b993d440 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f42a000 CR3: 000000000d130000 CR4: 00000000003506e0
DR0: 000000000000d8dd DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1012
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1998 [inline]
 text_poke_bp_batch+0x350/0xb20 arch/x86/kernel/alternative.c:2208
 text_poke_flush arch/x86/kernel/alternative.c:2399 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2406
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x132/0x250 kernel/jump_label.c:205
 static_key_enable+0x1a/0x20 kernel/jump_label.c:218
 toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:830
 process_one_work+0x781/0x1130 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0xabf/0x1060 kernel/workqueue.c:2784
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>