rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=8134/1/0x4000000000000000 softirq=36595/36598 fqs=0
rcu: 	(detected by 0, t=10505 jiffies, g=52061, q=473 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11763 Comm: syz.3.2102 Not tainted 6.10.0-rc7-syzkaller-00266-g4d145e3f830b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:validate_chain+0x581/0x5900 kernel/locking/lockdep.c:3876
Code: cd ca 8b 48 c7 c6 00 e7 ca 8b e9 5c 04 00 00 e8 35 ba 38 03 89 c3 e8 5e fe fe ff 85 db 0f 85 3a 04 00 00 48 c7 c0 ac c7 ad 8f <48> c1 e8 03 42 0f b6 04 20 84 c0 0f 85 71 48 00 00 83 3d 13 a8 3a
RSP: 0018:ffffc90000a18720 EFLAGS: 00000087
RAX: ffffffff8fadc7ac RBX: 00000000000a4021 RCX: 1ffff92000143104
RDX: 0000000000000001 RSI: ffff88802a83c6e0 RDI: ffff88802a83bc00
RBP: ffffc90000a18a20 R08: ffffffff92fad587 R09: 1ffffffff25f5ab0
R10: dffffc0000000000 R11: fffffbfff25f5ab1 R12: dffffc0000000000
R13: ffff88802a83c700 R14: 58cce5e7c8d5ebdc R15: ffff88802a83bc00
FS:  00007fba3bdcc6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d70bff8 CR3: 000000005dc20000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 rcu_read_lock include/linux/rcupdate.h:781 [inline]
 advance_sched+0xa1e/0xca0 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 99 c9 0b 00 48 83 c4 08 4c 89 f7 e8 cd 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 10 9a 2a 0a e8 bb ed 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc90004f4f1e8 EFLAGS: 00000282
RAX: 991013b04cceb700 RBX: ffff88802a83bc00 RCX: ffffffff947a5603
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: ffffffff8c202900
RBP: ffffc90004f4f230 R08: ffffffff8fad956f R09: 1ffffffff1f5b2ad
R10: dffffc0000000000 R11: fffffbfff1f5b2ae R12: 1ffff110172a7e9f
R13: dffffc0000000000 R14: ffff8880b953e780 R15: ffff8880b953f4f8
 context_switch kernel/sched/core.c:5411 [inline]
 __schedule+0x17f0/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
 unix_wait_for_peer+0x250/0x340 net/unix/af_unix.c:1462
 unix_dgram_sendmsg+0x127a/0x1f80 net/unix/af_unix.c:2080
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x223/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2585
 ___sys_sendmsg net/socket.c:2639 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2725
 __do_sys_sendmmsg net/socket.c:2754 [inline]
 __se_sys_sendmmsg net/socket.c:2751 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2751
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba3af75bd9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fba3bdcc048 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fba3b103f60 RCX: 00007fba3af75bd9
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000007
RBP: 00007fba3afe4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fba3b103f60 R15: 00007fff5d706d28
 </TASK>
rcu: rcu_preempt kthread starved for 10505 jiffies! g52061 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:25136 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 2475 Comm: kworker/u8:8 Not tainted 6.10.0-rc7-syzkaller-00266-g4d145e3f830b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x1860/0x29d0 kernel/smp.c:855
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 c9 0c 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 74 08 0c 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 58 08
RSP: 0018:ffffc90009b7f700 EFLAGS: 00000293
RAX: ffffffff818a1fc8 RBX: 1ffff110172a8899 RCX: ffff8880298b9e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90009b7f8e0 R08: ffffffff818a1f97 R09: 1ffffffff25f5ab0
R10: dffffc0000000000 R11: fffffbfff25f5ab1 R12: dffffc0000000000
R13: ffff8880b95444c8 R14: ffff8880b943f8c0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85dd5e23a0 CR3: 000000005e958000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
 text_poke_bp_batch+0x9ef/0xb30
 text_poke_flush arch/x86/kernel/alternative.c:2470 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2477
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_disable_cpuslocked+0xce/0x1c0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:831
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>