rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=1e64/1/0x4000000000000000 softirq=82525/82525 fqs=4
rcu: 	(detected by 0, t=10502 jiffies, g=79377, q=625 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12483 Comm: syz-executor Not tainted 6.12.0-rc5-syzkaller-00063-g0fc810ae3ae1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_acquire+0xbb7/0x2050 kernel/locking/lockdep.c:5156
Code: 8b 44 24 18 83 38 00 74 75 4c 89 e7 48 89 ee ba 05 00 00 00 eb 51 85 c0 74 22 45 31 f6 4c 89 e7 48 89 ee 31 d2 e8 69 65 00 00 <48> ba 00 00 00 00 00 fc ff df 85 c0 0f 84 47 08 00 00 48 8b 44 24
RSP: 0018:ffffc90000a18950 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 1ffff110043eacaa RCX: ffffffff8170bfba
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942cc800
RBP: ffff888021f56530 R08: ffffffff942cc807 R09: 1ffffffff2859900
R10: dffffc0000000000 R11: fffffbfff2859901 R12: ffff888021f55a00
R13: ffff888021f564d8 R14: 0000000000000000 R15: ffff888021f56550
FS:  0000555594231500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c396018 CR3: 0000000027046000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x158/0x390 lib/debugobjects.c:763
 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
 __run_hrtimer kernel/time/hrtimer.c:1659 [inline]
 __hrtimer_run_queues+0x305/0xd50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_register_key+0x11f/0x3f0 kernel/locking/lockdep.c:1240
Code: 45 01 48 c7 c1 00 f0 18 93 48 39 c8 76 18 4c 89 ef e8 f5 d8 6c 00 84 c0 75 0c 4c 89 ef e8 89 15 0f 00 84 c0 74 4d 90 0f 0b 90 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 3e 00 00 00 00 66 43 c7 44 3e
RSP: 0018:ffffc90004396b80 EFLAGS: 00000206
RAX: f694bb5a20bbdd00 RBX: 1ffff92000872d78 RCX: ffffffff9a3d3903
RDX: 0000000000000000 RSI: ffffffff8c0ad7a0 RDI: ffffffff8c610420
RBP: ffffc90004396c50 R08: ffffffff901d04af R09: 1ffffffff203a095
R10: dffffc0000000000 R11: fffffbfff203a096 R12: ffffc90004396bc0
R13: ffff88806d48da98 R14: dffffc0000000000 R15: 1ffff92000872d74
 qdisc_alloc+0x19f/0xa80 net/sched/sch_generic.c:959
 qdisc_create_dflt+0x62/0x4b0 net/sched/sch_generic.c:1014
 attach_one_default_qdisc net/sched/sch_generic.c:1180 [inline]
 netdev_for_each_tx_queue include/linux/netdevice.h:2504 [inline]
 attach_default_qdiscs net/sched/sch_generic.c:1198 [inline]
 dev_activate+0x3c0/0x1240 net/sched/sch_generic.c:1257
 __dev_open+0x352/0x450 net/core/dev.c:1485
 __dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8841
 dev_change_flags+0x8b/0x1a0 net/core/dev.c:8913
 do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
 __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
 rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
 rtnetlink_rcv_msg+0x741/0xcf0 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f8/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x223/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 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: 0033:0x7f2576f805ac
Code: 2a 5a 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5a 02 00 48 8b
RSP: 002b:00007ffc2b5b9410 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f2577c64620 RCX: 00007f2576f805ac
RDX: 0000000000000020 RSI: 00007f2577c64670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc2b5b9464 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f2577c64670 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10494 jiffies! g79377 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:25552 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 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 UID: 0 PID: 10486 Comm: kworker/u8:14 Not tainted 6.12.0-rc5-syzkaller-00063-g0fc810ae3ae1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x19f8/0x2ca0 kernel/smp.c:884
Code: 89 e6 83 e6 01 31 ff e8 86 f3 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 31 ef 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 15 ef 0b 00 eb e4 44
RSP: 0018:ffffc9000b6776e0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff110170e8919 RCX: ffff88802ee8bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000b6778e0 R08: ffffffff8188eada R09: 1ffffffff2859900
R10: dffffc0000000000 R11: fffffbfff2859901 R12: dffffc0000000000
R13: ffff8880b87448c8 R14: ffff8880b863fc80 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1757062d8 CR3: 000000000e734000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2085 [inline]
 text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2295
 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate+0xbc/0x260 mm/kfence/core.c:849
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 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>