rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=1014/1/0x4000000000000000 softirq=19181/19184 fqs=63
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1352391          7            0
rcu: 	cputime:    28946       4948           11   ==> 33900(ms)
rcu: 	(t=10500 jiffies g=17725 q=1085 ncpus=2)
rcu: rcu_preempt kthread starved for 414 jiffies! g17725 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:27656 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5777 Comm: kworker/u5:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: hci0 hci_cmd_timeout
RIP: 0010:native_irq_enable arch/x86/include/asm/irqflags.h:42 [inline]
RIP: 0010:arch_local_irq_enable arch/x86/include/asm/irqflags.h:99 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:139 [inline]
RIP: 0010:lock_release+0x58a/0x8c0 kernel/locking/lockdep.c:5777
Code: 00 00 00 00 00 9c 8f 84 24 80 00 00 00 f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 2f 04 f8 75 70 f7 44 24 50 00 02 00 00 74 01 <fb> 48 c7 44 24 60 0e 36 e0 45 4b c7 04 2f 00 00 00 00 43 c7 44 2f
RSP: 0018:ffffc900001f07e0 EFLAGS: 00000006
RAX: 0000000000000001 RBX: 00c33c7b5423485e RCX: 2fa96662e0907a00
RDX: 0000000000000004 RSI: ffffffff8acadae0 RDI: ffffffff8b1c85a0
RBP: ffffc900001f08f0 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: ffff88802fdea980
R13: dffffc0000000000 R14: ffff88802fdea8d0 R15: 1ffff9200003e108
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f1d5bf010 CR3: 0000000061ee8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 mac80211_hwsim_addr_match+0x11f/0x190 drivers/net/wireless/virtual/mac80211_hwsim.c:1357
 mac80211_hwsim_tx_frame_no_nl+0xcca/0x11a0 drivers/net/wireless/virtual/mac80211_hwsim.c:1845
 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2176
 mac80211_hwsim_beacon_tx+0x3e9/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2269
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1750 [inline]
 __hrtimer_run_queues+0x520/0xc40 kernel/time/hrtimer.c:1814
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1831
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2008 [inline]
RIP: 0010:vprintk_emit+0x46f/0x610 kernel/printk/printk.c:2340
Code: 85 3f 01 00 00 e8 21 a7 1b 00 45 89 f7 48 85 db 48 8b 1c 24 75 07 e8 10 a7 1b 00 eb 06 e8 09 a7 1b 00 fb 48 c7 c7 80 63 12 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 99 b2
RSP: 0018:ffffc9000479f880 EFLAGS: 00000293
RAX: ffffffff816b7557 RBX: ffffffff816b73fb RCX: ffff88802fde9e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8d126380
RBP: ffffc9000479f970 R08: ffffffff911c15e7 R09: 1ffffffff22382bc
R10: dffffc0000000000 R11: fffffbfff22382bd R12: dffffc0000000000
R13: 1ffff920008f3f14 R14: 000000000000002a R15: 000000000000002a
 _printk+0xde/0x130 kernel/printk/printk.c:2366
 bt_err+0x122/0x180 net/bluetooth/lib.c:251
 hci_cmd_timeout+0xd8/0x1e0 net/bluetooth/hci_core.c:1465
 process_one_work kernel/workqueue.c:2653 [inline]
 process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
CPU: 0 PID: 6852 Comm: syz.6.216 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ip6_rcv_core+0xb5c/0x1740 net/ipv6/ip6_input.c:227
Code: e8 09 fc 4d f8 e9 e5 00 00 00 48 8b 6c 24 28 48 81 c5 c0 00 00 00 48 89 e8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 56 0a 00 00 <8b> 6d 00 89 ee 83 e6 08 31 ff e8 85 ff 4d f8 83 e5 08 0f 85 96 00
RSP: 0018:ffffc900000079f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888029f33640 RCX: 0000000000000100
RDX: ffff888023a7bc00 RSI: 0000000000000002 RDI: 0000000000000005
RBP: ffff888030c5e0c0 R08: ffff888029f3367f R09: 0000000000000000
R10: ffff888029f33668 R11: ffffed10053e66d0 R12: ffff88803001dd00
R13: dffffc0000000000 R14: ffff88807a4c3000 R15: 0000000000000002
FS:  00007fe926c556c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0cf356f10 CR3: 00000000616e9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ipv6_rcv+0x72/0xc0 net/ipv6/ip6_input.c:307
 __netif_receive_skb_one_core net/core/dev.c:5634 [inline]
 __netif_receive_skb+0xcc/0x290 net/core/dev.c:5748
 process_backlog+0x391/0x6f0 net/core/dev.c:6076
 __napi_poll+0xc0/0x460 net/core/dev.c:6638
 napi_poll net/core/dev.c:6705 [inline]
 net_rx_action+0x616/0xc40 net/core/dev.c:6841
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 51 2b cf f6 e8 7c 32 00 f7 fb bf 01 00 00 00 <e8> f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90003c37780 EFLAGS: 00000282
RAX: 369c605648439b00 RBX: 0000000000000000 RCX: 369c605648439b00
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: 0000000000000001
RBP: ffffc90003c37830 R08: ffffffff911c1507 R09: 1ffffffff22382a0
R10: dffffc0000000000 R11: fffffbfff22382a1 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000786ef0
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__sanitizer_cov_trace_pc+0x5c/0x60 kernel/kcov.c:234
Code: f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <c3> 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 f0 98 7c 7e 65 8b
RSP: 0018:ffffc90003c378f8 EFLAGS: 00000287
RAX: ffffffff81309312 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900115cb000 RSI: 0000000000003bff RDI: 0000000000003c00
RBP: ffffc90003c37a40 R08: 000000000000441f R09: 0000000000000006
R10: dffffc0000000000 R11: fffff52000786f32 R12: 0000000000000001
R13: 0000000000000005 R14: ffffffff9009ebca R15: ffffffff9009ebca
 text_poke arch/x86/kernel/alternative.c:2119 [inline]
 text_poke_bp_batch+0x4d2/0x990 arch/x86/kernel/alternative.c:2454
 text_poke_flush arch/x86/kernel/alternative.c:2623 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2630
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x123/0x240 kernel/jump_label.c:207
 static_key_enable+0x1a/0x20 kernel/jump_label.c:220
 tracepoint_add_func+0x907/0x990 kernel/tracepoint.c:361
 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline]
 tracepoint_probe_register+0x5e/0x90 kernel/tracepoint.c:531
 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline]
 perf_trace_event_init+0x4d2/0x9b0 kernel/trace/trace_event_perf.c:202
 perf_trace_init+0x238/0x2d0 kernel/trace/trace_event_perf.c:226
 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10204
 perf_try_init_event+0x12b/0x3c0 kernel/events/core.c:11818
 perf_init_event kernel/events/core.c:11888 [inline]
 perf_event_alloc+0xfa4/0x21b0 kernel/events/core.c:12169
 __do_sys_perf_event_open kernel/events/core.c:12676 [inline]
 __se_sys_perf_event_open+0x740/0x1c50 kernel/events/core.c:12567
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe925d9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe926c55028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe926015fa0 RCX: 00007fe925d9c799
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007fe925e32c99 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe926016038 R14: 00007fe926015fa0 R15: 00007fff18472db8
 </TASK>
icmp: detected local route for 10.128.0.197 during ICMP sending, src 10.128.0.163