rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (3 ticks this GP) idle=471/1/0x4000000000000002 softirq=38879/38879 fqs=0 
	(detected by 1, t=10504 jiffies, g=54129, q=309)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14247 Comm: syz.3.2143 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:rcu_lockdep_current_cpu_online+0x5e/0x130 kernel/rcu/tree.c:1171
Code: 08 89 c3 83 f8 08 0f 83 cd 00 00 00 49 bf 00 00 00 00 00 fc ff df 48 8d 1c dd 20 d8 e2 8b 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 88 73 59 00 48 8b 03 4c 8d b0 c0 b1 03 00 48 8d
RSP: 0018:ffffc90000007220 EFLAGS: 00000046
RAX: 1ffffffff17c5b04 RBX: ffffffff8be2d820 RCX: 8fd0c650c7f17b00
RDX: 0000000000000100 RSI: ffffffff8a79c960 RDI: ffffffff8a79c920
RBP: 0000000000000001 R08: ffffc900000073f7 R09: ffffc900000073c0
R10: dffffc0000000000 R11: fffff52000000e7f R12: dffffc0000000000
R13: ffffc90000007426 R14: ffffffff8c125d00 R15: dffffc0000000000
FS:  00007f000879a6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc18a260ff8 CR3: 000000007b7eb000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
 rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309
 perf_get_guest_cbs include/linux/perf_event.h:1274 [inline]
 perf_misc_flags+0x56/0x1b0 arch/x86/events/core.c:2961
 perf_prepare_sample+0x132/0x1cb0 kernel/events/core.c:7622
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 c2 22 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900000079c0 EFLAGS: 00000206
RAX: 8fd0c650c7f17b00 RBX: 1ffff92000000f3c RCX: 8fd0c650c7f17b00
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000007aa0 R08: ffffffff901cb1bf R09: 1ffffffff2039637
R10: dffffc0000000000 R11: fffffbfff2039638 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 hsr_announce+0x29a/0x310 net/hsr/hsr_device.c:410
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:_compound_head include/linux/page-flags.h:-1 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:356 [inline]
RIP: 0010:kfree+0x8d/0x2a0 mm/slub.c:4560
Code: ff 49 89 c7 49 c1 ef 06 49 83 e7 c0 48 b9 00 00 00 00 00 ea ff ff 49 8b 44 0f 08 a8 01 0f 85 21 01 00 00 49 01 cf 49 8b 47 08 <4c> 89 f9 a8 01 0f 85 1a 01 00 00 48 83 39 ff 49 8b 47 08 0f 84 d0
RSP: 0018:ffffc9000323eda0 EFLAGS: 00000286
RAX: dead000000000100 RBX: ffff88805f452400 RCX: ffffea0000000000
RDX: ffffc90015813000 RSI: 000000000000d146 RDI: 000000000000d147
RBP: ffffc9000323f450 R08: ffffc9000323ec4f R09: fffff52000647d6c
R10: dffffc0000000000 R11: fffff52000647d8a R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff87e6da6e R15: ffffea00017d1400
 rtnl_newlink+0xd4e/0x1920 net/core/rtnetlink.c:3579
 rtnetlink_rcv_msg+0x82c/0xf00 net/core/rtnetlink.c:5688
 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2512
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x78f/0x940 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1923
 sock_sendmsg_nosec net/socket.c:706 [inline]
 __sock_sendmsg net/socket.c:718 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2446
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2500
 __sys_sendmsg net/socket.c:2529 [inline]
 __do_sys_sendmsg net/socket.c:2538 [inline]
 __se_sys_sendmsg+0x1b7/0x2a0 net/socket.c:2536
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f000a540e59
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:00007f000879a028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f000a7b9fa0 RCX: 00007f000a540e59
RDX: 0000000000040000 RSI: 0000200000000940 RDI: 000000000000000e
RBP: 00007f000a5d6e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f000a7ba038 R14: 00007f000a7b9fa0 R15: 00007fffe2ad1c48
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10503 jiffies! g54129 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=36843
rcu: rcu_preempt kthread starved for 10504 jiffies! g54129 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27248 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11c3/0x4350 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
 rcu_gp_fqs_loop+0x2be/0x11f0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9a/0x370 kernel/rcu/tree.c:2145
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14247 Comm: syz.3.2143 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:trace_hardirqs_off_finish+0x3d/0x1f0 kernel/trace/trace_preemptirq.c:66
Code: ff 89 de e8 65 d9 f9 ff 85 db 74 0a e8 fc d5 f9 ff e9 a8 00 00 00 65 c7 05 44 16 84 7e 01 00 00 00 65 8b 1d 0d 53 83 7e 89 de <81> e6 00 00 f0 00 31 ff e8 36 d9 f9 ff 81 e3 00 00 f0 00 74 07 e8
RSP: 0018:ffffc900000078c8 EFLAGS: 00000046
RAX: ffffffff817f1c9b RBX: 0000000000000100 RCX: ffff88802619bb80
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f000879a6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc18a260ff8 CR3: 000000007b7eb000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 irqentry_enter+0x33/0x50 kernel/entry/common.c:384
 sysvec_irq_work+0xa/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 c2 22 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900000079c0 EFLAGS: 00000206
RAX: 8fd0c650c7f17b00 RBX: 1ffff92000000f3c RCX: 8fd0c650c7f17b00
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000007aa0 R08: ffffffff901cb1bf R09: 1ffffffff2039637
R10: dffffc0000000000 R11: fffffbfff2039638 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 hsr_announce+0x29a/0x310 net/hsr/hsr_device.c:410
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:_compound_head include/linux/page-flags.h:-1 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:356 [inline]
RIP: 0010:kfree+0x8d/0x2a0 mm/slub.c:4560
Code: ff 49 89 c7 49 c1 ef 06 49 83 e7 c0 48 b9 00 00 00 00 00 ea ff ff 49 8b 44 0f 08 a8 01 0f 85 21 01 00 00 49 01 cf 49 8b 47 08 <4c> 89 f9 a8 01 0f 85 1a 01 00 00 48 83 39 ff 49 8b 47 08 0f 84 d0
RSP: 0018:ffffc9000323eda0 EFLAGS: 00000286
RAX: dead000000000100 RBX: ffff88805f452400 RCX: ffffea0000000000
RDX: ffffc90015813000 RSI: 000000000000d146 RDI: 000000000000d147
RBP: ffffc9000323f450 R08: ffffc9000323ec4f R09: fffff52000647d6c
R10: dffffc0000000000 R11: fffff52000647d8a R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff87e6da6e R15: ffffea00017d1400
 rtnl_newlink+0xd4e/0x1920 net/core/rtnetlink.c:3579
 rtnetlink_rcv_msg+0x82c/0xf00 net/core/rtnetlink.c:5688
 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2512
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x78f/0x940 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1923
 sock_sendmsg_nosec net/socket.c:706 [inline]
 __sock_sendmsg net/socket.c:718 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2446
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2500
 __sys_sendmsg net/socket.c:2529 [inline]
 __do_sys_sendmsg net/socket.c:2538 [inline]
 __se_sys_sendmsg+0x1b7/0x2a0 net/socket.c:2536
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f000a540e59
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:00007f000879a028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f000a7b9fa0 RCX: 00007f000a540e59
RDX: 0000000000040000 RSI: 0000200000000940 RDI: 000000000000000e
RBP: 00007f000a5d6e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f000a7ba038 R14: 00007f000a7b9fa0 R15: 00007fffe2ad1c48
 </TASK>