rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=fe24/1/0x4000000000000000 softirq=12241/12241 fqs=0
rcu: 	(t=10500 jiffies g=7893 q=51 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g7893 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3007
rcu: rcu_preempt kthread starved for 10500 jiffies! g7893 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27976 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0xfee/0x6120 kernel/sched/core.c:6908
 __schedule_loop kernel/sched/core.c:6990 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7005
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 5857 Comm: syz-executor276 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
RIP: 0010:check_preemption_disabled+0x26/0xe0 lib/smp_processor_id.c:54
Code: 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 35 0c 7e 08 65 f7 05 26 0c 7e 08 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d 41 5c <e9> c5 17 03 00 9c 58 f6 c4 02 74 ea 65 4c 8b 25 ee 0b 7e 08 48 89
RSP: 0018:ffffc90003a86c40 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8210bce1
RDX: 0000000000000001 RSI: ffffffff8c1afb20 RDI: ffffffff8c1afb60
RBP: ffffffff81c90697 R08: 0000000000000000 R09: fffffbfff21b3062
R10: ffffffff90d98317 R11: 0000000000000000 R12: ffffc90003a87030
R13: 0000000000000001 R14: 00000000ed5fa9f8 R15: dffffc0000000000
FS:  00007f278b94f6c0(0000) GS:ffff888124445000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f278b94eff8 CR3: 0000000043cdd000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752
 trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off_finish kernel/trace/trace_preemptirq.c:95 [inline]
 trace_hardirqs_off+0x70/0x190 kernel/trace/trace_preemptirq.c:90
 __local_bh_enable_ip+0xc7/0x120 kernel/softirq.c:432
 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:207 [inline]
 _raw_spin_trylock_bh+0x35/0x70 kernel/locking/spinlock.c:146
 spin_trylock_bh include/linux/spinlock.h:413 [inline]
 tipc_sk_rcv+0x318/0x1ca0 net/tipc/socket.c:2494
 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781
 tipc_sk_rcv+0xaab/0x1ca0 net/tipc/socket.c:2499
 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701
 tipc_sk_push_backlog+0x318/0xa00 net/tipc/socket.c:1312
 tipc_sk_filter_connect net/tipc/socket.c:2253 [inline]
 tipc_sk_filter_rcv+0x960/0x3240 net/tipc/socket.c:2362
 tipc_sk_enqueue net/tipc/socket.c:2443 [inline]
 tipc_sk_rcv+0xebb/0x1ca0 net/tipc/socket.c:2495
 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x16f/0x1e0 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1185 [inline]
 __release_sock+0x3a2/0x440 net/core/sock.c:3213
 release_sock+0x5a/0x220 net/core/sock.c:3795
 sockopt_release_sock net/core/sock.c:1161 [inline]
 sk_setsockopt+0x467/0x5230 net/core/sock.c:1674
 do_sock_setsockopt+0x193/0x1d0 net/socket.c:2318
 __sys_setsockopt+0x195/0x220 net/socket.c:2347
 __do_sys_setsockopt net/socket.c:2353 [inline]
 __se_sys_setsockopt net/socket.c:2350 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2350
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f278b998029
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f278b94f1d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f278b94fcdc RCX: 00007f278b998029
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f278ba48b58 R08: 0000000000000004 R09: 35203a6b63617473
R10: 0000200000000540 R11: 0000000000000246 R12: 0000200000000500
R13: 00007f278ba48b50 R14: 00007f278ba48b5c R15: 0000200000000004
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.437 msecs
CPU: 0 UID: 0 PID: 5856 Comm: syz-executor276 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: e8 82 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 03 f1 1b 00 fb f4 <e9> fc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc900030078b8 EFLAGS: 00000246
RAX: 000000000000a7b2 RBX: 0000000000000003 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffffffff8de74d20 RDI: ffffffff8c1afba0
RBP: ffff8880236bca48 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000003 R14: ffff8880b843c080 R15: 0000000000000000
FS:  00007f278b9706c0(0000) GS:ffff888124345000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f278b94fd58 CR3: 0000000043cdd000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline]
 kvm_wait arch/x86/kernel/kvm.c:1101 [inline]
 kvm_wait+0x124/0x160 arch/x86/kernel/kvm.c:1083
 pv_wait arch/x86/include/asm/paravirt-spinlock.h:83 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x4b0/0xc00 kernel/locking/qspinlock.c:325
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x1e0/0x260 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:347 [inline]
 lock_sock_nested+0x5f/0xf0 net/core/sock.c:3783
 lock_sock include/net/sock.h:1709 [inline]
 tipc_sendstream+0x41/0x70 net/tipc/socket.c:1545
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2592
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2646
 __sys_sendmsg+0x170/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f278b998029
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f278b9701d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f278b998029
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000004
RBP: 00007f278ba48b48 R08: 35203a6b63617473 R09: 35203a6b63617473
R10: 35203a6b63617473 R11: 0000000000000246 R12: 0000200000000500
R13: 00007f278ba48b40 R14: 00007f278ba48b4c R15: 0000200000000004
 </TASK>