rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=d5b4/1/0x4000000000000000 softirq=22861/22861 fqs=0
rcu: 	(t=10500 jiffies g=14317 q=95 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g14317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=7067
rcu: rcu_preempt kthread starved for 10500 jiffies! g14317 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:28824 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6591 Comm: syz.0.45 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: d7 6c 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 e3 84 29 00 fb f4 <e9> 3c 0a 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc900031478c8 EFLAGS: 000002d3
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: ffff888034112480 RSI: ffffffff816b1f31 RDI: ffffffff8bf07040
RBP: ffff8880363d2608 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90820dd7 R11: 0000000000000001 R12: 0000000000000003
R13: 0000000000000003 R14: ffff8880b843b2c0 R15: ffffed1006c7a4c1
FS:  00007ff16239c6c0(0000) GS:ffff888124a08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555618ed808 CR3: 000000005a448000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 kvm_wait arch/x86/kernel/kvm.c:1080 [inline]
 kvm_wait+0x186/0x1f0 arch/x86/kernel/kvm.c:1062
 pv_wait arch/x86/include/asm/paravirt.h:569 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x4e1/0xcf0 kernel/locking/qspinlock.c:325
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x20e/0x2b0 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x5f/0xf0 net/core/sock.c:3723
 lock_sock include/net/sock.h:1679 [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+0xa98/0xc70 net/socket.c:2630
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2684
 __sys_sendmsg+0x16d/0x220 net/socket.c:2716
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff16158e929
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:00007ff16239c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff1617b5fa0 RCX: 00007ff16158e929
RDX: 0000000000000000 RSI: 0000200000000780 RDI: 0000000000000004
RBP: 00007ff161610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff1617b5fa0 R15: 00007ffebb407af8
 </TASK>
CPU: 1 UID: 0 PID: 6592 Comm: syz.0.45 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock+0x12c/0x2b0 kernel/locking/spinlock_debug.c:116
Code: 0f 84 34 01 00 00 48 89 df be 04 00 00 00 c7 44 24 28 00 00 00 00 e8 63 7c 8c 00 be 04 00 00 00 48 8d 7c 24 28 e8 54 7c 8c 00 <8b> 44 24 28 ba 01 00 00 00 89 44 24 04 f0 0f b1 13 0f 85 94 00 00
RSP: 0018:ffffc900030a6c08 EFLAGS: 00000297
RAX: 0000000000000001 RBX: ffffc900030a7048 RCX: ffffffff8199137c
RDX: fffff52000614d86 RSI: 0000000000000004 RDI: ffffc900030a6c30
RBP: 1ffff92000614d82 R08: 0000000000000001 R09: fffff52000614d86
R10: 0000000000000003 R11: 0000000000000001 R12: ffffc900030a7050
R13: ffffc900030a7058 R14: ffff8880363d2440 R15: 00000000219d0283
FS:  00007ff16237b6c0(0000) GS:ffff888124b08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff16237af98 CR3: 000000005a448000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1225 [inline]
 tipc_sk_rcv+0x166/0x1c40 net/tipc/socket.c:2489
 tipc_node_xmit+0x232/0xfc0 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+0x9d7/0x1c40 net/tipc/socket.c:2499
 tipc_node_xmit+0x232/0xfc0 net/tipc/node.c:1701
 tipc_sk_push_backlog+0x318/0x9e0 net/tipc/socket.c:1312
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1366 [inline]
 tipc_sk_proto_rcv net/tipc/socket.c:2156 [inline]
 tipc_sk_filter_rcv+0x261f/0x30b0 net/tipc/socket.c:2350
 tipc_sk_enqueue net/tipc/socket.c:2443 [inline]
 tipc_sk_rcv+0xfb4/0x1c40 net/tipc/socket.c:2495
 tipc_node_xmit+0x232/0xfc0 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:1158 [inline]
 __release_sock+0x3a9/0x450 net/core/sock.c:3180
 release_sock+0x5a/0x220 net/core/sock.c:3735
 sockopt_release_sock net/core/sock.c:1155 [inline]
 sk_setsockopt+0x58c/0x3ac0 net/core/sock.c:1668
 do_sock_setsockopt+0x193/0x1d0 net/socket.c:2356
 __sys_setsockopt+0x1a0/0x230 net/socket.c:2385
 __do_sys_setsockopt net/socket.c:2391 [inline]
 __se_sys_setsockopt net/socket.c:2388 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2388
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff16158e929
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:00007ff16237b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ff1617b6080 RCX: 00007ff16158e929
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007ff161610b39 R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ff1617b6080 R15: 00007ffebb407af8
 </TASK>