rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=7bb4/1/0x4000000000000000 softirq=13406/13406 fqs=0
rcu: 	(t=10502 jiffies g=12361 q=87 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g12361 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=2276
rcu: rcu_preempt kthread starved for 10505 jiffies! g12361 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:27688 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1840/0x57a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7283
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 6660 Comm: syz-executor288 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 4b 81 02 c3 cc cc cc cc cc cc cc 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 83 22 24 00 fb f4 <e9> 7c ff 02 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900040bf768 EFLAGS: 000002d3
RAX: ffffffff8175d45a RBX: 0000000000000003 RCX: ffff88807b6f9f00
RDX: 0000000000000000 RSI: ffffffff8dfac7be RDI: ffffffff8c288620
RBP: 0000000000000003 R08: ffffffff90300bf7 R09: 1ffffffff206017e
R10: dffffc0000000000 R11: fffffbfff206017f R12: 0000000000000200
R13: 0000000000000000 R14: ffff88807bebd8d0 R15: dffffc0000000000
FS:  00007fe4493d06c0(0000) GS:ffff88812529d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003280 CR3: 000000002bda8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
 kvm_wait+0x10f/0x150 arch/x86/kernel/kvm.c:1095
 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+0x74a/0xbc0 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+0x26c/0x2f0 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:348 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3844
 lock_sock include/net/sock.h:1713 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1546
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2699
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2753
 __sys_sendmsg net/socket.c:2785 [inline]
 __do_sys_sendmsg net/socket.c:2790 [inline]
 __se_sys_sendmsg net/socket.c:2788 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2788
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe4493f8029
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:00007fe4493d01d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000000000e RCX: 00007fe4493f8029
RDX: 0000000000000000 RSI: 0000200000003280 RDI: 0000000000000004
RBP: 00007fe4494a8b48 R08: 36203a6b63617473 R09: 36203a6b63617473
R10: 36203a6b63617473 R11: 0000000000000246 R12: 0000200000003280
R13: 00007fe4494a8b40 R14: 00007fe4494a8b4c R15: 0000200000000004
 </TASK>
CPU: 1 UID: 0 PID: 6661 Comm: syz-executor288 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lock_release+0x2d7/0x3c0 kernel/locking/lockdep.c:5893
Code: ff 96 11 00 00 00 00 eb b5 e8 35 cf 03 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 35 ba 96 11 48 3b 44 24 28 75 44 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 9a ca 06 0a cc 48 8d 3d 32 23 92
RSP: 0018:ffffc9000409e498 EFLAGS: 00000282
RAX: 705cb5bbc34c0500 RBX: 0000000000000202 RCX: 0000000000000201
RDX: 0000000000000002 RSI: ffffffff8e2206c4 RDI: ffffffff8c288620
RBP: ffff88807b6f8be0 R08: ffffffff8b44289e R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e95c780 R12: 0000000000000002
R13: 0000000000000002 R14: ffffffff8e95c780 R15: ffff88807b6f8000
FS:  00007fe4493af6c0(0000) GS:ffff88812539d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe4493aeff8 CR3: 000000002bda8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rcu_lock_release include/linux/rcupdate.h:310 [inline]
 rcu_read_unlock include/linux/rcupdate.h:869 [inline]
 net_generic+0x1ef/0x240 include/net/netns/generic.h:48
 tipc_sk_lookup+0xa6/0x920 net/tipc/socket.c:2997
 tipc_sk_rcv+0x3f8/0x2b50 net/tipc/socket.c:2493
 tipc_node_xmit+0x205/0xf10 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x2cd/0x400 net/tipc/node.c:1781
 tipc_sk_rcv+0x2539/0x2b50 net/tipc/socket.c:2502
 tipc_node_xmit+0x205/0xf10 net/tipc/node.c:1701
 tipc_sk_push_backlog net/tipc/socket.c:1313 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2256 [inline]
 tipc_sk_filter_rcv+0x17ee/0x3210 net/tipc/socket.c:2365
 tipc_sk_enqueue net/tipc/socket.c:2446 [inline]
 tipc_sk_rcv+0x877/0x2b50 net/tipc/socket.c:2498
 tipc_node_xmit+0x205/0xf10 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x2cd/0x400 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x1ad/0x270 net/tipc/socket.c:2413
 sk_backlog_rcv include/net/sock.h:1190 [inline]
 __release_sock+0x28b/0x390 net/core/sock.c:3258
 release_sock+0x190/0x260 net/core/sock.c:3857
 sockopt_release_sock net/core/sock.c:1163 [inline]
 sk_setsockopt+0x287d/0x2f10 net/core/sock.c:1681
 do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2378
 __sys_setsockopt net/socket.c:2407 [inline]
 __do_sys_setsockopt net/socket.c:2413 [inline]
 __se_sys_setsockopt net/socket.c:2410 [inline]
 __x64_sys_setsockopt+0x13d/0x1b0 net/socket.c:2410
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe4493f8029
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:00007fe4493af1d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fe4493afcdc RCX: 00007fe4493f8029
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fe4494a8b58 R08: 0000000000000004 R09: 36203a6b63617473
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000200000003280
R13: 00007fe4494a8b50 R14: 00007fe4494a8b5c R15: 0000200000000004
 </TASK>