rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=6d3c/1/0x4000000000000000 softirq=14065/14065 fqs=0
rcu: 	(t=10502 jiffies g=7837 q=167 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g7837 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=3549
rcu: rcu_preempt kthread starved for 10505 jiffies! g7837 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:26688 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1b88/0x5240 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x163/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 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: 5992 Comm: syz-executor271 Not tainted 6.15.0-rc2-syzkaller-00577-g8066e388be48 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x785/0xdc0 kernel/locking/qspinlock.c:325
Code: ff 42 0f b6 04 2b 84 c0 75 6c 66 c7 84 24 b0 00 00 00 00 01 48 8b 44 24 40 42 0f b6 04 28 84 c0 75 77 41 80 3e 00 74 0c f3 90 <41> ff c4 75 d2 e9 a0 00 00 00 4c 89 f7 be 02 00 00 00 e8 44 83 fd
RSP: 0018:ffffc9000417f820 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 1ffff9200082ff1a RCX: ffffc9000417f801
RDX: 0000000000000000 RSI: ffffffff8e646c74 RDI: ffffffff8ca1c5c0
RBP: ffffc9000417f958 R08: ffffffff905fdc77 R09: 1ffffffff20bfb8e
R10: dffffc0000000000 R11: fffffbfff20bfb8f R12: 00000000ffffa949
R13: dffffc0000000000 R14: ffff888030f61ec0 R15: ffffc9000417f8e0
FS:  00007f69714ce6c0(0000) GS:ffff888124fab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000007b852000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:572 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x276/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3701
 lock_sock include/net/sock.h:1651 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1545
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:727
 ____sys_sendmsg+0x523/0x860 net/socket.c:2566
 ___sys_sendmsg net/socket.c:2620 [inline]
 __sys_sendmsg+0x271/0x360 net/socket.c:2652
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69715153e9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69714ce218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000000002a RCX: 00007f69715153e9
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000004
RBP: 00007f697159f328 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000500
R13: 00007f697159f320 R14: 00007f697159f32c R15: 0000200000000004
 </TASK>
CPU: 1 UID: 0 PID: 5993 Comm: syz-executor271 Not tainted 6.15.0-rc2-syzkaller-00577-g8066e388be48 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x170/0x200 kernel/softirq.c:414
Code: 8c e8 04 d9 a8 0a 65 66 8b 05 94 78 e3 11 66 85 c0 75 60 bf 01 00 00 00 e8 fd 2a 0c 00 e8 88 d4 46 00 fb 65 8b 05 70 78 e3 11 <85> c0 75 05 e8 77 71 a6 ff 48 c7 44 24 20 0e 36 e0 45 4b c7 44 25
RSP: 0018:ffffc9000418e3a0 EFLAGS: 00000282
RAX: 0000000000000201 RBX: 1ffff92000831c7c RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffffffff8e646c74 RDI: ffffffff8ca1c5c0
RBP: ffffc9000418e450 R08: ffffffff905fdc77 R09: 1ffffffff20bfb8e
R10: dffffc0000000000 R11: fffffbfff20bfb8f R12: 1ffff92000831c78
R13: dffffc0000000000 R14: ffffc9000418e3e0 R15: 0000000000000201
FS:  00007f69714ad6c0(0000) GS:ffff8881250ab000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69714add58 CR3: 000000007b852000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:177 [inline]
 _raw_spin_trylock_bh+0x61/0x70 kernel/locking/spinlock.c:146
 spin_trylock_bh include/linux/spinlock.h:411 [inline]
 tipc_sk_rcv+0x459/0x1d10 net/tipc/socket.c:2494
 tipc_node_xmit+0x1d1/0xf00 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x311/0x450 net/tipc/node.c:1781
 tipc_sk_rcv+0x15e6/0x1d10 net/tipc/socket.c:2499
 tipc_node_xmit+0x1d1/0xf00 net/tipc/node.c:1701
 tipc_sk_push_backlog+0x513/0x930 net/tipc/socket.c:1312
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1366 [inline]
 tipc_sk_proto_rcv+0x9f5/0x19a0 net/tipc/socket.c:2156
 tipc_sk_filter_rcv+0x36d4/0x3970 net/tipc/socket.c:2350
 tipc_sk_enqueue net/tipc/socket.c:2443 [inline]
 tipc_sk_rcv+0x8b2/0x1d10 net/tipc/socket.c:2495
 tipc_node_xmit+0x1d1/0xf00 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x311/0x450 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x1a4/0x230 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1132 [inline]
 __release_sock+0x243/0x350 net/core/sock.c:3159
 release_sock+0x61/0x1f0 net/core/sock.c:3713
 sk_setsockopt+0xd10/0x3340 net/core/sock.c:-1
 do_sock_setsockopt+0x2fe/0x710 net/socket.c:2292
 __sys_setsockopt net/socket.c:2321 [inline]
 __do_sys_setsockopt net/socket.c:2327 [inline]
 __se_sys_setsockopt net/socket.c:2324 [inline]
 __x64_sys_setsockopt+0x187/0x210 net/socket.c:2324
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69715153e9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69714ad218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f69714ad6c0 RCX: 00007f69715153e9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f697159f338 R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000200000000500
R13: 00007f697159f330 R14: 00007f697159f33c R15: 0000200000000004
 </TASK>