rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=c3ac/1/0x4000000000000000 softirq=11052/11052 fqs=0
rcu: 	(t=10500 jiffies g=9493 q=69 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g9493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4403
rcu: rcu_preempt kthread starved for 10500 jiffies! g9493 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:27848 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 schedule+0xbd/0x170 kernel/sched/core.c:6775
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 7385 Comm: syz-executor192 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 02 e4 3c 09 65 66 8b 05 7a eb b0 7e 66 85 c0 75 54 bf 01 00 00 00 e8 2b 1d 0a 00 e8 e6 16 3b 00 fb 65 8b 05 46 eb b0 7e <85> c0 75 05 e8 35 d0 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc900047863e0 EFLAGS: 00000282
RAX: 0000000000000201 RBX: 0000000000000201 RCX: 09648db2af578f00
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d3360
RBP: ffffc90004786470 R08: ffffffff911ef5cf R09: 1ffffffff223deb9
R10: dffffc0000000000 R11: fffffbfff223deba R12: ffffffff8a2aa759
R13: ffffc900047869e0 R14: dffffc0000000000 R15: 1ffff920008f0c7c
FS:  00007f685f5a06c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f685f59fbb0 CR3: 000000007ab16000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1235 [inline]
 tipc_sk_rcv+0x3e9/0x2ae0 net/tipc/socket.c:2500
 tipc_node_xmit+0x22f/0x1040 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2cb/0x3f0 net/tipc/node.c:1788
 tipc_sk_rcv+0x2562/0x2ae0 net/tipc/socket.c:2510
 tipc_node_xmit+0x22f/0x1040 net/tipc/node.c:1708
 tipc_sk_push_backlog+0x4f1/0x920 net/tipc/socket.c:1318
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1375 [inline]
 tipc_sk_proto_rcv+0xae3/0x17d0 net/tipc/socket.c:2165
 tipc_sk_filter_rcv+0x2e6a/0x3090 net/tipc/socket.c:2361
 tipc_sk_enqueue net/tipc/socket.c:2454 [inline]
 tipc_sk_rcv+0x8c5/0x2ae0 net/tipc/socket.c:2506
 tipc_node_xmit+0x22f/0x1040 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2cb/0x3f0 net/tipc/node.c:1788
 tipc_sk_backlog_rcv+0x1ae/0x270 net/tipc/socket.c:2421
 sk_backlog_rcv include/net/sock.h:1142 [inline]
 __release_sock+0x1ea/0x460 net/core/sock.c:3019
 release_sock+0x5f/0x1c0 net/core/sock.c:3558
 sockopt_release_sock net/core/sock.c:1075 [inline]
 sk_setsockopt+0x25fa/0x2b20 net/core/sock.c:1561
 do_sock_setsockopt+0x11b/0x1a0 net/socket.c:2318
 __sys_setsockopt net/socket.c:2345 [inline]
 __do_sys_setsockopt net/socket.c:2354 [inline]
 __se_sys_setsockopt net/socket.c:2351 [inline]
 __x64_sys_setsockopt+0x182/0x200 net/socket.c:2351
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f685f5e1029
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:00007f685f5a0218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f685f5a0cdc RCX: 00007f685f5e1029
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f685f691b58 R08: 0000000000000004 R09: 37203a6b63617473
R10: 00002000000001c0 R11: 0000000000000246 R12: 00002000000004c0
R13: 00007f685f691b50 R14: 00007f685f691b5c R15: 0000200000000104
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7384 Comm: syz-executor192 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pv_native_safe_halt+0xf/0x10 arch/x86/kernel/paravirt.c:148
Code: d9 19 02 c3 cc cc cc cc cc cc cc f3 0f 1e fa 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 66 90 0f 00 2d a3 a5 38 00 fb f4 <c3> 66 0f 1f 00 55 41 57 41 56 41 54 53 50 8b 2f eb 2c 89 cb 80 f9
RSP: 0018:ffffc90004777718 EFLAGS: 000002d3
RAX: ffffffff813b1538 RBX: 0000000000000003 RCX: ffff88803043da00
RDX: 0000000000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d3360
RBP: ffffc900047777f0 R08: ffffffff911ef5cf R09: 1ffffffff223deb9
R10: dffffc0000000000 R11: fffffbfff223deba R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000003 R15: 1ffff920008eeee8
FS:  00007f685f5c16c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000100 CR3: 000000007ab16000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline]
 kvm_wait+0x23d/0x2a0 arch/x86/kernel/kvm.c:1058
 pv_wait arch/x86/include/asm/paravirt.h:598 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x613/0x9c0 kernel/locking/qspinlock.c:511
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [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+0x23e/0x2b0 kernel/locking/spinlock_debug.c:115
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3546
 lock_sock include/net/sock.h:1780 [inline]
 tipc_sendstream+0x47/0x70 net/tipc/socket.c:1554
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x61b/0x980 net/socket.c:2595
 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2649
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2687 [inline]
 __se_sys_sendmsg+0x1d0/0x2c0 net/socket.c:2685
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f685f5e1029
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:00007f685f5c1218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000000002b RCX: 00007f685f5e1029
RDX: 0000000000000941 RSI: 00002000000004c0 RDI: 0000000000000004
RBP: 00007f685f691b48 R08: 37203a6b63617473 R09: 37203a6b63617473
R10: 37203a6b63617473 R11: 0000000000000246 R12: 00002000000004c0
R13: 00007f685f691b40 R14: 00007f685f691b4c R15: 0000200000000104
 </TASK>
CPU: 1 PID: 7385 Comm: syz-executor192 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 02 e4 3c 09 65 66 8b 05 7a eb b0 7e 66 85 c0 75 54 bf 01 00 00 00 e8 2b 1d 0a 00 e8 e6 16 3b 00 fb 65 8b 05 46 eb b0 7e <85> c0 75 05 e8 35 d0 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc900047863e0 EFLAGS: 00000282
RAX: 0000000000000201 RBX: 0000000000000201 RCX: 09648db2af578f00
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1d3360
RBP: ffffc90004786470 R08: ffffffff911ef5cf R09: 1ffffffff223deb9
R10: dffffc0000000000 R11: fffffbfff223deba R12: ffffffff8a2aa759
R13: ffffc900047869e0 R14: dffffc0000000000 R15: 1ffff920008f0c7c
FS:  00007f685f5a06c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f685f59fbb0 CR3: 000000007ab16000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1235 [inline]
 tipc_sk_rcv+0x3e9/0x2ae0 net/tipc/socket.c:2500
 tipc_node_xmit+0x22f/0x1040 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2cb/0x3f0 net/tipc/node.c:1788
 tipc_sk_rcv+0x2562/0x2ae0 net/tipc/socket.c:2510
 tipc_node_xmit+0x22f/0x1040 net/tipc/node.c:1708
 tipc_sk_push_backlog+0x4f1/0x920 net/tipc/socket.c:1318
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1375 [inline]
 tipc_sk_proto_rcv+0xae3/0x17d0 net/tipc/socket.c:2165
 tipc_sk_filter_rcv+0x2e6a/0x3090 net/tipc/socket.c:2361
 tipc_sk_enqueue net/tipc/socket.c:2454 [inline]
 tipc_sk_rcv+0x8c5/0x2ae0 net/tipc/socket.c:2506
 tipc_node_xmit+0x22f/0x1040 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2cb/0x3f0 net/tipc/node.c:1788
 tipc_sk_backlog_rcv+0x1ae/0x270 net/tipc/socket.c:2421
 sk_backlog_rcv include/net/sock.h:1142 [inline]
 __release_sock+0x1ea/0x460 net/core/sock.c:3019
 release_sock+0x5f/0x1c0 net/core/sock.c:3558
 sockopt_release_sock net/core/sock.c:1075 [inline]
 sk_setsockopt+0x25fa/0x2b20 net/core/sock.c:1561
 do_sock_setsockopt+0x11b/0x1a0 net/socket.c:2318
 __sys_setsockopt net/socket.c:2345 [inline]
 __do_sys_setsockopt net/socket.c:2354 [inline]
 __se_sys_setsockopt net/socket.c:2351 [inline]
 __x64_sys_setsockopt+0x182/0x200 net/socket.c:2351
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f685f5e1029
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:00007f685f5a0218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f685f5a0cdc RCX: 00007f685f5e1029
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f685f691b58 R08: 0000000000000004 R09: 37203a6b63617473
R10: 00002000000001c0 R11: 0000000000000246 R12: 00002000000004c0
R13: 00007f685f691b50 R14: 00007f685f691b5c R15: 0000200000000104
 </TASK>