syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2655 jiffies s: 449 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4476 Comm: syz-executor390 Not tainted 6.1.126-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0xea/0x7a0 kernel/locking/lockdep.c:4296
Code: 03 0f b6 04 10 84 c0 0f 85 42 05 00 00 83 3d cc e7 ca 15 00 0f 85 a8 00 00 00 4c 8d 74 24 40 4c 89 f3 48 c1 eb 03 80 3c 13 00 <74> 12 4c 89 f7 e8 9c c5 77 00 48 ba 00 00 00 00 00 fc ff df 48 c7
RSP: 0018:ffffc900044ee320 EFLAGS: 00000046
RAX: 0000000000000004 RBX: 1ffff9200089dc6c RCX: ffffffff97355103
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff81544544
RBP: ffffc900044ee3c8 R08: dffffc0000000000 R09: ffffed100f279cbc
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200089dc84 R14: ffffc900044ee360 R15: 1ffff9200089dc68
FS:  00007f8a6e1cc6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a6e1ccd58 CR3: 000000001dfc7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 __local_bh_enable_ip+0x164/0x1f0 kernel/softirq.c:401
 __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:177 [inline]
 _raw_spin_trylock_bh+0x5d/0x70 kernel/locking/spinlock.c:146
 spin_trylock_bh include/linux/spinlock.h:411 [inline]
 tipc_sk_rcv+0x46c/0x1da0 net/tipc/socket.c:2496
 tipc_node_xmit+0x1da/0xf50 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x309/0x440 net/tipc/node.c:1783
 tipc_sk_rcv+0x166b/0x1da0 net/tipc/socket.c:2501
 tipc_node_xmit+0x1da/0xf50 net/tipc/node.c:1703
 tipc_sk_push_backlog+0x507/0x920 net/tipc/socket.c:1316
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1370 [inline]
 tipc_sk_proto_rcv+0xa72/0x19a0 net/tipc/socket.c:2158
 tipc_sk_filter_rcv+0x31dd/0x34b0 net/tipc/socket.c:2352
 tipc_sk_enqueue net/tipc/socket.c:2445 [inline]
 tipc_sk_rcv+0x8bf/0x1da0 net/tipc/socket.c:2497
 tipc_node_xmit+0x1da/0xf50 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x309/0x440 net/tipc/node.c:1783
 tipc_sk_backlog_rcv+0x199/0x220 net/tipc/socket.c:2412
 sk_backlog_rcv include/net/sock.h:1119 [inline]
 __release_sock+0x198/0x4b0 net/core/sock.c:2939
 release_sock+0x5d/0x1c0 net/core/sock.c:3503
 sk_setsockopt+0x2310/0x3490
 __sys_setsockopt+0x5dd/0xa00 net/socket.c:2284
 __do_sys_setsockopt net/socket.c:2299 [inline]
 __se_sys_setsockopt net/socket.c:2296 [inline]
 __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2296
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8a6e22c3e9
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:00007f8a6e1cc228 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f8a6e1cc6c0 RCX: 00007f8a6e22c3e9
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f8a6e2b6338 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000020000540 R11: 0000000000000246 R12: 00007f8a6e2b6330
R13: 00007f8a6e2b633c R14: 00007fffea375ee0 R15: 00007fffea375fc8
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.887 msecs