rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=c71c/1/0x4000000000000000 softirq=12499/12507 fqs=5237 rcu: hardirqs softirqs csw/system rcu: number: 5261 0 0 rcu: cputime: 217 0 52204 ==> 52490(ms) rcu: (t=10500 jiffies g=10229 q=203 ncpus=2) CPU: 0 UID: 0 PID: 5928 Comm: syz-executor930 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline] RIP: 0010:lock_acquire+0xab/0x2e0 kernel/locking/lockdep.c:5864 Code: 84 c1 00 00 00 65 8b 05 c3 69 7b 11 85 c0 0f 85 b2 00 00 00 65 48 8b 05 0b 24 7b 11 83 b8 54 0b 00 00 00 0f 85 9d 00 00 00 9c <5b> fa 48 c7 c7 86 47 f4 8d e8 a7 a1 0f 0a 65 ff 05 90 69 7b 11 45 RSP: 0018:ffffc90003c66548 EFLAGS: 00000246 RAX: ffff88804d7e0000 RBX: ffffc90003c66b58 RCX: 0000000000000403 RDX: 0000000000000000 RSI: ffffffff8bb3af46 RDI: 1ffff9200078cd6e RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1004e4eaf1 R12: 0000000000000000 R13: ffffc90003c66b70 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f3f2abe76c0(0000) GS:ffff888125455000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3f2abe6ff8 CR3: 000000007c768000 CR4: 00000000003526f0 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:347 [inline] tipc_skb_peek_port net/tipc/msg.h:1225 [inline] tipc_sk_rcv+0x27b/0x2b70 net/tipc/socket.c:2491 tipc_node_xmit+0x202/0xf10 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2d8/0x400 net/tipc/node.c:1781 tipc_sk_rcv+0x2561/0x2b70 net/tipc/socket.c:2501 tipc_node_xmit+0x202/0xf10 net/tipc/node.c:1701 tipc_sk_push_backlog net/tipc/socket.c:1312 [inline] tipc_sk_filter_connect net/tipc/socket.c:2255 [inline] tipc_sk_filter_rcv+0x1d4c/0x33d0 net/tipc/socket.c:2364 tipc_sk_enqueue net/tipc/socket.c:2445 [inline] tipc_sk_rcv+0x88e/0x2b70 net/tipc/socket.c:2497 tipc_node_xmit+0x202/0xf10 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2d8/0x400 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x1bb/0x270 net/tipc/socket.c:2412 sk_backlog_rcv include/net/sock.h:1190 [inline] __release_sock+0x297/0x3a0 net/core/sock.c:3213 release_sock+0x190/0x260 net/core/sock.c:3812 sockopt_release_sock net/core/sock.c:1161 [inline] sk_setsockopt+0x28af/0x2e80 net/core/sock.c:1674 do_sock_setsockopt+0x11b/0x1b0 net/socket.c:2311 __sys_setsockopt net/socket.c:2340 [inline] __do_sys_setsockopt net/socket.c:2346 [inline] __se_sys_setsockopt net/socket.c:2343 [inline] __x64_sys_setsockopt+0x13d/0x1b0 net/socket.c:2343 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3f2ac30029 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:00007f3f2abe71d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f3f2abe7cdc RCX: 00007f3f2ac30029 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f3f2ace0b58 R08: 0000000000000004 R09: 35203a6b63617473 R10: 0000200000000540 R11: 0000000000000246 R12: 00002000000002c0 R13: 00007f3f2ace0b50 R14: 00007f3f2ace0b5c R15: 0000200000000004