rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=8a04/1/0x4000000000000000 softirq=16643/16657 fqs=5249 rcu: hardirqs softirqs csw/system rcu: number: 1 0 0 rcu: cputime: 129 0 52355 ==> 52500(ms) rcu: (t=10502 jiffies g=11681 q=628 ncpus=2) CPU: 0 UID: 0 PID: 8142 Comm: syz-executor112 Not tainted 6.15.0-rc6-syzkaller-00167-gc46286fdd6aa #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 6b 4f d7 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000ad3e220 EFLAGS: 00000206 RAX: bc50aed9a003fe00 RBX: 0000000000000000 RCX: bc50aed9a003fe00 RDX: 0000000000000000 RSI: ffffffff8d937446 RDI: ffffffff8bc1d9a0 RBP: ffffffff8af6d188 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8af6d188 R12: 0000000000000002 R13: ffffffff8df3dce0 R14: 0000000000000000 R15: 0000000000000246 FS: 00007ff1b4adb6c0(0000) GS:ffff8881260c7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff1b4b99a78 CR3: 000000003121e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] tipc_sk_lookup+0xd9/0x920 net/tipc/socket.c:2997 tipc_sk_rcv+0x3f9/0x2ba0 net/tipc/socket.c:2490 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2a0/0x3b0 net/tipc/node.c:1781 tipc_sk_rcv+0x2636/0x2ba0 net/tipc/socket.c:2499 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701 tipc_sk_push_backlog+0x4ef/0x900 net/tipc/socket.c:1312 tipc_sk_conn_proto_rcv net/tipc/socket.c:1366 [inline] tipc_sk_proto_rcv+0x8c3/0x1730 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x2e7b/0x30b0 net/tipc/socket.c:2350 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x8a5/0x2ba0 net/tipc/socket.c:2495 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2a0/0x3b0 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x1a1/0x230 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1132 [inline] __release_sock+0x249/0x350 net/core/sock.c:3163 release_sock+0x5f/0x1f0 net/core/sock.c:3717 sockopt_release_sock net/core/sock.c:1157 [inline] sk_setsockopt+0x2477/0x2940 net/core/sock.c:1654 do_sock_setsockopt+0x201/0x3e0 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+0x18b/0x220 net/socket.c:2324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff1b4b433e9 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:00007ff1b4adb218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ff1b4adb6c0 RCX: 00007ff1b4b433e9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007ff1b4bcd338 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000200000000500 R13: 00007ff1b4bcd330 R14: 00007ff1b4bcd33c R15: 0000200000000004