rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10638 ticks this GP) idle=bbac/1/0x4000000000000000 softirq=15000/15002 fqs=5229 rcu: hardirqs softirqs csw/system rcu: number: 5271 0 0 rcu: cputime: 204 0 52124 ==> 52480(ms) rcu: (t=10500 jiffies g=10137 q=254 ncpus=2) CPU: 1 UID: 0 PID: 5869 Comm: syz-executor172 Not tainted 6.15.0-next-20250529-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 b2 08 f5 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc900045de280 EFLAGS: 00000206 RAX: b5b7ecad89584000 RBX: 1ffff920008bbc58 RCX: b5b7ecad89584000 RDX: 0000000000000002 RSI: ffffffff8d982956 RDI: ffffffff8be29880 RBP: ffffc900045de370 R08: ffffffff8fa137f7 R09: 1ffffffff1f426fe R10: dffffc0000000000 R11: fffffbfff1f426ff R12: ffffffff8e144400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002 FS: 00007f2795d4e6c0(0000) GS:ffff888125d52000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000001f000 CR3: 000000002fc72000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] net_generic+0x1f4/0x240 include/net/netns/generic.h:48 tipc_sk_lookup+0xa9/0x920 net/tipc/socket.c:2994 tipc_sk_rcv+0x3f9/0x2ba0 net/tipc/socket.c:2490 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701 tipc_node_xmit_skb+0xf4/0x150 net/tipc/node.c:1766 tipc_sk_rcv+0x29c4/0x2ba0 net/tipc/socket.c:2520 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701 tipc_sk_push_backlog net/tipc/socket.c:1312 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x12a0/0x30b0 net/tipc/socket.c:2362 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:1148 [inline] __release_sock+0x249/0x350 net/core/sock.c:3213 release_sock+0x5f/0x1f0 net/core/sock.c:3767 tipc_release+0x16e2/0x2160 net/tipc/socket.c:650 __sock_release net/socket.c:647 [inline] sock_close+0xc0/0x240 net/socket.c:1391 __fput+0x44c/0xa70 fs/file_table.c:467 task_work_run+0x1d4/0x260 kernel/task_work.c:227 ptrace_notify+0x281/0x2c0 kernel/signal.c:2520 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x1d0 kernel/entry/common.c:173 syscall_exit_to_user_mode_work include/linux/entry-common.h:412 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2ad/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2795d958e9 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:00007f2795d4e218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f2795e21328 RCX: 00007f2795d958e9 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007f2795e21320 R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000003c0 R11: 0000000000000246 R12: 00007f2795dee084 R13: 0000200000000c40 R14: 0000200000007c50 R15: 0000200000007ac0