rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10499 ticks this GP) idle=86cc/1/0x4000000000000000 softirq=12954/12954 fqs=5249 rcu: hardirqs softirqs csw/system rcu: number: 5442 0 0 rcu: cputime: 82 0 52407 ==> 52490(ms) rcu: (t=10500 jiffies g=7289 q=207 ncpus=2) CPU: 1 UID: 0 PID: 5813 Comm: syz-executor226 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:417 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 e9 2b 0f e3 f5 cc RSP: 0018:ffffc90003d36c30 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffff8b3034c3 RDX: 0000000000000004 RSI: 0000000000000000 RDI: ffff888079972480 RBP: ffff8880339f32c0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff920007a6d91 R13: ffff8880339f3340 R14: ffff8880339ed14e R15: ffff8880339ec000 FS: 00007fc0d62786c0(0000) GS:ffff888124444000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc0d6257d58 CR3: 0000000071b04000 CR4: 00000000003526f0 Call Trace: __refcount_add include/linux/refcount.h:290 [inline] __refcount_inc include/linux/refcount.h:366 [inline] refcount_inc include/linux/refcount.h:383 [inline] sock_hold include/net/sock.h:834 [inline] tipc_sk_lookup+0x423/0xa00 net/tipc/socket.c:3000 tipc_sk_rcv+0x2ee/0x1ce0 net/tipc/socket.c:2490 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701 tipc_node_xmit_skb+0xf5/0x160 net/tipc/node.c:1766 tipc_sk_rcv+0x172d/0x1ce0 net/tipc/socket.c:2520 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701 tipc_sk_push_backlog+0x318/0xa00 net/tipc/socket.c:1312 tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x960/0x3240 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0xef6/0x1ce0 net/tipc/socket.c:2495 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x16f/0x1e0 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1185 [inline] __release_sock+0x3a2/0x440 net/core/sock.c:3213 release_sock+0x5a/0x220 net/core/sock.c:3795 tipc_release+0xb42/0x16b0 net/tipc/socket.c:650 __sock_release+0xb3/0x260 net/socket.c:662 sock_close+0x1c/0x30 net/socket.c:1455 __fput+0x3ff/0xb40 fs/file_table.c:469 task_work_run+0x150/0x240 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0x100/0x4a0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc0d62a04a9 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:00007fc0d6278218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007fc0d6352b48 RCX: 00007fc0d62a04a9 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007fc0d6352b40 R08: 35203a6b63617473 R09: 35203a6b63617473 R10: 00002000000003c0 R11: 0000000000000246 R12: 00007fc0d6324384 R13: 0000200000000f00 R14: 0000200000002a90 R15: 00002000000029c0