watchdog: BUG: soft lockup - CPU#1 stuck for 117s! [syz.1.5887:22671] Modules linked in: CPU: 1 PID: 22671 Comm: syz.1.5887 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:rht_obj include/linux/rhashtable.h:116 [inline] RIP: 0010:rhashtable_lookup include/linux/rhashtable.h:640 [inline] RIP: 0010:tipc_sk_lookup+0x4b4/0x5f0 net/tipc/socket.c:2997 Code: ef 49 89 f4 e8 0d eb 3f fd 4c 89 e6 e9 0d fd ff ff 4d 85 ed 74 7c 49 bc 00 00 00 00 00 fc ff df 48 8b 44 24 20 42 0f b6 04 20 <84> c0 0f 85 0e 01 00 00 48 8b 44 24 08 0f b7 00 49 29 c5 74 67 49 RSP: 0018:ffffc900011369a0 EFLAGS: 00000286 RAX: 0000000000000000 RBX: 000000000000035c RCX: 0000000000000002 RDX: ffff8881300dcf00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001136a90 R08: 0000000000000004 R09: 0000000001136a03 R10: fffff52000226d44 R11: 1ffff92000226d44 R12: dffffc0000000000 R13: ffff8881109dbae8 R14: 0000000000000000 R15: fffffffffffffc18 FS: 00007f3f705ec6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3f705caf98 CR3: 0000000157090000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tipc_sk_rcv+0x3eb/0x1ef0 net/tipc/socket.c:2488 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb+0xe9/0x130 net/tipc/node.c:1739 tipc_sk_rcv+0x1d77/0x1ef0 net/tipc/socket.c:2518 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_sk_push_backlog net/tipc/socket.c:1306 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x1581/0x3850 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2442 [inline] tipc_sk_rcv+0x7cc/0x1ef0 net/tipc/socket.c:2493 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1058 [inline] __release_sock+0x146/0x360 net/core/sock.c:2588 release_sock+0x60/0x1b0 net/core/sock.c:3139 tipc_release+0xbd4/0x1490 net/tipc/socket.c:639 __sock_release net/socket.c:597 [inline] sock_close+0xe0/0x270 net/socket.c:1286 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3f71b84749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3f705ec038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f3f71ddafa0 RCX: 00007f3f71b84749 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000004 RBP: 00007f3f71c08f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3f71ddb038 R14: 00007f3f71ddafa0 R15: 00007ffe08d62368 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 302 Comm: kworker/u4:4 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline] RIP: 0010:smp_call_function_single+0x203/0x470 kernel/smp.c:517 Code: 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 02 6c 0a 00 e9 a9 00 00 00 f3 90 f7 44 24 48 01 00 00 00 0f 84 94 00 00 00 e8 6b 0a 00 eb e9 e8 71 f0 19 03 89 c3 41 89 c4 bf 08 00 00 00 RSP: 0018:ffffc900079f7720 EFLAGS: 00000202 RAX: ffffffff81593858 RBX: 0000000000000000 RCX: ffff88810d3fbb40 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900079f7810 R08: dffffc0000000000 R09: ffffed103ee2aec9 R10: ffffed103ee2aec9 R11: 1ffff1103ee2aec8 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff92000f3eee8 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fba2df626e8 CR3: 000000000620f000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0x8f2/0x9e0 kernel/smp.c:653 smp_call_function_many kernel/smp.c:716 [inline] smp_call_function kernel/smp.c:738 [inline] on_each_cpu+0xab/0x170 kernel/smp.c:837 text_poke_sync arch/x86/kernel/alternative.c:1568 [inline] text_poke_bp_batch+0x1c4/0x580 arch/x86/kernel/alternative.c:1768 text_poke_flush arch/x86/kernel/alternative.c:1959 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1966 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:459 jump_label_update+0x34c/0x3e0 kernel/jump_label.c:825 static_key_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:177 static_key_enable+0x1a/0x30 kernel/jump_label.c:190 toggle_allocation_gate+0xb4/0x400 mm/kfence/core.c:624 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447 kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298