RBP: 00007f3f5d4cef91 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3f5d6a3128 R14: 00007f3f5d6a3090 R15: 00007ffdd3462608 watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.7.4010:14676] Modules linked in: CPU: 1 PID: 14676 Comm: syz.7.4010 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:preempt_count_add+0x2b/0x1b0 kernel/sched/core.c:4456 Code: 48 89 e5 41 57 41 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 c0 c8 c7 86 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 01 01 00 00 <83> 3d 2e b6 83 05 00 75 07 65 8b 05 f1 5a be 7e 65 01 3d ea 5a be RSP: 0018:ffffc900012de918 EFLAGS: 00000297 RAX: 0000000000000004 RBX: ffffc900012dee54 RCX: ffffffff86c7c803 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000201 RBP: ffffc900012de930 R08: dffffc0000000000 R09: ffffed102181a011 R10: ffffed102181a011 R11: 1ffff1102181a010 R12: dffffc0000000000 R13: ffffc900012dee50 R14: ffffc900012de960 R15: dffffc0000000000 FS: 00007f3f5be936c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3f5be71f98 CR3: 000000011273b000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __local_bh_disable_ip include/linux/bottom_half.h:12 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock_bh+0x6c/0xe0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] tipc_skb_peek_port net/tipc/msg.h:1248 [inline] tipc_sk_rcv+0x221/0x1ef0 net/tipc/socket.c:2487 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_rcv+0x19b9/0x1ef0 net/tipc/socket.c:2497 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:1052 [inline] __release_sock+0x146/0x360 net/core/sock.c:2583 release_sock net/core/sock.c:3134 [inline] sock_setsockopt+0x125e/0x2350 net/core/sock.c:1257 __sys_setsockopt+0x265/0x460 net/socket.c:2142 __do_sys_setsockopt net/socket.c:2157 [inline] __se_sys_setsockopt net/socket.c:2154 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2154 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f3f5d44bec9 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:00007f3f5be93038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f3f5d6a3090 RCX: 00007f3f5d44bec9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 000000000000000a RBP: 00007f3f5d4cef91 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3f5d6a3128 R14: 00007f3f5d6a3090 R15: 00007ffdd3462608 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 467 Comm: kworker/u4:4 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline] RIP: 0010:smp_call_function_single+0x1f5/0x470 kernel/smp.c:517 Code: 48 44 89 f6 83 e6 01 31 ff e8 c7 6f 0a 00 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 44 24 48 01 00 00 00 0f 84 94 00 00 00 e8 e8 6b 0a 00 eb e9 e8 RSP: 0018:ffffc90000d47720 EFLAGS: 00000293 RAX: ffffffff81593a28 RBX: 0000000000000000 RCX: ffff8881191f4f00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000d47810 R08: dffffc0000000000 R09: ffffed103ee2aec9 R10: ffffed103ee2aec9 R11: 1ffff1103ee2aec8 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff920001a8ee8 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffef34a0000 CR3: 000000000620f000 CR4: 00000000003506b0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff3 DR7: 0000000000000600 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