watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.5.284:1549]
Modules linked in:
CPU: 1 PID: 1549 Comm: syz.5.284 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:_raw_spin_trylock_bh+0x108/0x130 kernel/locking/spinlock.c:143
Code: 45 4b c7 44 25 00 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 40 75 2e 89 c8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 72 ff ff ff 48 89 df e8 ef
RSP: 0018:ffffc90001496798 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90001496bc0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 00000000ffffffff
RBP: ffffc90001496a10 R08: dffffc0000000000 R09: ffffed1022877db2
R10: ffffed1022877db2 R11: 1ffff11022877db1 R12: dffffc0000000000
R13: ffff8881143bed00 R14: 000000000f411271 R15: 000000000f411271
FS:  00007f01848336c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000012cc61000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 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:2589
 release_sock+0x60/0x1b0 net/core/sock.c:3142
 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
 get_signal+0x125a/0x12e0 kernel/signal.c:2566
 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 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: 0033:0x7f0185dcb749
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:00007f0184833038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000203a0 RBX: 00007f0186021fa0 RCX: 00007f0185dcb749
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000011
RBP: 00007f0185e4ff91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0186022038 R14: 00007f0186021fa0 R15: 00007ffcb9313288
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1593 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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 <f7> 44 24 48 01 00 00 00 0f 84 94 00 00 00 e8 e8 6b 0a 00 eb e9 e8
RSP: 0018:ffffc90001457720 EFLAGS: 00000293
RAX: ffffffff81593898 RBX: 0000000000000000 RCX: ffff88813b85bb40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001457810 R08: dffffc0000000000 R09: ffffed103ee2aec9
R10: ffffed103ee2aec9 R11: 1ffff1103ee2aec8 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff9200028aee8
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f98d89110e0 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