watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.1.8313:29542]
Modules linked in:
CPU: 0 PID: 29542 Comm: syz.1.8313 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:196
Code: 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d 8c cc 5e 05 48 89 de e8 c4 d6 39 00 5b 5d c3 00 55 48 89 e5 48 8b 45 08 <65> 48 8b 0d f0 c9 9d 7e 65 8b 15 f5 c9 9d 7e f7 c2 00 01 ff 00 74
RSP: 0018:ffffc90001536850 EFLAGS: 00000246
RAX: ffffffff8466a5d2 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88812076cf00 RSI: 00000000d07526d2 RDI: 0000000000000000
RBP: ffffc90001536850 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520002a6cfc R12: ffffc90001536ca0
R13: ffff88812c0e8001 R14: 00000000d07526d2 R15: 00000000d07526d2
FS:  00007f3a66d5f6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a66d3ed58 CR3: 000000012c8d8000 CR4: 00000000003506b0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 tipc_skb_peek_port net/tipc/msg.h:1251 [inline]
 tipc_sk_rcv+0x322/0x1df0 net/tipc/socket.c:2489
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1754
 tipc_sk_rcv+0x1913/0x1df0 net/tipc/socket.c:2499
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1674
 tipc_sk_push_backlog+0x4d3/0x7b0 net/tipc/socket.c:1306
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1358 [inline]
 tipc_sk_proto_rcv+0x9c3/0x1b00 net/tipc/socket.c:2156
 tipc_sk_filter_rcv+0x30b7/0x3860 net/tipc/socket.c:2352
 tipc_sk_enqueue net/tipc/socket.c:2444 [inline]
 tipc_sk_rcv+0x745/0x1df0 net/tipc/socket.c:2495
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1674
 tipc_node_xmit_skb net/tipc/node.c:1739 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1754
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2412
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2589
 release_sock net/core/sock.c:3142 [inline]
 sock_setsockopt+0x1801/0x2620 net/core/sock.c:1257
 __sys_setsockopt+0x272/0x480 net/socket.c:2143
 __do_sys_setsockopt net/socket.c:2158 [inline]
 __se_sys_setsockopt net/socket.c:2155 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2155
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3a68327019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3a66d5f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f3a685af090 RCX: 00007f3a68327019
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 00000000000000c5
RBP: 00007f3a683be00c R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a685af128 R14: 00007f3a685af090 R15: 00007fff426d15a8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 659 Comm: kworker/u4:5 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x209/0x490 kernel/smp.c:517
Code: 48 44 89 f6 83 e6 01 31 ff e8 73 85 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 ae 81 0a 00 e9 a4 00 00 00 f3 90 <f7> 44 24 48 01 00 00 00 0f 84 8f 00 00 00 e8 94 81 0a 00 eb e9 e8
RSP: 0018:ffffc90000e67700 EFLAGS: 00000293
RAX: ffffffff815a21ec RBX: 0000000000000000 RCX: ffff88811d92e2c0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000e677f0 R08: ffff8881f7057647 R09: 1ffff1103ee0aec8
R10: dffffc0000000000 R11: ffffed103ee0aec9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff920001ccee4
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2df0320060 CR3: 000000000640f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 smp_call_function_many_cond+0x8f5/0x9d0 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/0x180 kernel/smp.c:837
 text_poke_sync arch/x86/kernel/alternative.c:1568 [inline]
 text_poke_bp_batch+0x1cb/0x5f0 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+0x38f/0x3b0 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+0xba/0x440 mm/kfence/core.c:624
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298