RBP: 00007efeec54806b R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efeec739308 R14: 00007efeec739270 R15: 00007ffc49ff9258 watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.2.2877:12391] Modules linked in: CPU: 1 PID: 12391 Comm: syz.2.2877 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:57 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x45/0x2a0 mm/kasan/generic.c:189 Code: 49 01 f0 0f 82 1d 02 00 00 49 89 f8 49 c1 e8 2f 41 81 f8 ff ff 01 00 0f 82 09 02 00 00 49 bd 01 00 00 00 00 fc ff df 49 89 fe <49> c1 ee 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c 8d 44 3e RSP: 0018:ffffc90000db6918 EFLAGS: 00000246 RAX: 0000000000000401 RBX: ffffc90000db6e54 RCX: ffffffff84824d74 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000db6980 RBP: ffffc90000db6940 R08: 000000000001ffff R09: 1ffff920001b6dca R10: dffffc0000000000 R11: fffff520001b6dcb R12: dffffc0000000000 R13: dffffc0000000001 R14: ffffc90000db6980 R15: 1ffff920001b6d2c FS: 00007efeeaea76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001000 CR3: 0000000129a33000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:706 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] do_raw_spin_lock include/linux/spinlock.h:184 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x94/0xf0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:360 [inline] tipc_skb_peek_port net/tipc/msg.h:1248 [inline] tipc_sk_rcv+0x230/0x1df0 net/tipc/socket.c:2493 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679 tipc_node_xmit_skb net/tipc/node.c:1744 [inline] tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759 tipc_sk_rcv+0x1913/0x1df0 net/tipc/socket.c:2503 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679 tipc_sk_push_backlog net/tipc/socket.c:1307 [inline] tipc_sk_filter_connect net/tipc/socket.c:2259 [inline] tipc_sk_filter_rcv+0x19ad/0x3860 net/tipc/socket.c:2368 tipc_sk_enqueue net/tipc/socket.c:2448 [inline] tipc_sk_rcv+0x745/0x1df0 net/tipc/socket.c:2499 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679 tipc_node_xmit_skb net/tipc/node.c:1744 [inline] tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2416 sk_backlog_rcv include/net/sock.h:1071 [inline] __release_sock+0x146/0x360 net/core/sock.c:2588 release_sock net/core/sock.c:3141 [inline] sock_setsockopt+0x1801/0x2620 net/core/sock.c:1256 __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: 0033:0x7efeec4b1159 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:00007efeeaea7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007efeec739270 RCX: 00007efeec4b1159 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000048 RBP: 00007efeec54806b R08: 0000000000000004 R09: 0000000000000000 R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efeec739308 R14: 00007efeec739270 R15: 00007ffc49ff9258 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 621 Comm: kworker/u4:4 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 63 90 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 9e 8c 0a 00 e9 a4 00 00 00 f3 90 44 24 48 01 00 00 00 0f 84 8f 00 00 00 e8 84 8c 0a 00 eb e9 e8 RSP: 0018:ffffc90000ea7700 EFLAGS: 00000293 RAX: ffffffff815a288c RBX: 0000000000000000 RCX: ffff8881121a5000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000ea77f0 R08: ffff8881f7157647 R09: 1ffff1103ee2aec8 R10: dffffc0000000000 R11: ffffed103ee2aec9 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff920001d4ee4 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc312cd000 CR3: 000000000640f000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000005 DR2: 0000000000000000 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_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:207 static_key_disable+0x1a/0x30 kernel/jump_label.c:215 toggle_allocation_gate+0x3a5/0x440 mm/kfence/core.c:638 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