watchdog: BUG: soft lockup - CPU#1 stuck for 113s! [syz-executor:10444] Modules linked in: irq event stamp: 97495 hardirqs last enabled at (97494): [] __local_bh_enable_ip+0xd6/0x140 kernel/softirq.c:478 hardirqs last disabled at (97495): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (93848): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last enabled at (93848): [] __alloc_skb+0x18d/0x7a0 net/core/skbuff.c:697 softirqs last disabled at (93881): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last disabled at (93881): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last disabled at (93881): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 CPU: 1 UID: 0 PID: 10444 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:37 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:179 [inline] RIP: 0010:write_comp_data kernel/kcov.c:242 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x10/0xb0 kernel/kcov.c:310 Code: 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d e8 ad cd 11 <65> 48 8b 15 e8 ad cd 11 f7 c2 00 01 00 ff 74 2c 41 89 d0 41 81 e0 RSP: 0018:ffffc90000a17ff8 EFLAGS: 00000246 RAX: ffffffff81d43e1a RBX: 0000000000000000 RCX: ffff888032260000 RDX: 000000004dae9a2e RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000a180f8 R08: ffffffff81d43de4 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff91ffff62805 R12: 0000000000000001 R13: dffffc0000000000 R14: 1ffff9200014300c R15: ffffffff8ec28780 FS: 00005555931ea500(0000) GS:ffff888124dc5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2cb020e97d CR3: 000000007768e000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_lock include/linux/rcupdate.h:850 [inline] trace_call_bpf+0xea/0xb80 kernel/trace/bpf_trace.c:-1 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11433 do_perf_trace_lock include/trace/events/lock.h:49 [inline] perf_trace_lock+0x32e/0x410 include/trace/events/lock.h:49 __do_trace_lock_release include/trace/events/lock.h:68 [inline] trace_lock_release include/trace/events/lock.h:68 [inline] lock_release+0x396/0x3c0 kernel/locking/lockdep.c:5954 rcu_lock_release include/linux/rcupdate.h:319 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] class_rcu_destructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x321/0x600 mm/slub.c:5563 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] ref_tracker_alloc+0x15b/0x4b0 lib/ref_tracker.c:270 __netdev_tracker_alloc include/linux/netdevice.h:4528 [inline] netdev_hold include/linux/netdevice.h:4557 [inline] dst_init+0xbe/0x470 net/core/dst.c:52 dst_alloc+0x12a/0x170 net/core/dst.c:94 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x72/0x430 net/ipv6/route.c:3346 ndisc_send_skb+0x42f/0x1650 net/ipv6/ndisc.c:492 addrconf_rs_timer+0x2d2/0x6c0 net/ipv6/addrconf.c:4073 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:addr_has_metadata mm/kasan/kasan.h:333 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:188 [inline] RIP: 0010:kasan_check_range+0x3f/0x2c0 mm/kasan/generic.c:200 Code: ae 01 00 00 4c 8d 04 37 49 39 f8 0f 82 36 02 00 00 49 b9 00 00 00 00 00 80 ff ff eb 0d cc cc cc 49 b9 00 00 00 00 00 00 00 ff <4c> 39 cf 0f 82 14 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 RSP: 0018:ffffc9000d2d7640 EFLAGS: 00000212 RAX: 0000000000000001 RBX: 000000000000000d RCX: ffffffff81a29a73 RDX: 0000000000000001 RSI: 000000000000000d RDI: ffffe8ffffb12018 RBP: ffffc9000d2d7788 R08: ffffe8ffffb12025 R09: ffff800000000000 R10: dffffc0000000000 R11: fffffbfff181c861 R12: ffffffff81a29a73 R13: 000000000000000e R14: ffffffff8c0e4300 R15: ffffe8ffffb12018 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 do_perf_trace_lock include/trace/events/lock.h:61 [inline] perf_trace_lock+0x2b3/0x410 include/trace/events/lock.h:49 __do_trace_lock_release include/trace/events/lock.h:68 [inline] trace_lock_release include/trace/events/lock.h:68 [inline] lock_release+0x396/0x3c0 kernel/locking/lockdep.c:5954 rcu_lock_release include/linux/rcupdate.h:319 [inline] rcu_read_unlock include/linux/rcupdate.h:880 [inline] class_rcu_destructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4683 [inline] slab_alloc_node mm/slub.c:4996 [inline] kmem_cache_alloc_noprof+0x2b9/0x600 mm/slub.c:5010 sk_prot_alloc+0x57/0x210 net/core/sock.c:2246 sk_alloc+0x3a/0x390 net/core/sock.c:2308 unix_create1+0xb0/0x7c0 net/unix/af_unix.c:-1 unix_create+0x14c/0x1d0 net/unix/af_unix.c:1180 __sock_create+0x4b3/0x9d0 net/socket.c:1676 sock_create net/socket.c:1734 [inline] __sys_socket_create net/socket.c:1771 [inline] __sys_socket+0xd6/0x1b0 net/socket.c:1818 __do_sys_socket net/socket.c:1832 [inline] __se_sys_socket net/socket.c:1830 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1830 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6224f9f9c7 Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 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:00007ffc7feb0a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f62250356eb RCX: 00007f6224f9f9c7 RDX: 0000000000000000 RSI: 0000000000080002 RDI: 0000000000000001 RBP: 0000000000000003 R08: 0000000000000000 R09: 00000000fffffff9 R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffc7feb0ac0 R13: 00007f62250356eb R14: 00007f6225d54620 R15: 00007f62250356eb Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8267 Comm: kworker/u8:34 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x80 kernel/kcov.c:206 Code: 89 fb e8 23 00 00 00 48 8b 3d 54 b3 a6 0c 48 89 de 5b e9 d3 6b 65 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0d e8 b2 cd 11 65 48 8b 15 e8 b2 RSP: 0018:ffffc90004c37718 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880b87414c8 RCX: ffff88807f615dc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90004c37870 R08: ffff88807f61735f R09: 1ffff1100fec2e6b R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff110170e8299 R13: 0000000000000001 R14: ffff8880b87414c0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888124cc5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe4887f558 CR3: 000000000eb48000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: csd_lock_wait kernel/smp.c:363 [inline] csd_lock kernel/smp.c:396 [inline] smp_call_function_many_cond+0x63e/0x1500 kernel/smp.c:944 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2641 [inline] smp_text_poke_batch_finish+0x5fd/0x1110 arch/x86/kernel/alternative.c:2851 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:902 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245