watchdog: BUG: soft lockup - CPU#1 stuck for 155s! [kworker/u8:3:50] Modules linked in: irq event stamp: 6752303 hardirqs last enabled at (6752302): [] __local_bh_enable_ip+0xd6/0x140 kernel/softirq.c:478 hardirqs last disabled at (6752303): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (6746284): [] spin_unlock_bh include/linux/spinlock.h:407 [inline] softirqs last enabled at (6746284): [] cfg80211_inform_single_bss_data+0x1491/0x1be0 net/wireless/scan.c:2463 softirqs last disabled at (6746285): [] do_softirq+0x77/0xd0 kernel/softirq.c:569 CPU: 1 UID: 0 PID: 50 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:check_preemption_disabled+0x1a/0xd0 lib/smp_processor_id.c:53 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 eb fb dc 08 65 48 8b 0d bb fb dc 08 85 c9 74 0c 5b <41> 5e 41 5f 5d e9 fc f4 02 00 cc 9c 59 f7 c1 00 02 00 00 74 ea 65 RSP: 0018:ffffc90000a08700 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000102 RDX: 0000000000000000 RSI: ffffffff8c33c560 RDI: ffffffff8c8e9e80 RBP: ffffc90000a08818 R08: 0000000000000100 R09: 0000000000000000 R10: ffffc90000a087a0 R11: ffffffffa0401354 R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff920001410f0 R15: ffff8880226ea400 FS: 0000000000000000(0000) GS:ffff888123514000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005603e2343008 CR3: 00000000595dc000 CR4: 00000000003526f0 DR0: 0000000000000e40 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_call_bpf+0x7d5/0xb80 kernel/trace/bpf_trace.c:152 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11524 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] ndisc_send_skb+0xe86/0x1650 net/ipv6/ndisc.c:521 addrconf_rs_timer+0x2d2/0x6c0 net/ipv6/addrconf.c:4098 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1749 expire_timers kernel/time/timer.c:1800 [inline] __run_timers kernel/time/timer.c:2375 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2387 run_timer_base kernel/time/timer.c:2396 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2406 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 do_softirq+0x77/0xd0 kernel/softirq.c:569 __local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473 spin_unlock_bh include/linux/spinlock.h:407 [inline] cfg80211_inform_single_bss_data+0x1491/0x1be0 net/wireless/scan.c:2463 cfg80211_inform_bss_data+0x25b/0x3be0 net/wireless/scan.c:3303 cfg80211_inform_bss_frame_data+0x51a/0xae0 net/wireless/scan.c:3399 ieee80211_bss_info_update+0x772/0xa30 net/mac80211/scan.c:236 ieee80211_rx_bss_info net/mac80211/ibss.c:1065 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] ieee80211_ibss_rx_queued_mgmt+0x1ce1/0x2c40 net/mac80211/ibss.c:1573 ieee80211_iface_process_skb net/mac80211/iface.c:1805 [inline] ieee80211_iface_work+0x769/0xfa0 net/mac80211/iface.c:1859 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:610 process_one_work kernel/workqueue.c:3495 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 14990 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 RIP: 0010:csd_lock_wait kernel/smp.c:389 [inline] RIP: 0010:csd_lock kernel/smp.c:422 [inline] RIP: 0010:smp_call_function_many_cond+0x61e/0x1500 kernel/smp.c:970 Code: b6 04 04 84 c0 0f 85 d5 03 00 00 44 8b 3b 44 89 fe 83 e6 01 31 ff e8 51 7a 0c 00 41 83 e7 01 75 07 e8 36 75 0c 00 eb 3f f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 84 c0 75 0f f7 03 01 RSP: 0018:ffffc90005167560 EFLAGS: 00000293 RAX: ffffffff81bca0ee RBX: ffff8880b8341d88 RCX: ffff888028e85dc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900051676b0 R08: ffff888028e8735f R09: 1ffff110051d0e6b R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff110170683b1 R13: 0000000000000001 R14: ffff8880b8341d80 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888123414000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d90acdf088 CR3: 00000000594b2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000008d24 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x910/0x10b0 arch/x86/mm/tlb.c:1435 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:461 [inline] tlb_flush_mmu+0x1af/0xa30 mm/mmu_gather.c:403 tlb_finish_mmu+0xf4/0x220 mm/mmu_gather.c:529 free_ldt_pgtables+0x192/0x360 arch/x86/kernel/ldt.c:411 arch_exit_mmap arch/x86/include/asm/mmu_context.h:229 [inline] exit_mmap+0x1b7/0xa40 mm/mmap.c:1300 __mmput+0x118/0x420 kernel/fork.c:1192 exit_mm+0x18e/0x240 kernel/exit.c:586 do_exit+0x6a8/0x2360 kernel/exit.c:967 do_group_exit+0x22d/0x2f0 kernel/exit.c:1123 __do_sys_exit_group kernel/exit.c:1134 [inline] __se_sys_exit_group kernel/exit.c:1132 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1132 x64_sys_call+0x18c6/0x18d0 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7f839aef16c5 Code: Unable to access opcode bytes at 0x7f839aef169b. RSP: 002b:00007fff1dd81628 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000055d90ace7fa0 RCX: 00007f839aef16c5 RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000 RBP: 000055d90acd3910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1dd81670 R14: 0000000000000000 R15: 0000000000000000