watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.48:6152] Modules linked in: irq event stamp: 13555045 hardirqs last enabled at (13555044): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (13555045): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (232812): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (232812): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (232812): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (232815): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (232815): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (232815): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6152 Comm: syz.2.48 Not tainted 6.16.0-syzkaller-gf3af62b6cee8 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:perf_swevent_event+0xe/0x5e0 kernel/events/core.c:10442 Code: 00 e9 0f ff ff ff e8 21 14 88 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 <41> 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 49 89 ce 48 89 54 24 18 RSP: 0018:ffffc90000006718 EFLAGS: 00000246 RAX: ffffffff81ef39bd RBX: 0000000000000000 RCX: ffff8880b8632a28 RDX: ffffc900000067c0 RSI: 0000000000000001 RDI: ffff888027a76400 RBP: ffffc90000006730 R08: ffffc900000067d7 R09: 0000000000000000 R10: ffffc900000067c8 R11: fffff52000000cfb R12: ffff888027a76400 R13: ffffc900000067c8 R14: ffff8880b8632ab0 R15: dffffc0000000000 FS: 00007f73f47936c0(0000) GS:ffff888125c2a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3a9541 CR3: 00000000748c0000 CR4: 00000000003526f0 Call Trace: perf_tp_event+0x4f6/0x1380 kernel/events/core.c:10972 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10896 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962 cfg80211_update_known_bss+0x634/0x1330 net/wireless/scan.c:1936 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1983 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2375 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3234 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3325 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5186 [inline] ieee80211_rx_list+0x201c/0x2a90 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217 Code: 24 65 48 8b 0c 25 08 60 9f 92 65 8b 15 28 c1 df 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c <8b> 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 RSP: 0018:ffffc9000b9374e8 EFLAGS: 00000246 RAX: ffffffff81ef2c02 RBX: 0000000000000000 RCX: ffff88807a8a0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8fa32437 R09: 1ffffffff1f46486 R10: dffffc0000000000 R11: fffffbfff1f46487 R12: 1ffff1100f514285 R13: dffffc0000000000 R14: ffff88807a8a142c R15: dffffc0000000000 get_recursion_context kernel/events/internal.h:220 [inline] perf_swevent_get_recursion_context+0xb2/0x100 kernel/events/core.c:10577 perf_trace_buf_alloc+0x59/0x2a0 kernel/trace/trace_event_perf.c:410 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x18d/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] mod_objcg_mlstate+0x1d3/0x260 mm/memcontrol.c:2557 drain_obj_stock+0x23e/0x3c0 mm/memcontrol.c:2993 refill_obj_stock+0x247/0x850 mm/memcontrol.c:3041 obj_cgroup_charge_account+0x116/0x660 mm/memcontrol.c:3105 __memcg_slab_post_alloc_hook+0x3e6/0x7f0 mm/memcontrol.c:3189 memcg_slab_post_alloc_hook mm/slub.c:2216 [inline] slab_post_alloc_hook mm/slub.c:4190 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x2bf/0x3c0 mm/slub.c:4236 alloc_empty_file+0x55/0x1d0 fs/file_table.c:237 path_openat+0x107/0x3830 fs/namei.c:4032 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f73f398eb69 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:00007f73f4793038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f73f3bb6080 RCX: 00007f73f398eb69 RDX: 0000000000200002 RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007f73f3a11df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f73f3bb6080 R15: 00007fff6d44d378 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6170 Comm: kworker/u8:14 Not tainted 6.16.0-syzkaller-gf3af62b6cee8 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 d6 59 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 81 55 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 65 55 RSP: 0018:ffffc9000b9d7660 EFLAGS: 00000293 RAX: ffffffff81b4498b RBX: 1ffff110170c8341 RCX: ffff88807dce3c00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000b9d77e0 R08: ffffffff8fa32437 R09: 1ffffffff1f46486 R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffff8880b8641a08 R13: dffffc0000000000 R14: ffff8880b873b1c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125d2a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd18b3d5c CR3: 000000000df36000 CR4: 00000000003526f0 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1044 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2654 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2864 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xc5/0x1b0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1a1/0x240 mm/kfence/core.c:855 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245