watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.5.342:7317] Modules linked in: irq event stamp: 11866073 hardirqs last enabled at (11866072): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (11866073): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (7615650): [] do_softirq+0xec/0x180 kernel/softirq.c:480 softirqs last disabled at (7615653): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (7615653): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (7615653): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7317 Comm: syz.5.342 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:ieee80211_rx_h_check_more_data net/mac80211/rx.c:1557 [inline] RIP: 0010:ieee80211_rx_handlers+0x367/0xb760 net/mac80211/rx.c:4120 Code: 08 4c 89 f7 e8 7a 51 2f f7 4d 8b 3e 4d 8d b7 7c 1f 00 00 4d 89 f5 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 <84> c0 4c 8b 64 24 40 0f 85 54 6c 00 00 41 80 3e 00 0f 84 ac 00 00 RSP: 0018:ffffc90000007500 EFLAGS: 00000a07 RAX: 0000000000000000 RBX: ffff888063b683c0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888063b683d0 RBP: ffffc900000077b0 R08: ffff888063b683cf R09: 0000000000000000 R10: ffff888063b683c0 R11: ffffed100c76d07a R12: 0000000000010000 R13: 1ffff11009f355b7 R14: ffff88804f9aadbc R15: ffff88804f9a8e40 FS: 00007fb0277ff6c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b34822ff8 CR3: 0000000028a3a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000082 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ieee80211_invoke_rx_handlers net/mac80211/rx.c:4171 [inline] ieee80211_prepare_and_rx_handle+0x266f/0x63f0 net/mac80211/rx.c:5031 __ieee80211_rx_handle_packet net/mac80211/rx.c:5288 [inline] ieee80211_rx_list+0x21b8/0x2a90 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+0x283/0x870 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:should_resched arch/x86/include/asm/preempt.h:104 [inline] RIP: 0010:__local_bh_enable_ip+0x135/0x1c0 kernel/softirq.c:414 Code: 8b e8 9f 5a f4 09 65 66 8b 05 4f 58 1b 11 66 85 c0 75 5a bf 01 00 00 00 e8 58 15 0b 00 e8 e3 6d 42 00 fb 65 8b 05 2b 58 1b 11 <85> c0 75 05 e8 e2 de ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00 RSP: 0018:ffffc90002e87920 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 0000000000000200 RCX: b9672128cc3c2500 RDX: 0000000000000000 RSI: ffffffff8d9b68b0 RDI: ffffffff8be33280 RBP: ffffc90002e879b0 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6 R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffffffff89a26fc7 R13: ffffc90002e5e030 R14: dffffc0000000000 R15: 1ffff920005d0f24 local_bh_enable include/linux/bottom_half.h:33 [inline] bpf_test_run+0x376/0x7b0 net/bpf/test_run.c:437 bpf_prog_test_run_skb+0xb30/0x1560 net/bpf/test_run.c:1099 bpf_prog_test_run+0x2c4/0x340 kernel/bpf/syscall.c:4590 __sys_bpf+0x581/0x870 kernel/bpf/syscall.c:6047 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137 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: 0033:0x7fb02698ebe9 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:00007fb0277ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb026bc6090 RCX: 00007fb02698ebe9 RDX: 0000000000000028 RSI: 0000200000000080 RDI: 000000000000000a RBP: 00007fb026a11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb026bc6128 R14: 00007fb026bc6090 R15: 00007fffc166e458 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7336 Comm: kworker/u8:12 Not tainted syzkaller #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 b6 62 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5e 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 45 5e RSP: 0018:ffffc900025ff660 EFLAGS: 00000293 RAX: ffffffff81b44e0b RBX: 1ffff110170c8341 RCX: ffff88802b131e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900025ff7e0 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6 R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffff8880b8641a08 R13: dffffc0000000000 R14: ffff8880b873b1c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08808f7d60 CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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:2653 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2863 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245