watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.3.895:9408] Modules linked in: irq event stamp: 13736813 hardirqs last enabled at (13736812): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13736813): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (13553302): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (13553302): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (13553302): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (13553305): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (13553305): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (13553305): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 9408 Comm: syz.3.895 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 89 fb e8 23 00 00 00 48 8b 3d 64 e2 d2 0b 48 89 de 5b e9 53 8b 5a 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 0c 25 08 70 6e 92 65 8b 15 68 6c RSP: 0018:ffffc90000a07f78 EFLAGS: 00000246 RAX: 0000000000000400 RBX: 0000000000000000 RCX: ffff888025308000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a081e8 R08: ffffc90000a08017 R09: 0000000000000000 R10: ffffc90000a08008 R11: fffff52000141003 R12: ffff8880577b6a40 R13: ffffc90000a08008 R14: ffff8880b8932af0 R15: dffffc0000000000 FS: 00007f49518c06c0(0000) GS:ffff888126239000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c36c091 CR3: 0000000058efc000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_sample_save_raw_data include/linux/perf_event.h:1392 [inline] perf_tp_event+0x2ad/0x1380 kernel/events/core.c:11011 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10936 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_node_noprof+0x433/0x710 mm/slub.c:5340 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 __netdev_alloc_skb+0x108/0x970 net/core/skbuff.c:734 netdev_alloc_skb include/linux/skbuff.h:3484 [inline] dev_alloc_skb include/linux/skbuff.h:3497 [inline] __ieee80211_beacon_get+0xc06/0x1880 net/mac80211/tx.c:5652 ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5774 ieee80211_beacon_get include/net/mac80211.h:5667 [inline] mac80211_hwsim_beacon_tx+0x3ce/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2361 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1858 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x11/0x90 kernel/kcov.c:321 Code: cc cc 0f 1f 80 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 0c 25 08 70 6e 92 <65> 8b 15 88 67 ae 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 RSP: 0018:ffffc9000c5d79e8 EFLAGS: 00000246 RAX: ffffffff81f0c0e7 RBX: 0000000080000001 RCX: ffff888025308000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000c5d7b00 R08: 0000000000000000 R09: 0000000000000001 R10: ffffc9000c5d7808 R11: fffff520018baf03 R12: 1ffff920018baf00 R13: dffffc0000000000 R14: ffff888025308000 R15: dffffc0000000000 interrupt_context_level include/linux/preempt.h:96 [inline] get_recursion_context kernel/events/internal.h:215 [inline] perf_swevent_get_recursion_context+0x57/0x100 kernel/events/core.c:10617 perf_trace_buf_alloc+0x59/0x2a0 kernel/trace/trace_event_perf.c:410 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x196/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5831 fs_reclaim_acquire+0x99/0x100 mm/page_alloc.c:4281 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4929 [inline] slab_alloc_node mm/slub.c:5264 [inline] __do_kmalloc_node mm/slub.c:5649 [inline] __kmalloc_noprof+0x9c/0x7f0 mm/slub.c:5662 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] lsm_blob_alloc security/security.c:690 [inline] lsm_sock_alloc security/security.c:4922 [inline] security_sk_alloc+0x52/0x390 security/security.c:4938 sk_prot_alloc+0x101/0x220 net/core/sock.c:2242 sk_alloc+0x3a/0x370 net/core/sock.c:2295 __netlink_create+0x65/0x260 net/netlink/af_netlink.c:628 netlink_create+0x3ca/0x590 net/netlink/af_netlink.c:686 __sock_create+0x4b3/0x9f0 net/socket.c:1605 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1747 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f495098f749 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:00007f49518c0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f4950be5fa0 RCX: 00007f495098f749 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f4950a13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4950be6038 R14: 00007f4950be5fa0 R15: 00007ffcd7689838 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9401 Comm: syz.7.893 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:unwind_get_return_address+0x4/0x90 arch/x86/kernel/unwind_orc.c:365 Code: e8 e1 3a b2 00 4c 89 f7 4c 89 fe e9 29 ff ff ff e8 a1 16 d3 09 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 48 89 fb 49 be 00 00 00 00 00 fc ff df 48 89 f8 48 RSP: 0018:ffffc90000006c80 EFLAGS: 00000202 RAX: 0000000090183f01 RBX: ffffc90000006d40 RCX: b079efc8c8864600 RDX: 0000000000000003 RSI: ffffffff8d8f55b7 RDI: ffffc90000006c88 RBP: ffffc90000006d10 R08: ffffc900000067d7 R09: 0000000000000000 R10: ffffc900000067c8 R11: fffff52000000cfb R12: ffff888028ac9e40 R13: 0000000000000000 R14: ffffffff81ac2e10 R15: ffffc90000006c88 FS: 00007f73937ed6c0(0000) GS:ffff888126139000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f620452eff8 CR3: 000000007e330000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2543 [inline] slab_free mm/slub.c:6642 [inline] kfree+0x19a/0x6d0 mm/slub.c:6849 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2385 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline] ieee80211_rx_list+0x2192/0x2c10 net/mac80211/rx.c:5451 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5474 ieee80211_rx include/net/mac80211.h:5214 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x36c/0x580 kernel/softirq.c:925 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__schedule+0x0/0x4cc0 kernel/sched/core.c:6785 Code: de f6 45 89 f8 89 d9 48 8b 5c 24 08 e9 ee fe ff ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc9000c5e7978 EFLAGS: 00000282 RAX: b079efc8c8864600 RBX: ffff888028ac9e40 RCX: b079efc8c8864600 RDX: 0000000000000007 RSI: ffffffff8d70e869 RDI: 0000000000000001 RBP: ffffc9000c5e7a20 R08: ffffffff8f7cef77 R09: 1ffffffff1ef9dee R10: dffffc0000000000 R11: fffffbfff1ef9def R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920018bcf30 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:put_cpu_partial+0x234/0x2e0 mm/slub.c:3950 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 e9 e7 fe ff ff e8 19 6b 2b 09 41 f7 c5 00 02 00 00 74 b2 fb 4d 85 ff <75> b1 eb ba e8 03 6b 2b 09 e9 4f fe ff ff 90 0f 0b 90 e9 66 ff ff RSP: 0018:ffffc9000c5e7ae0 EFLAGS: 00000286 RAX: b079efc8c8864600 RBX: ffff88801a027140 RCX: b079efc8c8864600 RDX: 0000000000000007 RSI: ffffffff8d70e869 RDI: ffffffff8bbf08e0 RBP: 0000000000000001 R08: ffffffff8f7cef77 R09: 1ffffffff1ef9dee R10: dffffc0000000000 R11: fffffbfff1ef9def R12: 0000000000000000 R13: 0000000000000282 R14: ffff8880b883e850 R15: ffffea000157d000 __slab_free+0x2b9/0x390 mm/slub.c:5929 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5295 lsm_file_alloc security/security.c:739 [inline] security_file_alloc+0x34/0x330 security/security.c:2927 init_file+0x93/0x2f0 fs/file_table.c:159 alloc_empty_file+0x6e/0x1d0 fs/file_table.c:241 alloc_file fs/file_table.c:354 [inline] alloc_file_pseudo+0x13d/0x210 fs/file_table.c:383 sock_alloc_file+0xb8/0x2e0 net/socket.c:483 sock_map_fd net/socket.c:513 [inline] __sys_socket+0x13d/0x1b0 net/socket.c:1756 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f739298f749 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:00007f73937ed038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f7392be5fa0 RCX: 00007f739298f749 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000000a RBP: 00007f7392a13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7392be6038 R14: 00007f7392be5fa0 R15: 00007ffc3a12aac8