watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.8.512:8089] Modules linked in: irq event stamp: 11094907 hardirqs last enabled at (11094906): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (11094907): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (58472): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (58472): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (58472): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (58475): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (58475): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (58475): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 8089 Comm: syz.8.512 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:rcu_read_lock include/linux/rcupdate.h:842 [inline] RIP: 0010:trace_call_bpf+0xdd/0x850 kernel/trace/bpf_trace.c:-1 Code: 00 00 00 00 48 c7 c7 20 a1 13 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 56 e8 5c 56 d2 ff 48 83 c4 08 e8 03 b6 af 09 <41> 89 c4 31 ff 89 c6 e8 b7 ac f4 ff 85 db 0f 85 7f 05 00 00 45 85 RSP: 0018:ffffc90000a07920 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff888025319e00 RDX: 0000000000000000 RSI: ffffffff8dbaa0c3 RDI: ffffffff8be34280 RBP: ffffc90000a07a18 R08: 0000000000000000 R09: ffffffff81cb18b7 R10: dffffc0000000000 R11: fffff91ffffb4660 R12: ffffe8ffffda32d8 R13: 1ffff92000140f30 R14: ffffffff81cb18b7 R15: ffffffff8e009200 FS: 00007fa90176c6c0(0000) GS:ffff888125d12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000021000 CR3: 00000000761ea000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10918 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:1169 [inline] is_module_text_address+0x18b/0x1e0 kernel/module/main.c:3847 kernel_text_address+0x94/0xe0 kernel/extable.c:119 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 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+0x84b/0x13c0 net/wireless/scan.c:1937 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1984 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2376 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3235 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3326 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+0x36c/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:bpf_bprintf_prepare+0x5fe/0x13a0 kernel/bpf/helpers.c:879 Code: 84 c0 0f 85 74 0a 00 00 0f b6 1b 89 de 83 e6 30 31 ff e8 35 47 e1 ff 83 e3 30 0f 84 73 0c 00 00 e8 27 44 e1 ff e9 00 03 00 00 1d 44 e1 ff b8 04 00 00 00 48 89 44 24 30 4c 8b 74 24 20 4d 01 RSP: 0018:ffffc90003b6ee40 EFLAGS: 00000293 RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000000001 RDX: ffffffff81de7c8e RSI: ffffffff8e1ce590 RDI: 0000000000000000 RBP: ffffc90003b6ef70 R08: ffff888025319e00 R09: 0000000000000004 R10: 0000000000000073 R11: 0000000000000002 R12: dffffc0000000000 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000004 ____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline] bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362 bpf_prog_7f567dbfb2ee2ca1+0x41/0x49 bpf_dispatcher_nop_func include/linux/bpf.h:1340 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] bpf_prog_run_array include/linux/bpf.h:2307 [inline] trace_call_bpf+0x326/0x850 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10918 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] __update_page_owner_handle+0x51a/0x570 mm/page_owner.c:258 __set_page_owner+0x10b/0x4a0 mm/page_owner.c:330 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 ___kmalloc_large_node+0x5f/0x1b0 mm/slub.c:4317 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:4348 __do_kmalloc_node mm/slub.c:4364 [inline] __kvmalloc_node_noprof+0x6d/0x5f0 mm/slub.c:5067 netlink_alloc_large_skb+0x5d/0x110 net/netlink/af_netlink.c:1188 netlink_sendmsg+0x5c6/0xb30 net/netlink/af_netlink.c:1871 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 sock_write_iter+0x258/0x330 net/socket.c:1179 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 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: 0033:0x7fa90098ec29 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:00007fa90176c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa900bd6090 RCX: 00007fa90098ec29 RDX: 000000000000fe33 RSI: 0000200000000000 RDI: 0000000000000007 RBP: 00007fa900a11e41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa900bd6128 R14: 00007fa900bd6090 R15: 00007ffc0a41d2f8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8096 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5f 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 5f RSP: 0018:ffffc90003f9f660 EFLAGS: 00000293 RAX: ffffffff81b4621b RBX: 1ffff110170e7f61 RCX: ffff88806e90bc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003f9f7e0 R08: ffffffff8fa3b237 R09: 1ffffffff1f47646 R10: dffffc0000000000 R11: fffffbfff1f47647 R12: ffff8880b873fb08 R13: dffffc0000000000 R14: ffff8880b863b1c0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125c12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000751000 CR3: 000000000df36000 CR4: 00000000003526f0 DR0: ffffffffffffffff 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+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245