watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.0.130:6293] Modules linked in: irq event stamp: 13362155 hardirqs last enabled at (13362154): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (13362154): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (13362154): [] irqentry_exit+0x218/0x910 kernel/entry/common.c:167 hardirqs last disabled at (13362155): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (11928): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last enabled at (11928): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last enabled at (11928): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:767 softirqs last disabled at (11931): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last disabled at (11931): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last disabled at (11931): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:767 CPU: 0 UID: 0 PID: 6293 Comm: syz.0.130 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:101 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x4c3/0x2550 arch/x86/kernel/unwind_orc.c:510 Code: 01 4c 8b 6c 24 50 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 49 8d 6e 38 0f 84 8a 16 00 00 e9 ee 01 00 00 49 89 d5 49 89 d7 <4c> 89 e0 4c 29 f8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 RSP: 0018:ffffc900000075e0 EFLAGS: 00000246 RAX: ffffffff9074b148 RBX: ffffffff9074b14c RCX: ffffffff9074b150 RDX: ffffffff9074b120 RSI: ffffffff90f46236 RDI: ffffffff8c4cd720 RBP: ffffffff81b1e6f8 R08: 000000000000000d R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8eb5a1e0 R12: ffffffff9074b150 R13: ffffffff9074b14c R14: ffffc90000007688 R15: ffffffff9074b150 FS: 00007f74499f66c0(0000) GS:ffff888124f24000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33223ffc CR3: 0000000079d0e000 CR4: 00000000003526f0 Call Trace: arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2677 [inline] slab_free mm/slub.c:6377 [inline] kfree+0x1c5/0x640 mm/slub.c:6692 skb_kfree_head net/core/skbuff.c:1083 [inline] skb_free_head net/core/skbuff.c:1095 [inline] skb_release_data+0x85e/0xab0 net/core/skbuff.c:1122 skb_release_all net/core/skbuff.c:1197 [inline] __kfree_skb+0x5d/0x210 net/core/skbuff.c:1211 __ieee80211_rx_handle_packet net/mac80211/rx.c:-1 [inline] ieee80211_rx_list+0x2eaa/0x3b00 net/mac80211/rx.c:5720 ieee80211_rx_napi+0x1ad/0x3d0 net/mac80211/rx.c:5743 ieee80211_rx include/net/mac80211.h:5449 [inline] ieee80211_handle_queued_frames+0xe4/0x1d0 net/mac80211/main.c:452 tasklet_action_common+0x2d7/0x490 kernel/softirq.c:970 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:767 irq_exit_rcu+0x9/0x30 kernel/softirq.c:784 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:preempt_schedule_irq+0x46/0x90 kernel/sched/core.c:7561 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 a5 b9 ba f5 e8 f0 a6 f5 f5 fb bf 01 00 00 00 25 a4 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 b6 a8 f5 f5 bf 01 RSP: 0018:ffffc90006007928 EFLAGS: 00000206 RAX: 0000000000001395 RBX: ffff888033018000 RCX: 0000000000000001 RDX: 0000000000000007 RSI: ffffffff8e257c04 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff90589237 R09: 1ffffffff20b1246 R10: dffffc0000000000 R11: fffffbfff20b1247 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x910 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:preempt_schedule_thunk+0x1/0x40 arch/x86/entry/thunk.S:12 Code: 93 00 48 c7 c0 a0 5b e0 8b e9 db 24 a8 0a cc cc 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 55 <48> 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 ca 54 a6 0a 41 RSP: 0018:ffffc90006007a48 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000296 RCX: ffffffff9a78f501 RDX: 0000000000000001 RSI: ffffffff8e257c04 RDI: 00000000ffffffff RBP: 0000000000000008 R08: ffffffff90589237 R09: 1ffffffff20b1246 R10: dffffc0000000000 R11: fffffbfff20b1247 R12: 0000000000000000 R13: ffff88807cb21000 R14: ffffffff9aa8ca90 R15: 0000000000000000 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline] _raw_spin_unlock_irqrestore+0x76/0x80 kernel/locking/spinlock.c:221 __debug_check_no_obj_freed lib/debugobjects.c:1180 [inline] debug_check_no_obj_freed+0x39e/0x450 lib/debugobjects.c:1201 __free_pages_prepare mm/page_alloc.c:1413 [inline] __free_frozen_pages+0x5cc/0xd20 mm/page_alloc.c:2950 __slab_free+0x274/0x2c0 mm/slub.c:5741 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x2a4/0x5f0 mm/slub.c:4931 lsm_inode_alloc security/security.c:254 [inline] security_inode_alloc+0x39/0x310 security/security.c:1215 inode_init_always_gfp+0x97e/0xd30 fs/inode.c:298 inode_init_always include/linux/fs.h:2951 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:345 new_inode_pseudo include/linux/fs.h:3030 [inline] sock_alloc net/socket.c:710 [inline] __sock_create+0x12d/0x9d0 net/socket.c:1640 sock_create net/socket.c:1734 [inline] __sys_socket_create net/socket.c:1771 [inline] __sys_socket+0xd6/0x1b0 net/socket.c:1818 __do_sys_socket net/socket.c:1832 [inline] __se_sys_socket net/socket.c:1830 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1830 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: 0033:0x7f744b79e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f74499f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f744ba25fa0 RCX: 00007f744b79e0d9 RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f744b835024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f744ba26038 R14: 00007f744ba25fa0 R15: 00007ffed4c061e8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6347 Comm: kworker/u8:13 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:363 [inline] RIP: 0010:smp_call_function_many_cond+0x1132/0x1500 kernel/smp.c:1002 Code: 78 44 8b 2b 44 89 ee 83 e6 01 31 ff e8 87 2b 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 72 26 0c 00 eb 35 f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 58 26 0c 00 RSP: 0018:ffffc9000c9e7740 EFLAGS: 00000293 RAX: ffffffff81bae708 RBX: ffff8880b8643388 RCX: ffff888027538000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000c9e7890 R08: ffffffff90589237 R09: 1ffffffff20b1246 R10: dffffc0000000000 R11: fffffbfff20b1247 R12: 1ffff110170c8671 R13: dffffc0000000000 R14: 1ffff11004ea72b2 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125024000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa53a155000 CR3: 000000000e946000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2602 [inline] smp_text_poke_batch_finish+0x5fd/0x1110 arch/x86/kernel/alternative.c:2812 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x240 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xab/0x290 mm/kfence/core.c:911 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa88/0x14c0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 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