watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.1.9132:10740] Modules linked in: irq event stamp: 13353041 hardirqs last enabled at (13353040): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13353041): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (8969200): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (8969200): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (8969200): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (8969203): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (8969203): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (8969203): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 10740 Comm: syz.1.9132 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:229 [inline] RIP: 0010:unwind_next_frame+0x223/0x23c0 arch/x86/kernel/unwind_orc.c:510 Code: 86 78 04 00 00 44 89 f8 4c 8d 2c 85 cc 7f 52 91 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 48 89 eb 0f 85 25 1c 00 00 45 8b 6d 00 <44> 89 f8 ff c0 48 8d 2c 85 cc 7f 52 91 48 89 e8 48 c1 e8 03 0f b6 RSP: 0018:ffffc90000006a98 EFLAGS: 00000246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000300 RDX: 00000000000ab13c RSI: ffffffff8c27ae60 RDI: ffffffff8c27ae20 RBP: dffffc0000000000 R08: ffffffff81767a45 R09: ffffffff8e7602e0 R10: ffffc90000006688 R11: fffff52000000cd3 R12: ffffffff8187fe2e R13: 000000000001a2f3 R14: ffffc90000006b68 R15: 00000000000087fe FS: 00007f0c5973c6c0(0000) GS:ffff888125464000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb10a1e9078 CR3: 000000005c2f6000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5238 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] ieee802_11_parse_elems_full+0x159/0x2ab0 net/mac80211/parse.c:1051 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2480 [inline] ieee80211_inform_bss+0x161/0x1160 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd08/0x1b70 net/wireless/scan.c:2372 cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x3c7/0x760 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5305 [inline] ieee80211_rx_list+0x29e5/0x3710 net/mac80211/rx.c:5588 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194 Code: f7 e8 8d 18 f2 f5 f7 c3 00 02 00 00 74 05 e8 50 6a 1d f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 44 d7 e3 f5 65 8b 05 0d b0 6b 07 85 c0 74 18 5b 41 5e c3 cc cc RSP: 0018:ffffc9000570f4a0 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000296 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8def311b RDI: 0000000000000001 RBP: ffff888095bafb40 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: ffff888095bafb38 R13: ffff888095bafb28 R14: ffffffff9a56ab90 R15: 1ffff11012b75f67 debug_object_activate+0x320/0x580 lib/debugobjects.c:853 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline] __call_rcu_common kernel/rcu/tree.c:3116 [inline] call_rcu+0x43/0x890 kernel/rcu/tree.c:3251 thread_stack_delayed_free kernel/fork.c:288 [inline] free_thread_stack kernel/fork.c:380 [inline] release_task_stack kernel/fork.c:518 [inline] put_task_stack+0x133/0x1c0 kernel/fork.c:525 finish_task_switch+0x4b7/0x920 kernel/sched/core.c:5193 context_switch kernel/sched/core.c:5298 [inline] __schedule+0x15e5/0x52d0 kernel/sched/core.c:6908 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d f4 29 55 0c 48 89 de 5b e9 c3 8e 5e 00 cc cc cc 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 0d 18 2a 56 11 65 8b 15 39 2a 56 11 81 e2 00 01 ff 00 74 RSP: 0018:ffffc9000570f970 EFLAGS: 00000286 RAX: ffffffff84697cf8 RBX: 0000000000000002 RCX: 0000000000080000 RDX: ffffc900221d4000 RSI: 0000000000002444 RDI: 0000000000002445 RBP: 0000000000000000 R08: ffff888027051e80 R09: 0000000000000003 R10: 000000000000000a R11: 0000000000000002 R12: ffffc9000570fde0 R13: 1ffff92000ae1f48 R14: ffffffff8c20aee0 R15: ffff888057a69700 aa_sock_msg_perm+0x28/0x1b0 security/apparmor/lsm.c:1415 security_socket_sendmsg+0xc0/0x280 security/security.c:4210 __sock_sendmsg net/socket.c:739 [inline] ____sys_sendmsg+0x584/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0c5879c799 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:00007f0c5973c028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0c58a15fa0 RCX: 00007f0c5879c799 RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000008 RBP: 00007f0c58832bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0c58a16038 R14: 00007f0c58a15fa0 R15: 00007ffd17c8c948 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 21902 Comm: kworker/u8:60 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x70 kernel/kcov.c:217 Code: 18 2a 56 11 65 8b 15 39 2a 56 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 94 16 00 00 00 74 2c 8b 91 70 16 00 00 <83> fa 02 75 21 48 8b 91 78 16 00 00 48 8b 32 48 8d 7e 01 8b 89 74 RSP: 0018:ffffc90003b17718 EFLAGS: 00000246 RAX: ffffffff81b9b7dd RBX: 1ffff110170c8515 RCX: ffff888026f01e80 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003b17860 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: ffff8880b86428a8 R13: dffffc0000000000 R14: ffff8880b873bf80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125564000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb10a1ea4b8 CR3: 000000000e54c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0xcfd/0x12c0 kernel/smp.c:877 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2761 [inline] smp_text_poke_batch_finish+0x5f5/0x1160 arch/x86/kernel/alternative.c:2971 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:900 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245