watchdog: BUG: soft lockup - CPU#0 stuck for 118s! [syz.9.47:6377] Modules linked in: irq event stamp: 18439923 hardirqs last enabled at (18439922): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (18439923): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (17943650): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (17943650): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (17943650): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (17943653): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (17943653): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (17943653): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6377 Comm: syz.9.47 Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:unwind_next_frame+0x7c2/0x2390 arch/x86/kernel/unwind_orc.c:521 Code: e8 93 3f b1 00 48 8b 3b 48 85 ff 0f 84 d3 0d 00 00 48 83 c7 38 e8 0e 28 00 00 49 89 c4 48 8b 34 24 e9 a9 02 00 00 49 8d 5e 40 <48> 89 d8 48 c1 e8 03 80 3c 28 00 74 11 48 89 df e8 59 3f b1 00 48 RSP: 0000:ffffc90000007418 EFLAGS: 00000246 RAX: ffffc9000000751d RBX: ffffc90000007528 RCX: ffffffff8fb76888 RDX: ffffffff903436d2 RSI: ffffffff903436d6 RDI: ffffffff8be26ee0 RBP: dffffc0000000000 R08: 000000000000000c R09: ffffffff81727e15 R10: ffffc90000007538 R11: ffffffff81acd580 R12: ffffffff903436d7 R13: ffffc90000007538 R14: ffffc900000074e8 R15: ffffc90000007520 FS: 00007fc202a306c0(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff57ab3f68 CR3: 000000004fd10000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4248 __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:3414 [inline] dev_alloc_skb include/linux/skbuff.h:3427 [inline] __ieee80211_beacon_get+0xe32/0x1630 net/mac80211/tx.c:5458 ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5580 ieee80211_beacon_get include/net/mac80211.h:5638 [inline] mac80211_hwsim_beacon_tx+0x3ce/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2319 __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/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 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_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7104 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 0a 2b f6 e8 d6 1b 62 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0000:ffffc9000419fd80 EFLAGS: 00000282 RAX: 959c8ba328ee6000 RBX: 0000000000000000 RCX: 959c8ba328ee6000 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: 0000000000000001 RBP: ffffc9000419fe30 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000833fb0 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_count_add+0x6/0x1a0 kernel/sched/core.c:5857 Code: 24 e8 de 0e 93 00 eb 8c e9 f1 fe ff ff 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 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 20 63 a7 99 48 c1 RSP: 0000:ffffc9000419fef0 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffff88801e38bc00 RCX: 959c8ba328ee6000 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: 0000000000000001 RBP: 1ffff11003c71783 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff11003c71780 R15: ffff88801e38bc18 __schedule_loop kernel/sched/core.c:6858 [inline] schedule+0x15e/0x360 kernel/sched/core.c:6874 exit_to_user_mode_loop kernel/entry/common.c:102 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] irqentry_exit_to_user_mode+0x5d/0x120 kernel/entry/common.c:184 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7fc201b8e969 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:00007fc202a30038 EFLAGS: 00000246 RAX: 0000000000000008 RBX: 00007fc201db6080 RCX: 00007fc201b8e969 RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007fc201c10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc201db6080 R15: 00007ffdc140e698 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xf6e/0x12d0 kernel/smp.c:885 Code: 89 ee 83 e6 01 31 ff e8 60 78 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 0b 74 0b 00 eb 37 f3 90 43 0f b6 04 2c <84> c0 75 10 41 f7 07 01 00 00 00 74 1e e8 f0 73 0b 00 eb e5 44 89 RSP: 0018:ffffc900001276a0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b873cb40 RCX: ffff88801d2c8000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000127800 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 1ffff110170c86b5 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b86435a8 FS: 0000000000000000(0000) GS:ffff888125d5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3433652000 CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2660 [inline] smp_text_poke_batch_finish+0x5e0/0x1100 arch/x86/kernel/alternative.c:2870 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:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245