watchdog: BUG: soft lockup - CPU#0 stuck for 139s! [syz.0.155:6540] Modules linked in: irq event stamp: 11736635 hardirqs last enabled at (11736634): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (11736635): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (11686412): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11686412): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11686412): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11686415): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11686415): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11686415): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6540 Comm: syz.0.155 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:unwind_next_frame+0x651/0x2390 arch/x86/kernel/unwind_orc.c:517 Code: 3b 48 85 ff 0f 84 5b 10 00 00 48 83 c7 10 e9 73 01 00 00 83 fb 04 0f 84 7b 01 00 00 83 fb 05 0f 85 36 0c 00 00 48 8b 44 24 58 <80> 3c 28 00 74 11 4c 89 ff e8 91 89 af 00 48 8b 34 24 48 8b 54 24 RSP: 0018:ffffc900000073d8 EFLAGS: 00000246 RAX: 1ffff92000000e9c RBX: 0000000000000005 RCX: ffffffff901fda98 RDX: ffffffff90d0bb06 RSI: ffffffff90d0bb0a RDI: ffffffff8be28ba0 RBP: dffffc0000000000 R08: 0000000000000003 R09: ffffffff8172aae5 R10: dffffc0000000000 R11: fffff91ffff95405 R12: ffffffff90d0bb0b R13: ffffc900000074f8 R14: ffffc900000074a8 R15: ffffc900000074e0 FS: 00007f2cda5a86c0(0000) GS:ffff888125c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007b8e0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 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:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 skb_copy+0x188/0x800 net/core/skbuff.c:2125 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1871 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2222 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __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+0x286/0x870 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:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 62 ec f7 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc9001c4b79c0 EFLAGS: 00000206 RAX: abbc2eb185c81900 RBX: 1ffff92003896f40 RCX: abbc2eb185c81900 RDX: 0000000000000006 RSI: ffffffff8d996215 RDI: ffffffff8be28c00 RBP: ffffc9001c4b7ac0 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: ffffffff8e144400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] trace_call_bpf+0x5ae/0x850 kernel/trace/bpf_trace.c:148 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 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:5834 fs_reclaim_acquire+0x99/0x100 mm/page_alloc.c:4062 might_alloc include/linux/sched/mm.h:318 [inline] slab_pre_alloc_hook mm/slub.c:4099 [inline] slab_alloc_node mm/slub.c:4177 [inline] kmem_cache_alloc_noprof+0x44/0x3c0 mm/slub.c:4204 getname_flags+0xb8/0x540 fs/namei.c:146 getname include/linux/fs.h:2907 [inline] __do_sys_mkdirat fs/namei.c:4425 [inline] __se_sys_mkdirat fs/namei.c:4423 [inline] __x64_sys_mkdirat+0x7a/0xa0 fs/namei.c:4423 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: 0033:0x7f2cd978e9a9 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:00007f2cda5a8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f2cd99b5fa0 RCX: 00007f2cd978e9a9 RDX: 00000000000001ff RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007f2cd9810d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2cd99b5fa0 R15: 00007ffcfa7d31e8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6537 Comm: syz.1.153 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:debug_lockdep_rcu_enabled+0x4/0x40 kernel/rcu/update.c:319 Code: 90 0f 0b 90 90 90 eb c4 cc cc cc 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 f3 0f 1e fa <31> c0 83 3d 17 58 34 04 00 74 1e 83 3d 3a 88 34 04 00 74 15 65 48 RSP: 0018:ffffc90000a07e18 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff888054617440 RCX: ffff88802ba60000 RDX: 0000000000000100 RSI: ffffffff8be28be0 RDI: ffff888054617380 RBP: ffffc90000a07f90 R08: 0000000000000000 R09: ffffffff81f26231 R10: ffffc90000a07fe0 R11: fffff52000141003 R12: ffffc90000a07fe0 R13: dffffc0000000000 R14: ffff888054617080 R15: 1ffff92000140fd4 FS: 00007fc155c856c0(0000) GS:ffff888125d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055625db02328 CR3: 0000000075ef4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __perf_output_begin kernel/events/ring_buffer.c:174 [inline] perf_output_begin_forward+0x1a1/0xa80 kernel/events/ring_buffer.c:277 __perf_event_output kernel/events/core.c:8459 [inline] perf_event_output_forward+0x2b2/0x430 kernel/events/core.c:8477 __perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10352 perf_swevent_overflow kernel/events/core.c:10427 [inline] perf_swevent_event+0x4f8/0x5e0 kernel/events/core.c:10465 perf_tp_event+0x4f6/0x1380 kernel/events/core.c:10972 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10896 do_perf_trace_preemptirq_template include/trace/events/preemptirq.h:14 [inline] perf_trace_preemptirq_template+0x280/0x340 include/trace/events/preemptirq.h:14 __do_trace_irq_disable include/trace/events/preemptirq.h:36 [inline] trace_irq_disable+0xee/0x110 include/trace/events/preemptirq.h:36 irqentry_enter+0x3d/0x60 kernel/entry/common.c:250 sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:122 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x6a6/0xb60 kernel/locking/qspinlock.c:325 Code: 8b 44 24 40 42 0f b6 04 30 84 c0 0f 85 42 01 00 00 c6 07 00 43 0f b6 04 37 84 c0 0f 85 60 01 00 00 c6 01 01 41 be 00 80 ff ff <66> c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc90000a08780 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffffff8ed6e440 RCX: 1ffffffff1dadc88 RDX: 0000000000000100 RSI: ffffffff8d996215 RDI: ffff8880b873af14 RBP: ffffc90000a08898 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 1ffffffff1bf5338 R13: 0000000000000000 R14: 00000000ffffcde1 R15: 1ffffffff1dadc88 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline] queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116 spin_lock include/linux/spinlock.h:351 [inline] mac80211_hwsim_tx_frame_no_nl+0x718/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1822 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2222 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __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+0x286/0x870 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7109 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 3d 22 f6 e8 c6 10 59 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: 0018:ffffc9000cae7100 EFLAGS: 00000286 RAX: f5245d0abccbc800 RBX: 0000000000000000 RCX: f5245d0abccbc800 RDX: 0000000000000006 RSI: ffffffff8d996215 RDI: 0000000000000001 RBP: ffffc9000cae71b0 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200195ce20 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:__sanitizer_cov_trace_pc+0x43/0x70 kernel/kcov.c:222 Code: e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 <48> 8b 32 48 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 RSP: 0018:ffffc9000cae7278 EFLAGS: 00010246 RAX: ffffffff8133a4fe RBX: 00007fc154d8e9a9 RCX: ffff88802ba60000 RDX: ffffc90004ce2000 RSI: ffffffff8db83c98 RDI: 00007fc154d8e9a9 RBP: 0000000000000001 R08: 0000000000000022 R09: ffffffff8172aae5 R10: ffffc9000cae6f80 R11: ffffffffa0203758 R12: ffff88802ba60000 R13: ffff88801a491000 R14: dffffc0000000000 R15: 1ffff9200195ce66 in_gate_area_no_mm+0xe/0x60 arch/x86/entry/vsyscall/vsyscall_64.c:320 is_kernel_text include/linux/kallsyms.h:31 [inline] core_kernel_text kernel/extable.c:68 [inline] kernel_text_address+0x2d/0xe0 kernel/extable.c:99 __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 mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free_freelist_hook mm/slub.c:2410 [inline] slab_free_bulk mm/slub.c:4667 [inline] kmem_cache_free_bulk+0x2d1/0x520 mm/slub.c:5246 mt_free_bulk lib/maple_tree.c:191 [inline] mt_destroy_walk+0x144/0x7f0 lib/maple_tree.c:5337 mte_destroy_walk lib/maple_tree.c:5386 [inline] __mt_destroy+0x1c2/0x280 lib/maple_tree.c:6868 exit_mmap+0x69e/0xb50 mm/mmap.c:1319 __mmput+0x118/0x420 kernel/fork.c:1121 mmput kernel/fork.c:1144 [inline] dup_mm kernel/fork.c:1494 [inline] copy_mm+0x1f3/0x4b0 kernel/fork.c:1529 copy_process+0x16d3/0x3b80 kernel/fork.c:2169 kernel_clone+0x21e/0x870 kernel/fork.c:2599 __do_sys_clone kernel/fork.c:2742 [inline] __se_sys_clone kernel/fork.c:2726 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726 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: 0033:0x7fc154d8e9a9 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:00007fc155c84fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fc154fb5fa0 RCX: 00007fc154d8e9a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fc154e10d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc154fb5fa0 R15: 00007ffd14101a78