watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [modprobe:11407] Modules linked in: irq event stamp: 65007 hardirqs last enabled at (65006): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (65007): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (3844): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (3844): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (3844): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (4579): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (4579): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (4579): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 11407 Comm: modprobe Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x6ce/0xb60 kernel/locking/qspinlock.c:325 Code: ff ff 66 c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 0f b6 04 01 84 c0 75 46 80 3b 00 74 09 f3 90 <41> ff c6 75 d3 eb 4b 48 89 df be 02 00 00 00 e8 2e 1d a6 f6 48 8d RSP: 0018:ffffc90000007780 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffffff8ed75f00 RCX: 1ffffffff1daebe0 RDX: 0000000000000100 RSI: ffffffff8d9baf27 RDI: ffff8880b863af14 RBP: ffffc90000007898 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6 R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 1ffffffff1bf4e5c R13: 0000000000000000 R14: 00000000ffff8602 R15: 1ffffffff1daebe0 FS: 0000000000000000(0000) GS:ffff888125c11000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3aef6e3e9c CR3: 0000000067c22000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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+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:rcu_is_watching_curr_cpu include/linux/context_tracking.h:-1 [inline] RIP: 0010:rcu_is_watching+0x44/0xb0 kernel/rcu/tree.c:751 Code: 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 10 2d be 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 3c 74 7d 00 <48> c7 c3 98 1f a2 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 RSP: 0018:ffffc9000c59f418 EFLAGS: 00000246 RAX: 1ffffffff1b7c5a2 RBX: 0000000000000000 RCX: 5132d61357dc0500 RDX: ffffc9000c59f501 RSI: ffffffff8be34460 RDI: ffffffff8be34420 RBP: dffffc0000000000 R08: ffffc9000c59fc18 R09: 0000000000000000 R10: ffffc9000c59f558 R11: fffff520018b3ead R12: ffffc9000c59fc28 R13: ffffc9000c598000 R14: ffffffff8dbe2d10 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1169 [inline] unwind_next_frame+0x1965/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 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 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243 slab_free_hook mm/slub.c:2386 [inline] slab_free mm/slub.c:4695 [inline] kmem_cache_free+0x309/0x400 mm/slub.c:4797 exit_mmap+0x53f/0xb50 mm/mmap.c:1305 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1da/0x2c0 kernel/exit.c:582 do_exit+0x648/0x2300 kernel/exit.c:949 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111 x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7f3aef8426c5 Code: Unable to access opcode bytes at 0x7f3aef84269b. RSP: 002b:00007ffe60f9a608 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f3aef943fe8 RCX: 00007f3aef8426c5 RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000001 RBP: 0000000000000001 R08: 00007ffe60f9a598 R09: 0000000000000000 R10: 00007ffe60f9a430 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f3aef942680 R15: 00007f3aef944000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 11410 Comm: syz.8.1437 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:mark_usage kernel/locking/lockdep.c:4674 [inline] RIP: 0010:__lock_acquire+0x69b/0xd20 kernel/locking/lockdep.c:5191 Code: 3c 24 4c 89 f6 ba 04 00 00 00 e8 b0 25 00 00 48 8b 3c 24 85 c0 0f 84 19 06 00 00 41 8b 46 20 a9 00 00 18 00 0f 84 b3 00 00 00 <4c> 89 f6 ba 08 00 00 00 e8 88 25 00 00 45 31 ff 85 c0 0f 84 f5 05 RSP: 0018:ffffc90000a07950 EFLAGS: 00000006 RAX: 00000000000c6070 RBX: 0000000000000003 RCX: ffffffff934a0a90 RDX: 0000000000000004 RSI: ffff88802edac790 RDI: ffff88802edabc00 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81adabcb R10: dffffc0000000000 R11: ffffed10170e4f51 R12: 0000000000000003 R13: 0000000000000002 R14: ffff88802edac790 R15: 0000000000000000 FS: 00007f0bc40eb6c0(0000) GS:ffff888125d11000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c34adbf CR3: 0000000058210000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 lock_hrtimer_base kernel/time/hrtimer.c:171 [inline] hrtimer_try_to_cancel+0x22b/0x420 kernel/time/hrtimer.c:1362 hrtimer_cancel+0x3b/0x50 kernel/time/hrtimer.c:1488 perf_swevent_cancel_hrtimer kernel/events/core.c:11817 [inline] cpu_clock_event_stop+0xd9/0x130 kernel/events/core.c:11867 __perf_event_overflow+0x580/0xe40 kernel/events/core.c:10333 perf_swevent_hrtimer+0x3c5/0x550 kernel/events/core.c:11773 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b 7b 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a082d8 EFLAGS: 00000206 RAX: 5ffcc1ae8d9f3700 RBX: 0000000000000000 RCX: 5ffcc1ae8d9f3700 RDX: 0000000000000000 RSI: ffffffff8dbaa5db RDI: ffffffff8be34480 RBP: ffffffff8172d195 R08: 0000000000000000 R09: ffffffff8172d195 R10: ffffc90000a08498 R11: ffffffff81ac5140 R12: 0000000000000002 R13: ffffffff8e13a160 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1169 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 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:330 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4191 [inline] slab_alloc_node mm/slub.c:4240 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4292 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:578 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:669 skb_copy+0x188/0x800 net/core/skbuff.c:2124 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+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:lock_release+0x2b5/0x3e0 kernel/locking/lockdep.c:5893 Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 cb 68 03 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000c7b7bd0 EFLAGS: 00000206 RAX: 5ffcc1ae8d9f3700 RBX: 0000000000000202 RCX: 5ffcc1ae8d9f3700 RDX: 0000000000000001 RSI: ffffffff8dbaa5db RDI: ffffffff8be34480 RBP: ffff88802edac718 R08: 0000000000000000 R09: ffffffff822c9ed5 R10: 000000000000000a R11: ffffffff81ac5140 R12: 0000000000000001 R13: 0000000000000001 R14: ffffffff8e13a160 R15: ffff88802edabc00 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline] percpu_ref_tryget+0xf8/0x180 include/linux/percpu-refcount.h:266 css_tryget include/linux/cgroup_refcnt.h:45 [inline] get_mem_cgroup_from_objcg+0x108/0x1d0 include/linux/memcontrol.h:511 __memcg_slab_post_alloc_hook+0x12a/0x7f0 mm/memcontrol.c:3162 memcg_slab_post_alloc_hook mm/slub.c:2221 [inline] slab_post_alloc_hook mm/slub.c:4201 [inline] slab_alloc_node mm/slub.c:4240 [inline] kmem_cache_alloc_lru_noprof+0x2c7/0x3d0 mm/slub.c:4259 sock_alloc_inode+0x28/0xc0 net/socket.c:309 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode_pseudo include/linux/fs.h:3392 [inline] sock_alloc net/socket.c:624 [inline] __sock_create+0x12d/0x9f0 net/socket.c:1553 sock_create net/socket.c:1647 [inline] __sys_socket_create net/socket.c:1684 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1731 __do_sys_socket net/socket.c:1745 [inline] __se_sys_socket net/socket.c:1743 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1743 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: 0033:0x7f0bc318eec9 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:00007f0bc40eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f0bc33e5fa0 RCX: 00007f0bc318eec9 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000010 RBP: 00007f0bc3211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0bc33e6038 R14: 00007f0bc33e5fa0 R15: 00007fff4b432a28