watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.2.113:6403] Modules linked in: irq event stamp: 10824051 hardirqs last enabled at (10824050): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (10824051): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (295486): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (295486): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (295486): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (295489): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (295489): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (295489): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6403 Comm: syz.2.113 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0x2fc/0x3b0 include/trace/events/lock.h:50 Code: 10 8b 94 24 80 00 00 00 4c 8b 4c 24 60 41 b8 01 00 00 00 44 89 f6 48 8b 4c 24 38 6a 00 ff 74 24 18 e8 68 1b 54 00 48 83 c4 10 <4c> 8b 64 24 20 48 c7 44 24 40 0e 36 e0 45 4b c7 04 3c 00 00 00 00 RSP: 0018:ffffc90000006340 EFLAGS: 00000282 RAX: a721c57d3d4faf00 RBX: ffffe8ffffcb5010 RCX: 0000000000000001 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000006440 R08: ffffc900000060d7 R09: 0000000000000000 R10: ffffc900000060c8 R11: fffff52000000c1b R12: ffffe8ffffcb5025 R13: 000000000000000e R14: 000000000000002c R15: dffffc0000000000 FS: 00007f56db7f66c0(0000) GS:ffff888125d27000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2c6be1cd58 CR3: 000000007b338000 CR4: 00000000003526f0 Call Trace: __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1169 [inline] unwind_next_frame+0x19a9/0x2390 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 mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4946 [inline] slab_alloc_node mm/slub.c:5245 [inline] kmem_cache_alloc_node_noprof+0x433/0x710 mm/slub.c:5297 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 skb_copy+0x188/0x800 net/core/skbuff.c:2125 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1891 mac80211_hwsim_tx+0x184c/0x2460 drivers/net/wireless/virtual/mac80211_hwsim.c:2127 drv_tx net/mac80211/driver-ops.h:38 [inline] wake_tx_push_queue net/mac80211/util.c:298 [inline] ieee80211_handle_wake_tx_queue+0x191/0x2a0 net/mac80211/util.c:315 drv_wake_tx_queue net/mac80211/driver-ops.h:1394 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1401 [inline] ieee80211_queue_skb+0x1a31/0x21c0 net/mac80211/tx.c:1662 ieee80211_tx+0x297/0x460 net/mac80211/tx.c:1966 __ieee80211_subif_start_xmit+0xccf/0x1610 net/mac80211/tx.c:4342 ieee80211_subif_start_xmit+0xe0/0x510 net/mac80211/tx.c:4538 __netdev_start_xmit include/linux/netdevice.h:5248 [inline] netdev_start_xmit include/linux/netdevice.h:5257 [inline] xmit_one net/core/dev.c:3845 [inline] dev_hard_start_xmit+0x2d4/0x830 net/core/dev.c:3861 __dev_queue_xmit+0x1b8d/0x3b50 net/core/dev.c:4763 dev_queue_xmit include/linux/netdevice.h:3365 [inline] neigh_hh_output include/net/neighbour.h:531 [inline] neigh_output include/net/neighbour.h:545 [inline] ip6_finish_output2+0xf70/0x1480 net/ipv6/ip6_output.c:136 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x283/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 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:128 [inline] RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:751 Code: e8 2b cd a1 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd d0 5d a0 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 ec 58 7f 00 48 c7 c3 d8 bf 90 92 49 03 1e 48 89 RSP: 0018:ffffc9000bda6c98 EFLAGS: 00000246 RAX: 1ffffffff1b40bba RBX: 0000000000000000 RCX: a721c57d3d4faf00 RDX: 0000000000000000 RSI: ffffffff8bc060c0 RDI: ffffffff8bc06080 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8172ad45 R10: ffffc9000bda68c8 R11: ffffffff81ab4d30 R12: 1ffff920017b4db1 R13: ffffc9000bda6dc0 R14: ffffffff8da05dd0 R15: dffffc0000000000 rcu_read_lock include/linux/rcupdate.h:842 [inline] class_rcu_constructor include/linux/rcupdate.h:1169 [inline] unwind_next_frame+0xd4/0x2390 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 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __set_page_owner+0x8d/0x4a0 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 ___kmalloc_large_node+0x5f/0x1b0 mm/slub.c:5544 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5575 __do_kmalloc_node mm/slub.c:5591 [inline] __kmalloc_node_track_caller_noprof+0x133/0x800 mm/slub.c:5712 kmalloc_reserve+0x136/0x290 net/core/skbuff.c:601 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb_fclone include/linux/skbuff.h:1433 [inline] tipc_buf_acquire net/tipc/msg.c:72 [inline] tipc_msg_build+0x13b/0xcf0 net/tipc/msg.c:390 __tipc_sendstream+0x8ac/0x1290 net/tipc/socket.c:1615 tipc_sendstream+0x55/0x70 net/tipc/socket.c:1546 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f56dd58eec9 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:00007f56db7f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f56dd7e5fa0 RCX: 00007f56dd58eec9 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000007 RBP: 00007f56dd611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f56dd7e6038 R14: 00007f56dd7e5fa0 R15: 00007ffd46357958 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6414 Comm: syz.4.117 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:perf_trace_lock_acquire+0xa/0x410 include/trace/events/lock.h:24 Code: ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 44 89 44 24 RSP: 0018:ffffc90000a07d28 EFLAGS: 00000086 RAX: ffff888058287d90 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8e13b260 RDI: ffffffff8e009f80 RBP: ffffc90000a07d30 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000a07b48 R11: fffff52000140f6b R12: 0000000000000002 R13: ffffffff8e13b260 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb4007bd6c0(0000) GS:ffff888125e27000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555929ed5c8 CR3: 0000000027efe000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __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:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] __task_pid_nr_ns+0x48/0x490 kernel/pid.c:515 perf_event_pid_type kernel/events/core.c:1431 [inline] perf_event_pid kernel/events/core.c:1440 [inline] __perf_event_header__init_id+0x109/0x480 kernel/events/core.c:7703 perf_prepare_sample+0x135/0x2450 kernel/events/core.c:8256 __perf_event_output kernel/events/core.c:8495 [inline] perf_event_output_forward+0x151/0x430 kernel/events/core.c:8516 __perf_event_overflow+0x82d/0xe40 kernel/events/core.c:10392 perf_swevent_hrtimer+0x3b8/0x500 kernel/events/core.c:11786 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:124 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x6c3/0xb60 kernel/locking/qspinlock.c:325 Code: 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 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 RSP: 0018:ffffc90000a08780 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffffff8ed3b1c0 RCX: 1ffffffff1da7638 RDX: 0000000000000100 RSI: ffffffff8d7e3703 RDI: ffff8880b873af94 RBP: ffffc90000a08898 R08: ffffffff8f9db437 R09: 1ffffffff1f3b686 R10: dffffc0000000000 R11: fffffbfff1f3b687 R12: 1ffffffff1bf4d7c R13: 0000000000000000 R14: 00000000ffffe874 R15: 1ffffffff1da7638 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:1842 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2258 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2359 __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/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2389 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1858 handle_softirqs+0x283/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:98 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0x9b/0x2c0 mm/kasan/generic.c:200 Code: 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb <41> 80 3b 00 0f 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 RSP: 0018:ffffc9000b9c7728 EFLAGS: 00000286 RAX: f2f200f2f2f2f201 RBX: ffffffffffffffff RCX: ffffffff8b47f809 RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc9000b9c7910 RBP: 0000000000000000 R08: ffffc9000b9c791f R09: 1ffff92001738f23 R10: dffffc0000000000 R11: fffff52001738f23 R12: 0000000000000002 R13: 0000000000000001 R14: fffff52001738f24 R15: 1ffff92001738f22 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 __schedule+0xb9/0x4cc0 kernel/sched/core.c:6795 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:put_cpu_partial+0x234/0x2e0 mm/slub.c:3922 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 e9 e7 fe ff ff e8 09 e2 2c 09 41 f7 c5 00 02 00 00 74 b2 fb 4d 85 ff <75> b1 eb ba e8 f3 e1 2c 09 e9 4f fe ff ff 90 0f 0b 90 e9 66 ff ff RSP: 0018:ffffc9000b9c7b00 EFLAGS: 00000246 RAX: ea942e1a468c6200 RBX: ffff88813ffa7140 RCX: ea942e1a468c6200 RDX: 0000000000000007 RSI: ffffffff8d7e3703 RDI: ffffffff8bc060e0 RBP: 0000000000000001 R08: ffffffff8f9db437 R09: 1ffffffff1f3b686 R10: dffffc0000000000 R11: fffffbfff1f3b687 R12: 0000000000000001 R13: 0000000000000286 R14: ffff8880b873e850 R15: 0000000000000000 __slab_free+0x2b9/0x390 mm/slub.c:5882 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4946 [inline] slab_alloc_node mm/slub.c:5245 [inline] __do_kmalloc_node mm/slub.c:5602 [inline] __kmalloc_noprof+0x3c3/0x7f0 mm/slub.c:5615 kmalloc_noprof include/linux/slab.h:961 [inline] sk_prot_alloc+0xe7/0x220 net/core/sock.c:2239 sk_alloc+0x3a/0x370 net/core/sock.c:2295 __netlink_create+0x65/0x260 net/netlink/af_netlink.c:628 netlink_create+0x3ca/0x590 net/netlink/af_netlink.c:686 __sock_create+0x4b0/0x9f0 net/socket.c:1605 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1747 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb3ff98eec9 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:00007fb4007bd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fb3ffbe5fa0 RCX: 00007fb3ff98eec9 RDX: 000000000000000c RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007fb3ffa11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb3ffbe6038 R14: 00007fb3ffbe5fa0 R15: 00007ffe31cb0808