watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.7.419:7482] Modules linked in: irq event stamp: 14481631 hardirqs last enabled at (14481630): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (14481631): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (78544): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (78544): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (78544): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (78547): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (78547): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (78547): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 7482 Comm: syz.7.419 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 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 9b ba d0 10 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a08450 EFLAGS: 00000206 RAX: 2319648e564d0c00 RBX: 0000000000000206 RCX: 2319648e564d0c00 RDX: 0000000000000005 RSI: ffffffff8d8f277e RDI: ffffffff8bbf0460 RBP: ffff8880624166b8 R08: ffffc90000a085e7 R09: 0000000000000000 R10: ffffc90000a085d8 R11: fffff520001410bd R12: 0000000000000005 R13: 0000000000000005 R14: ffffffff8df3d2e0 R15: ffff888062415ac0 FS: 00007f81de15f6c0(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c337f40 CR3: 0000000031b2c000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [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 ref_tracker_alloc+0x17d/0x460 lib/ref_tracker.c:277 __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline] netdev_hold include/linux/netdevice.h:4404 [inline] dst_init+0xd9/0x450 net/core/dst.c:52 dst_alloc+0x12a/0x170 net/core/dst.c:93 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x420 net/ipv6/route.c:3322 ndisc_send_skb+0x3f1/0x1510 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/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+0x286/0x870 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:697 RIP: 0010:profile_hit include/linux/profile.h:50 [inline] RIP: 0010:schedule_debug kernel/sched/core.c:5908 [inline] RIP: 0010:__schedule+0x2ed/0x4cc0 kernel/sched/core.c:6806 Code: 56 f6 4c 89 74 24 18 4c 89 7c 24 30 0f 1f 44 00 00 48 c7 c0 20 d6 7c 8f 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 0f 85 8c 17 00 00 83 3d f4 fb 35 04 02 0f 84 b0 15 00 00 0f RSP: 0018:ffffc9000550f6c0 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffc90005508000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8d8f277e RDI: ffffffff8bbf0460 RBP: ffffc9000550f8d0 R08: ffffffff8f7cd477 R09: 1ffffffff1ef9a8e R10: dffffc0000000000 R11: fffffbfff1ef9a8f R12: ffff88812623e000 R13: 0000000000000001 R14: ffff888062415ac0 R15: 1ffff11017127568 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:697 RIP: 0010:preempt_schedule+0x0/0xc0 kernel/sched/core.c:7130 Code: 00 00 e8 d3 c7 48 f6 c3 cc cc cc cc cc 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 0f 1e fa 55 48 89 e5 41 56 53 48 83 e4 e0 48 83 ec 60 65 48 8b RSP: 0018:ffffc9000550fa40 EFLAGS: 00000283 RAX: ffffffff81b47e9b RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000d436000 RSI: 0000000000004f51 RDI: 0000000000004f52 RBP: ffffc9000550fa90 R08: ffffffff8f7cd477 R09: 1ffffffff1ef9a8e R10: dffffc0000000000 R11: fffffbfff1ef9a8f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff92000aa1f58 R15: 1ffff92000aa1f58 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 smp_call_function_single+0x470/0x590 kernel/smp.c:689 task_function_call kernel/events/core.c:121 [inline] perf_install_in_context+0x593/0x8f0 kernel/events/core.c:3107 __do_sys_perf_event_open kernel/events/core.c:13735 [inline] __se_sys_perf_event_open+0x193a/0x1d70 kernel/events/core.c:13377 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: 0033:0x7f81dd38efc9 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:00007f81de15f038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f81dd5e5fa0 RCX: 00007f81dd38efc9 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000200000000040 RBP: 00007f81dd411f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f81dd5e6038 R14: 00007f81dd5e5fa0 R15: 00007ffdad4a0038 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7462 Comm: syz.3.413 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__lock_release kernel/locking/lockdep.c:5514 [inline] RIP: 0010:lock_release+0xc3/0x3e0 kernel/locking/lockdep.c:5889 Code: 02 00 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 48 8b 5c 24 20 fa 48 c7 c7 23 00 72 8d e8 d4 b8 a8 09 65 ff 05 dd fc d0 10 44 24 20 01 00 00 00 83 3d ee a0 df 0d 00 0f 84 96 01 00 00 41 RSP: 0018:ffffc90000006018 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 0000000000000006 RCX: ad164d8af5d43f00 RDX: 0000000000000000 RSI: ffffffff8d720023 RDI: ffffffff8bbf0460 RBP: ffffc90000006138 R08: 0000000000000000 R09: ffffffff81adf5f5 R10: ffffc90000005c48 R11: fffff52000000b8b R12: dffffc0000000000 R13: ffffffff81adf5f5 R14: ffffffff997da3c8 R15: ffff88802e670000 FS: 00007fbecec416c0(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555a9e15c8 CR3: 0000000078f20000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: seqcount_lockdep_reader_access+0xde/0x1c0 include/linux/seqlock.h:73 ktime_get+0x45/0x200 kernel/time/timekeeping.c:824 hrtimer_forward_now include/linux/hrtimer.h:362 [inline] perf_swevent_hrtimer+0x3f8/0x500 kernel/events/core.c:11791 __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+0x10b/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:697 RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:202 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:232 [inline] RIP: 0010:tif_test_bit include/linux/thread_info.h:192 [inline] RIP: 0010:tif_need_resched include/linux/thread_info.h:208 [inline] RIP: 0010:tracing_gen_ctx_irq_test+0x99/0x160 kernel/trace/trace.c:2604 Code: 00 44 0f 44 e8 31 ff e8 25 ba fb ff 65 4c 8b 3c 25 08 20 6e 92 4c 89 fb 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df 80 3c 03 00 <74> 08 4c 89 ff e8 dd 6a 61 00 49 8b 07 c1 e8 02 83 e0 04 41 09 c5 RSP: 0018:ffffc90000006748 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff11005cce000 RCX: 0000000000000100 RDX: ffff88802e670000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffc90000006a0f R09: 0000000000000000 R10: ffffc90000006a00 R11: fffff52000000d42 R12: 0000000000000102 R13: 0000000000000010 R14: 0000000000000000 R15: ffff88802e670000 tracing_gen_ctx_flags include/linux/trace_events.h:200 [inline] tracing_gen_ctx include/linux/trace_events.h:207 [inline] perf_trace_buf_update+0x9f/0x220 kernel/trace/trace_event_perf.c:429 perf_tp_event+0xf6/0x1380 kernel/events/core.c:10998 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10936 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:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:417 kasan_kmalloc include/linux/kasan.h:262 [inline] __do_kmalloc_node mm/slub.c:5634 [inline] __kmalloc_noprof+0x411/0x7f0 mm/slub.c:5646 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] cfg80211_inform_single_bss_data+0x905/0x1ac0 net/wireless/scan.c:2357 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3240 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3331 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5194 [inline] ieee80211_rx_list+0x210c/0x2b90 net/mac80211/rx.c:5447 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5470 ieee80211_rx include/net/mac80211.h:5214 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x36c/0x580 kernel/softirq.c:925 handle_softirqs+0x286/0x870 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:697 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 9b ba d0 10 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000bbfecf8 EFLAGS: 00000206 RAX: ad164d8af5d43f00 RBX: 0000000000000206 RCX: ad164d8af5d43f00 RDX: 0000000000000004 RSI: ffffffff8d8f277e RDI: ffffffff8bbf0460 RBP: ffff88802e670bd0 R08: ffff88801bca9dd7 R09: 1ffff110037953ba R10: dffffc0000000000 R11: ffffed10037953bb R12: 0000000000000004 R13: 0000000000000004 R14: ffffffff8df3d2e0 R15: ffff88802e670000 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] __update_page_owner_handle+0x51a/0x570 mm/page_owner.c:258 __set_page_owner+0x10b/0x4a0 mm/page_owner.c:330 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 alloc_frozen_pages_noprof mm/mempolicy.c:2487 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2507 get_free_pages_noprof+0xf/0x80 mm/page_alloc.c:5242 tlb_next_batch mm/mmu_gather.c:35 [inline] __tlb_remove_folio_pages_size+0x2e0/0x5a0 mm/mmu_gather.c:196 zap_present_folio_ptes mm/memory.c:1656 [inline] zap_present_ptes mm/memory.c:1709 [inline] do_zap_pte_range mm/memory.c:1810 [inline] zap_pte_range mm/memory.c:1854 [inline] zap_pmd_range mm/memory.c:1946 [inline] zap_pud_range mm/memory.c:1975 [inline] zap_p4d_range mm/memory.c:1996 [inline] unmap_page_range+0x20ac/0x4370 mm/memory.c:2017 unmap_single_vma mm/memory.c:2060 [inline] unmap_vmas+0x399/0x580 mm/memory.c:2104 exit_mmap+0x240/0xb40 mm/mmap.c:1280 __mmput+0x118/0x430 kernel/fork.c:1133 mmput kernel/fork.c:1156 [inline] dup_mm kernel/fork.c:1506 [inline] copy_mm+0x1f3/0x4b0 kernel/fork.c:1541 copy_process+0x1706/0x3c00 kernel/fork.c:2181 kernel_clone+0x21e/0x840 kernel/fork.c:2609 __do_sys_clone kernel/fork.c:2750 [inline] __se_sys_clone kernel/fork.c:2734 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734 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: 0033:0x7fbecdd8efc9 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:00007fbecec40fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fbecdfe5fa0 RCX: 00007fbecdd8efc9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000001e48c9600 RBP: 00007fbecde11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fbecdfe6038 R14: 00007fbecdfe5fa0 R15: 00007ffebff11be8