watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.3.65:6117] Modules linked in: irq event stamp: 17580003 hardirqs last enabled at (17580002): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (17580003): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (17531330): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (17531330): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (17531330): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (17531333): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (17531333): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (17531333): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6117 Comm: syz.3.65 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:strlen+0x2e/0x70 lib/string.c:420 Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89 RSP: 0018:ffffc90000a08a18 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffffffff8c79f240 RCX: ffff888030d80000 RDX: ffffffff81add6ce RSI: ffffc90000a08be0 RDI: ffffffff8c79f240 RBP: ffffc90000a08b28 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 1ffff92000141150 R13: ffffffff81add6ce R14: dffffc0000000000 R15: ffffffffffffffff FS: 00007f85915f66c0(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000f90000 CR3: 00000000328f6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: _Z16__fortify_strlenPKcU25pass_dynamic_object_size1 include/linux/fortify-string.h:268 [inline] trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline] do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0xc2/0x3b0 include/trace/events/lock.h:50 __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:5877 call_timer_fn+0x224/0x5f0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0x103/0x180 kernel/time/timer.c:2446 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:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5250 Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 ff 83 c6 09 e8 6a 66 35 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000bd474d8 EFLAGS: 00000286 RAX: 1637f60976b3a900 RBX: 0000000000000000 RCX: 1637f60976b3a900 RDX: 0000000000000006 RSI: ffffffff8d749f78 RDI: ffffffff8bc1cde0 RBP: ffffc9000bd47530 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: ffff888030d80000 R13: dffffc0000000000 R14: ffff8880274fda00 R15: ffff8880b893a6d8 context_switch kernel/sched/core.c:5385 [inline] __schedule+0x16ea/0x4cd0 kernel/sched/core.c:6767 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline] RIP: 0010:lock_release+0xaa/0x3e0 kernel/locking/lockdep.c:5883 Code: 92 41 83 bf ec 0a 00 00 00 0f 85 1e 02 00 00 49 81 3e f0 d6 38 93 0f 84 11 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 d3 d4 75 8d e8 44 d5 b7 09 65 ff 05 8d RSP: 0018:ffffc9000bd478d0 EFLAGS: 00000287 RAX: 0000000000000000 RBX: ffffffff821731f0 RCX: 1637f60976b3a900 RDX: ffffffff821731f0 RSI: ffffffff8bc1cdc0 RDI: ffffffff8bc1cd80 RBP: ffffffff818179fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8214b23d R12: ffff88801a041780 R13: ffffffff821731f0 R14: ffffffff8e042c40 R15: ffff888030d80000 might_alloc include/linux/sched/mm.h:319 [inline] slab_pre_alloc_hook mm/slub.c:4112 [inline] slab_alloc_node mm/slub.c:4190 [inline] __do_kmalloc_node mm/slub.c:4340 [inline] __kvmalloc_node_noprof+0x140/0x5e0 mm/slub.c:5026 kvmalloc_array_node_noprof include/linux/slab.h:1065 [inline] bpf_int_jit_compile+0x5ae/0x1450 arch/x86/net/bpf_jit_comp.c:3570 bpf_prog_select_runtime+0x49e/0x810 kernel/bpf/core.c:2494 bpf_prog_load+0x1343/0x1930 kernel/bpf/syscall.c:2975 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f859378e969 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:00007f85915f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f85939b5fa0 RCX: 00007f859378e969 RDX: 0000000000000094 RSI: 0000200000000280 RDI: 0000000000000005 RBP: 00007f8593810ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f85939b5fa0 R15: 00007ffd051c6568 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6106 Comm: syz.4.62 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:preempt_count_sub+0x4e/0x170 kernel/sched/core.c:5889 Code: 00 00 00 83 3d 32 a8 ef 17 00 75 25 65 8b 05 b9 81 e4 10 89 c1 81 e1 ff ff ff 7f 39 cf 7f 2a 81 ff ff 00 00 00 0f 93 c1 84 c0 <0f> 95 c0 08 c8 74 5e 65 8b 05 94 81 e4 10 f7 df 65 01 3d 8b 81 e4 RSP: 0018:ffffc90000004fa0 EFLAGS: 00000006 RAX: 0000000000010306 RBX: dffffc0000000000 RCX: 0000000000010300 RDX: 0000000000010100 RSI: ffffffff8b61a8a0 RDI: 0000000000000001 RBP: ffffc900000050d0 R08: 0000000000000000 R09: 0000000000080000 R10: 0000000000000000 R11: ffffffff81eebeef R12: ffff8880275f9f90 R13: 1ffff11004ebf3f2 R14: 0000000000000000 R15: ffffc90000005480 FS: 0000000000000000(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f743f2e56e8 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_get_running_vcpu virt/kvm/kvm_main.c:6317 [inline] kvm_guest_state+0x3a/0x150 virt/kvm/kvm_main.c:6334 perf_guest_state include/linux/perf_event.h:1615 [inline] should_sample_guest kernel/events/core.c:7277 [inline] perf_instruction_pointer kernel/events/core.c:7292 [inline] perf_prepare_sample+0x1d3/0x21e0 kernel/events/core.c:8116 __perf_event_output kernel/events/core.c:8352 [inline] perf_event_output_forward+0x151/0x430 kernel/events/core.c:8373 __perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10249 perf_swevent_overflow kernel/events/core.c:10324 [inline] perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1 perf_tp_event+0x4f6/0x1380 kernel/events/core.c:10869 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10793 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __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:5877 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock+0x93/0xa0 include/linux/rcupdate.h:871 __perf_output_begin kernel/events/ring_buffer.c:268 [inline] perf_output_begin_forward+0x9bc/0xa80 kernel/events/ring_buffer.c:277 __perf_event_output kernel/events/core.c:8355 [inline] perf_event_output_forward+0x2b2/0x430 kernel/events/core.c:8373 __perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10249 perf_swevent_hrtimer+0x3c2/0x540 kernel/events/core.c:11613 __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:1038 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline] RIP: 0010:lock_acquire+0xa9/0x360 kernel/locking/lockdep.c:5842 Code: b4 24 90 00 00 00 4c 89 ef e8 e3 80 83 00 83 3d fc f5 e0 0d 00 0f 84 fa 00 00 00 65 8b 05 df 6f d7 10 85 c0 0f 85 eb 00 00 00 <65> 48 8b 04 25 08 40 75 92 83 b8 ec 0a 00 00 00 0f 85 d5 00 00 00 RSP: 0018:ffffc90000006200 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 029cde90e8d92700 RDX: 0000000000000000 RSI: ffffffff81f2f00d RDI: 1ffffffff1be770c RBP: ffffffff81f2eff1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90000006460 R11: fffff52000000c93 R12: 0000000000000002 R13: ffffffff8df3b860 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] __perf_output_begin kernel/events/ring_buffer.c:167 [inline] perf_output_begin_forward+0xcd/0xa80 kernel/events/ring_buffer.c:277 __perf_event_output kernel/events/core.c:8355 [inline] perf_event_output_forward+0x2b2/0x430 kernel/events/core.c:8373 __perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10249 perf_swevent_overflow kernel/events/core.c:10324 [inline] perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1 perf_tp_event+0x4f6/0x1380 kernel/events/core.c:10869 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10793 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __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:5877 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:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 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:2398 [inline] slab_free mm/slub.c:4656 [inline] kfree+0x193/0x440 mm/slub.c:4855 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd02/0x1ac0 net/wireless/scan.c:2367 cfg80211_inform_bss_data+0x1f6/0x3ad0 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x362/0x700 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x527/0x9b0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5179 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5416 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5439 ieee80211_rx include/net/mac80211.h:5179 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 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:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870 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 eb 32 d7 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000bd0ea40 EFLAGS: 00000206 RAX: 029cde90e8d92700 RBX: 0000000000000000 RCX: 029cde90e8d92700 RDX: 0000000000000000 RSI: ffffffff8d9350da RDI: ffffffff8bc1cde0 RBP: ffffffff81f2eff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81f2eff1 R12: 0000000000000002 R13: ffffffff8df3b860 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] __perf_output_begin kernel/events/ring_buffer.c:167 [inline] perf_output_begin_forward+0xcd/0xa80 kernel/events/ring_buffer.c:277 __perf_event_output kernel/events/core.c:8355 [inline] perf_event_output_forward+0x2b2/0x430 kernel/events/core.c:8373 __perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10249 perf_swevent_overflow kernel/events/core.c:10324 [inline] perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1 perf_tp_event+0x4f6/0x1380 kernel/events/core.c:10869 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10793 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __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:5877 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] page_table_check_clear+0x4b0/0x6e0 mm/page_table_check.c:89 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline] get_and_clear_full_ptes include/linux/pgtable.h:714 [inline] zap_present_folio_ptes mm/memory.c:1501 [inline] zap_present_ptes mm/memory.c:1586 [inline] do_zap_pte_range mm/memory.c:1687 [inline] zap_pte_range mm/memory.c:1731 [inline] zap_pmd_range mm/memory.c:1823 [inline] zap_pud_range mm/memory.c:1852 [inline] zap_p4d_range mm/memory.c:1873 [inline] unmap_page_range+0x30be/0x4210 mm/memory.c:1894 unmap_vmas+0x25d/0x3c0 mm/memory.c:1984 exit_mmap+0x245/0xba0 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1379 exit_mm+0x1da/0x2c0 kernel/exit.c:589 do_exit+0x859/0x2550 kernel/exit.c:940 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x125e/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa021b8e969 Code: Unable to access opcode bytes at 0x7fa021b8e93f. RSP: 002b:00007fa0229490e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fa021db6088 RCX: 00007fa021b8e969 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa021db6088 RBP: 00007fa021db6080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa021db608c R13: 0000000000000000 R14: 00007fffef318850 R15: 00007fffef318938