watchdog: BUG: soft lockup - CPU#1 stuck for 142s! [syz.6.210:6895] Modules linked in: irq event stamp: 10883929 hardirqs last enabled at (10883928): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10883929): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (10599110): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10599110): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10599110): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10599113): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10599113): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10599113): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6895 Comm: syz.6.210 Not tainted 6.15.0-rc4-syzkaller-g7220eabff8cb #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__cant_sleep+0xc/0x210 kernel/sched/core.c:8824 Code: 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 80 00 00 00 65 48 8b 05 7c d6 RSP: 0018:ffffc90000a081c0 EFLAGS: 00000246 RAX: ffffffff81cad416 RBX: 0000000000000001 RCX: ffff88802c63da00 RDX: 0000000000000000 RSI: 0000000000000072 RDI: ffffffff8b7032e0 RBP: ffffc90000a081d0 R08: 0000000000000001 R09: ffff8880b8932608 R10: dffffc0000000000 R11: fffff91ffffb9405 R12: ffffe8ffffdca000 R13: 1ffff92000141048 R14: ffff8880b8932608 R15: ffffffff8de0ab40 FS: 00007f5a409bd6c0(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5a4097bd58 CR3: 0000000033ba0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_call_bpf+0x89/0x850 kernel/trace/bpf_trace.c:114 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10788 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 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:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4262 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:658 alloc_skb include/linux/skbuff.h:1340 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:423 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4038 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 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+0xb7/0x180 kernel/time/timer.c:2445 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090 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 eb c3 39 f6 e8 86 43 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90003907960 EFLAGS: 00000286 RAX: 56fa853e68393e00 RBX: 0000000000000000 RCX: 56fa853e68393e00 RDX: 0000000000000006 RSI: ffffffff8d74a4de RDI: 0000000000000001 RBP: ffffc90003907a10 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000720f2c 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:perf_trace_init+0xa2/0x2d0 kernel/trace/trace_event_perf.c:223 Code: e0 e8 f9 8d 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 30 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 17 01 00 00 4d 63 24 24 <4c> 89 ff 4c 89 e6 e8 43 bc f6 ff 4d 39 e7 0f 85 a9 00 00 00 4c 8d RSP: 0018:ffffc90003907ad8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8e95a2c0 RCX: 0000000000080000 RDX: ffffc9000d30c000 RSI: 0000000000000e50 RDI: 0000000000000e51 RBP: 0000000000000002 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 0000000000000af9 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000210 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10729 perf_try_init_event+0x176/0x860 kernel/events/core.c:12300 perf_init_event kernel/events/core.c:12398 [inline] perf_event_alloc+0x12bb/0x29b0 kernel/events/core.c:12672 __do_sys_perf_event_open kernel/events/core.c:13171 [inline] __se_sys_perf_event_open+0x6db/0x1c80 kernel/events/core.c:13061 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: 0033:0x7f5a3fb8e969 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:00007f5a409bd038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f5a3fdb5fa0 RCX: 00007f5a3fb8e969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000340 RBP: 00007f5a3fc10ab1 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5a3fdb5fa0 R15: 00007ffd39af1438 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6896 Comm: syz.7.209 Not tainted 6.15.0-rc4-syzkaller-g7220eabff8cb #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:trace_hrtimer_expire_entry include/trace/events/timer.h:259 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1758 [inline] RIP: 0010:__hrtimer_run_queues+0x46b/0xc60 kernel/time/hrtimer.c:1825 Code: 70 d2 7e 8f be 08 00 00 00 e8 a1 91 73 00 31 f6 4c 0f a3 3d 27 ad d0 0d 41 0f 92 c7 40 0f 92 c6 bf 02 00 00 00 e8 75 9c 11 00 <45> 84 ff 74 10 e8 9b c0 f8 ff 84 c0 74 0e e8 62 99 11 00 eb 19 e8 RSP: 0018:ffffc900000060e0 EFLAGS: 00000006 RAX: ffffffff81ae255b RBX: ffff8880b8827788 RCX: 0000000000010100 RDX: ffff888041961e00 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc90000006228 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: ffff88807571f5c8 R13: 0000000000000000 R14: ffffffff81f2d730 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f42736c3020 CR3: 00000000330ee000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2f/0x90 kernel/kcov.c:314 Code: 8b 04 24 65 48 8b 14 25 08 40 75 92 65 8b 0d 08 7d b5 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 <74> 52 8b 8a 18 16 00 00 83 f9 03 75 47 48 8b 8a 20 16 00 00 44 8b RSP: 0018:ffffc90000006458 EFLAGS: 00000246 RAX: ffffffff81717d91 RBX: 0000000000001009 RCX: 0000000000000100 RDX: ffff888041961e00 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81eebf8f R12: ffff8880b8832608 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000d28 perf_get_regs_user+0x31/0x6b0 arch/x86/kernel/perf_regs.c:136 perf_sample_regs_user kernel/events/core.c:7321 [inline] perf_prepare_sample+0x9da/0x21e0 kernel/events/core.c:8136 __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 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 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 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4341 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4353 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] cfg80211_inform_single_bss_data+0x905/0x1ac0 net/wireless/scan.c:2339 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:zap_pte_range mm/memory.c:-1 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1823 [inline] RIP: 0010:zap_pud_range mm/memory.c:1852 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1873 [inline] RIP: 0010:unmap_page_range+0xa19/0x4210 mm/memory.c:1894 Code: ee 48 8b bc 24 f0 00 00 00 e8 13 bb 06 00 c7 84 24 cc 00 00 00 00 00 00 00 65 48 8b 04 25 08 40 75 92 48 89 84 24 50 01 00 00 <48> 89 5c 24 68 4c 89 64 24 20 48 89 c1 48 c1 e9 03 48 89 8c 24 b8 RSP: 0018:ffffc90003097420 EFLAGS: 00000293 RAX: ffff888041961e00 RBX: 00007f4f88691000 RCX: ffff888041961e00 RDX: 0000000000000000 RSI: 00000000000001fd RDI: 0000000000000094 RBP: ffffc900030976b0 R08: ffffea0001c025b3 R09: 1ffffd40003804b6 R10: dffffc0000000000 R11: fffff940003804b7 R12: ffff88807401d488 R13: dffffc0000000000 R14: dffffc0000000000 R15: 00007f4f88690000 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: 0033:0x7f4f8978e969 Code: Unable to access opcode bytes at 0x7f4f8978e93f. RSP: 002b:00007f4f8a5eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff5 RBX: 00007f4f899b5fa0 RCX: 00007f4f8978e969 RDX: 0000000000000094 RSI: 0000200000000240 RDI: 0000000000000005 RBP: 00007f4f89810ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4f899b5fa0 R15: 00007fff5eb76348