watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.1.20:5997] Modules linked in: irq event stamp: 20158483 hardirqs last enabled at (20158482): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (20158483): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (20132590): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (20132590): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (20132590): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 softirqs last disabled at (20132593): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (20132593): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (20132593): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 5997 Comm: syz.1.20 Not tainted 6.14.0-syzkaller-ge48e99b6edf4 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 aa 1c 6c f5 48 89 df e8 e2 c5 6c f5 e8 cd 66 98 f5 fb bf 01 00 00 00 52 a8 5d f5 65 8b 05 3b ad 35 07 85 c0 74 06 5b c3 cc cc cc cc RSP: 0000:ffffc90000a08c70 EFLAGS: 00000286 RAX: ee28d977a0dce000 RBX: ffff8880b8725540 RCX: 0000000000000002 RDX: 0000000000000002 RSI: ffffffff8e69b310 RDI: 0000000000000001 RBP: ffffc90000a08dd0 R08: ffffffff905fcf77 R09: 1ffffffff20bf9ee R10: dffffc0000000000 R11: fffffbfff20bf9ef R12: ffffffff8a0d1d90 R13: ffffc90000a08d20 R14: ffff88807f133c80 R15: ffff88807f133c60 FS: 0000000000000000(0000) GS:ffff888125097000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f752d8b8030 CR3: 000000004bf88000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: expire_timers kernel/time/timer.c:1839 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x65e/0x8e0 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 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:raw_spin_rq_unlock_irq+0x19/0x90 kernel/sched/sched.h:1526 Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 53 48 89 fb 66 90 48 89 df e8 0e f6 9f 0a e8 a9 5e 38 00 fb 5b <41> 5e 41 5f c3 cc cc cc cc f3 0f 1e fa 49 bf 00 00 00 00 00 fc ff RSP: 0000:ffffc900045d6ee8 EFLAGS: 00000286 RAX: ee28d977a0dce000 RBX: ffff8880b8739b00 RCX: 0000000000000006 RDX: 0000000000000006 RSI: ffffffff8e69b310 RDI: ffffffff8ca1b0e0 RBP: ffffc900045d7130 R08: ffffffff905fcf77 R09: 1ffffffff20bf9ee R10: dffffc0000000000 R11: fffffbfff20bf9ef R12: ffff8880b8639b00 R13: ffff8880b873a698 R14: ffff8880b873a600 R15: ffff88802bf60780 __schedule+0x1dc1/0x5240 kernel/sched/core.c:6771 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947 preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x134/0x140 kernel/locking/spinlock.c:194 stack_depot_save_flags+0x43f/0x940 lib/stackdepot.c:671 kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48 kasan_record_aux_stack+0xbf/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3082 [inline] call_rcu+0x172/0xad0 kernel/rcu/tree.c:3202 destroy_inode fs/inode.c:401 [inline] evict+0x837/0x9b0 fs/inode.c:834 __dentry_kill+0x20d/0x630 fs/dcache.c:660 dput+0x19f/0x2b0 fs/dcache.c:902 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1612 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620 kill_anon_super fs/super.c:1237 [inline] kill_litter_super+0x76/0xb0 fs/super.c:1247 gadgetfs_kill_sb+0x26/0x110 drivers/usb/gadget/legacy/inode.c:2110 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435 task_work_run+0x251/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa11/0x27f0 kernel/exit.c:953 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 get_signal+0x1696/0x1730 kernel/signal.c:3034 arch_do_signal_or_restart+0x98/0x840 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+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f03c9b8d169 Code: Unable to access opcode bytes at 0x7f03c9b8d13f. RSP: 002b:00007f03ca9d6fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: fffffffffffffff4 RBX: 00007f03c9da6080 RCX: 00007f03c9b8d169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000640c7000 RBP: 00007f03c9c0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f03c9da6080 R15: 00007fff29f09588 Sending NMI from CPU 1 to CPUs 0: rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5999 Comm: syz.0.21 Not tainted 6.14.0-syzkaller-ge48e99b6edf4 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x86/0x2a0 mm/kasan/generic.c:189 Code: 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 <0f> 85 d6 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 00 45 89 dc RSP: 0018:ffffc900000056d0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 1ffffd1ffff94c04 RCX: ffffffff81cd3591 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffe8ffffca6024 RBP: fffffffffffffffe R08: ffffe8ffffca602b R09: 1ffffd1ffff94c05 R10: dffffc0000000000 R11: fffff91ffff94c04 R12: 000000000000002c R13: dffffc0000000000 R14: dffffc0000000001 R15: fffff91ffff94c06 FS: 0000000000000000(0000) GS:ffff888124f97000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc770b16050 CR3: 000000006caf8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 perf_trace_buf_alloc+0x1d1/0x2a0 kernel/trace/trace_event_perf.c:419 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x1fe/0x520 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+0x2c6/0x2f0 kernel/locking/lockdep.c:5829 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 console_lock_spinning_enable kernel/printk/printk.c:1918 [inline] console_emit_next_record kernel/printk/printk.c:3132 [inline] console_flush_all+0x7bd/0xec0 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0x151/0x3b0 kernel/printk/printk.c:3325 vprintk_emit+0x761/0xa40 kernel/printk/printk.c:2450 _printk+0xd5/0x120 kernel/printk/printk.c:2475 print_other_cpu_stall+0x1ae/0x15e0 kernel/rcu/tree_stall.h:598 check_cpu_stall kernel/rcu/tree_stall.h:795 [inline] rcu_pending kernel/rcu/tree.c:3630 [inline] rcu_sched_clock_irq+0xa2a/0x10f0 kernel/rcu/tree.c:2669 update_process_times+0x242/0x2f0 kernel/time/timer.c:2515 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x37c/0x500 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1791 [inline] __hrtimer_run_queues+0x55c/0xd40 kernel/time/hrtimer.c:1855 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 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:perf_tp_event+0x191/0x1660 kernel/events/core.c:10876 Code: 85 aa 14 00 00 c7 84 24 1c 02 00 00 00 00 00 00 0f b7 74 24 10 48 8b 7c 24 18 e8 4a 2b d7 ff 4c 89 f0 48 c1 e8 03 80 3c 18 00 <49> 89 dc 4c 8d bc 24 c0 00 00 00 74 08 4c 89 f7 e8 aa 75 37 00 4d RSP: 0018:ffffc90000006440 EFLAGS: 00000246 RAX: 1ffffd1ffff84539 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff888029040000 RSI: 0000000000000000 RDI: ffffe8ffffc89004 RBP: ffffc90000006720 R08: ffffffff81c7dc4d R09: 0000000000000000 R10: ffffc90000006640 R11: fffff52000000cca R12: ffffc90000006640 R13: ffffc90000006650 R14: ffffe8ffffc229c8 R15: 000000000000002c perf_trace_run_bpf_submit+0x100/0x180 kernel/events/core.c:10812 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x402/0x520 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+0x2c6/0x2f0 kernel/locking/lockdep.c:5829 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:1155 [inline] unwind_next_frame+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479 __unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe7/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbf/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0xac/0x3f0 mm/slab_common.c:1962 cfg80211_update_known_bss+0x7f2/0x1350 net/wireless/scan.c:1925 __cfg80211_bss_update+0x156/0x20a0 net/wireless/scan.c:1972 cfg80211_inform_single_bss_data+0xdfd/0x1ed0 net/wireless/scan.c:2363 cfg80211_inform_bss_data+0x3c5/0x5860 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x3c5/0x720 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x8ac/0xbc0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5179 [inline] ieee80211_rx_list+0x28cd/0x3490 net/mac80211/rx.c:5416 ieee80211_rx_napi+0x187/0x3c0 net/mac80211/rx.c:5439 ieee80211_rx include/net/mac80211.h:5179 [inline] ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:441 tasklet_action_common+0x428/0x620 kernel/softirq.c:829 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 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:free_frozen_page_commit+0x214/0x1150 include/linux/list.h:-1 Code: df 42 80 3c 20 00 74 08 48 89 df e8 76 68 0e 00 4c 89 33 43 80 3c 27 00 74 08 4c 89 f7 e8 64 68 0e 00 48 8b 44 24 28 49 89 06 <48> 8b 7c 24 40 83 ff 20 48 8b 54 24 18 0f 83 2e 0d 00 00 4c 8d 5a RSP: 0018:ffffc90004637720 EFLAGS: 00000246 RAX: ffffea0001a8c508 RBX: ffffea0001a8c510 RCX: dffffc0000000000 RDX: ffffea0001b34d88 RSI: ffff8880b863f6e0 RDI: ffffea0001a8c508 RBP: ffffc90004637830 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffea0001b34d88 R14: ffff8880b863f6e0 R15: 1ffff110170c7edc __free_frozen_pages+0x808/0x10a0 mm/page_alloc.c:2708 vfree+0x1c3/0x360 mm/vmalloc.c:3383 kcov_put kernel/kcov.c:439 [inline] kcov_close+0x28/0x50 kernel/kcov.c:535 __fput+0x3e9/0x9f0 fs/file_table.c:465 task_work_run+0x251/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa11/0x27f0 kernel/exit.c:953 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 get_signal+0x1696/0x1730 kernel/signal.c:3034 arch_do_signal_or_restart+0x98/0x840 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+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f10f798d169 Code: Unable to access opcode bytes at 0x7f10f798d13f. RSP: 002b:00007f10f87ee038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: 000000000000000c RBX: 00007f10f7ba5fa0 RCX: 00007f10f798d169 RDX: 0000000000000094 RSI: 0000200000000880 RDI: 0000000000000005 RBP: 00007f10f7a0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f10f7ba5fa0 R15: 00007ffca3cc9098