watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz-executor.3:10162] Modules linked in: irq event stamp: 192821 hardirqs last enabled at (192820): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (192820): [] _raw_spin_unlock_irqrestore+0x4e/0x70 kernel/locking/spinlock.c:194 hardirqs last disabled at (192821): [] sysvec_apic_timer_interrupt+0xe/0xb0 arch/x86/kernel/apic/apic.c:1076 softirqs last enabled at (8336): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (8336): [] __do_softirq+0x597/0x8de kernel/softirq.c:582 softirqs last disabled at (8345): [] invoke_softirq kernel/softirq.c:427 [inline] softirqs last disabled at (8345): [] __irq_exit_rcu kernel/softirq.c:632 [inline] softirqs last disabled at (8345): [] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 CPU: 1 PID: 10162 Comm: syz-executor.3 Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 a6 5e e4 f6 48 89 df e8 8e d6 e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 45 8f d6 f6 65 8b 05 76 26 80 75 85 c0 74 12 5b RSP: 0018:ffffc900001f0a90 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff888021170000 RCX: 1ffffffff23f1c8e RDX: 0000000000000000 RSI: ffffffff8accaec0 RDI: ffffffff8b2f0220 RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff23e39f2 R10: ffffffff91f1cf97 R11: 0000000000000003 R12: ffff88802ba3c000 R13: ffff88802ba3bf00 R14: dffffc0000000000 R15: 1ffff9200003e182 FS: 0000000000000000(0000) GS:ffff8880b9900000(0063) knlGS:00000000f7f08b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000003172c000 CR3: 00000000255e5000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] dummy_timer+0x1f57/0x3600 drivers/usb/gadget/udc/dummy_hcd.c:2001 call_timer_fn+0x193/0x590 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb20 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x21a/0x8de kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5722 Code: c1 05 3d 84 9a 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc900038b7cc8 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92000716f9b RCX: ffffffff8167148e RDX: 0000000000000001 RSI: ffffffff8accb1c0 RDI: ffffffff8b2f0220 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23e39d6 R10: ffffffff91f1ceb7 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888072434da0 R15: 0000000000000000 __might_fault mm/memory.c:5956 [inline] __might_fault+0x11f/0x1a0 mm/memory.c:5949 rseq_get_rseq_cs kernel/rseq.c:161 [inline] rseq_ip_fixup kernel/rseq.c:281 [inline] __rseq_handle_notify_resume+0x14c/0x1020 kernel/rseq.c:329 rseq_handle_notify_resume include/linux/sched.h:2361 [inline] resume_user_mode_work include/linux/resume_user_mode.h:61 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x170/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296 __do_fast_syscall_32+0x6f/0xe0 arch/x86/entry/common.c:324 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x70/0x7a RIP: 0023:0xf7f0d579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f0866c EFLAGS: 00000246 ORIG_RAX: 00000000000000f0 RAX: 0000000000000001 RBX: 00000000f737afcc RCX: 0000000000000081 RDX: 00000000000f4240 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000f7219ea9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.7.0-rc8-syzkaller-00024-gac865f00af29 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:task_irq_context kernel/locking/lockdep.c:4608 [inline] RIP: 0010:__lock_acquire+0x341/0x3b20 kernel/locking/lockdep.c:5074 Code: cd ce 9a 7e 85 c0 48 8b 04 24 41 0f 95 c5 45 01 ed 48 8d b0 a4 0a 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f2 48 89 74 24 48 <48> c1 ea 03 0f b6 14 02 48 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 RSP: 0018:ffffc90000007d40 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffffffff8cc963a4 RSI: ffffffff8cc963a4 RDI: ffffffff8cc963c8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8cc963c0 R13: 0000000000000002 R14: 0000000000000000 R15: 00000000000000cf FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c000a07e80 CR3: 000000007a9ac000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 do_write_seqcount_begin_nested include/linux/seqlock.h:525 [inline] do_write_seqcount_begin include/linux/seqlock.h:551 [inline] tick_nohz_stop_idle+0x154/0x320 kernel/time/tick-sched.c:671 tick_nohz_irq_enter kernel/time/tick-sched.c:1465 [inline] tick_irq_enter+0x171/0x250 kernel/time/tick-sched.c:1491 irq_enter_rcu+0xcd/0xe0 kernel/softirq.c:595 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline] RIP: 0010:acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:113 Code: ed c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 65 48 8b 04 25 c0 bc 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 37 f9 b9 00 fb f4 c3 0f 1f 00 0f b6 47 08 3c 01 74 0b 3c 02 74 05 8b 7f 04 eb 9f RSP: 0018:ffffffff8cc07d68 EFLAGS: 00000246 RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8a8018d7 RDX: 0000000000000001 RSI: ffff888145e5e000 RDI: ffff888145e5e064 RBP: ffff888145e5e064 R08: 0000000000000001 R09: ffffed1017306dbd R10: ffff8880b9836deb R11: 0000000000000000 R12: ffff888018247800 R13: ffffffff8db1c2e0 R14: 0000000000000000 R15: 0000000000000000 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x83/0x500 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388 cpuidle_idle_call kernel/sched/idle.c:215 [inline] do_idle+0x319/0x400 kernel/sched/idle.c:282 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380 rest_init+0x16f/0x2b0 init/main.c:730 arch_call_rest_init+0x13/0x30 init/main.c:827 start_kernel+0x39f/0x480 init/main.c:1072 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0x178/0x17b