RBP: 00007f0a1d013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0a1d1e6038 R14: 00007f0a1d1e5fa0 R15: 00007ffdbbfb1548 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.9.5548:25189] Modules linked in: irq event stamp: 1642312 hardirqs last enabled at (1642311): [] irqentry_exit+0x1dd/0x8c0 kernel/entry/common.c:219 hardirqs last disabled at (1642312): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (1642310): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1642310): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1642310): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 softirqs last disabled at (1642281): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1642281): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1642281): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 25189 Comm: syz.9.5548 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xdfd/0x15e0 kernel/smp.c:877 Code: 57 48 8b 54 24 10 4c 89 74 24 10 49 89 d5 48 89 d5 48 89 54 24 18 49 c1 ed 03 83 e5 07 4d 01 e5 83 c5 03 e8 65 5b 0c 00 f3 90 <41> 0f b6 45 00 40 38 c5 7c 08 84 c0 0f 85 b6 05 00 00 8b 43 08 31 RSP: 0018:ffffc9000b3b7b40 EFLAGS: 00000246 RAX: 0000000000080000 RBX: ffff8880b8443020 RCX: ffffc900186b7000 RDX: 0000000000080000 RSI: ffffffff81b288ab RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8880285d29b0 R12: dffffc0000000000 R13: ffffed1017088605 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f0a1ddef6c0(0000) GS:ffff888124a08000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0a1ddeef98 CR3: 0000000030b6e000 CR4: 0000000000350ef0 Call Trace: clock_was_set+0x642/0x870 kernel/time/hrtimer.c:969 do_settimeofday64+0x364/0x550 kernel/time/timekeeping.c:1460 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195 __do_sys_clock_settime kernel/time/posix-timers.c:1131 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1115 [inline] __x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1115 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0a1cf8f749 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:00007f0a1ddef038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007f0a1d1e5fa0 RCX: 00007f0a1cf8f749 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0100000000000000 RBP: 00007f0a1d013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0a1d1e6038 R14: 00007f0a1d1e5fa0 R15: 00007ffdbbfb1548 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:should_restart_cycle net/sched/sch_taprio.c:878 [inline] RIP: 0010:advance_sched+0x296/0xc80 net/sched/sch_taprio.c:954 Code: 09 00 00 48 8b 04 24 48 8d bd 28 01 00 00 48 89 fa 4c 8b b8 40 01 00 00 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 <0f> 85 f8 08 00 00 4c 8b ad 28 01 00 00 4d 39 fe 0f 84 b5 01 00 00 RSP: 0018:ffffc90000007d90 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff88806dcef300 RCX: ffffffff897e6074 RDX: 1ffff1100a537ca5 RSI: ffffffff897e6082 RDI: ffff8880529be528 RBP: ffff8880529be400 R08: 0000000000000006 R09: 187f4664194db2c7 R10: 0000000000000000 R11: ffffffff8e098670 R12: 187f4664194db2c7 R13: 0000000000000000 R14: ffff8880529be510 R15: ffff888053bbe540 FS: 0000000000000000(0000) GS:ffff888124908000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0a1d1e7dac CR3: 0000000030b6e000 CR4: 0000000000350ef0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x202/0xc40 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3c0 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82 Code: 26 61 02 e9 5e a3 9a f5 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 a9 14 00 fb f4 37 a3 9a f5 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffffff8e007df8 EFLAGS: 000002c6 RAX: 0000000002aff6bf RBX: 0000000000000000 RCX: ffffffff8b75b6d9 RDX: 0000000000000000 RSI: ffffffff8dac06f7 RDI: ffffffff8bf24500 RBP: fffffbfff1c12f68 R08: 0000000000000001 R09: ffffed101708673d R10: ffff8880b84339eb R11: ffffffff8e098670 R12: 0000000000000000 R13: ffffffff8e097b40 R14: ffffffff90882dd0 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x38d/0x510 kernel/sched/idle.c:332 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430 rest_init+0x16b/0x2b0 init/main.c:757 start_kernel+0x3ef/0x4d0 init/main.c:1206 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x148