smpboot: CPU 1 is now offline smpboot: Booting Node 0 Processor 1 APIC 0x1 ------------[ cut here ]------------ debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0) WARNING: kernel/sched/sched.h:1666 at lockdep_assert_rq_held kernel/sched/sched.h:1666 [inline], CPU#0: syz.0.208/6299 WARNING: kernel/sched/sched.h:1666 at update_rq_clock+0x34d/0x560 kernel/sched/core.c:876, CPU#0: syz.0.208/6299 Modules linked in: CPU: 0 UID: 0 PID: 6299 Comm: syz.0.208 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1666 [inline] RIP: 0010:update_rq_clock+0x34d/0x560 kernel/sched/core.c:876 Code: 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 3b 8f a2 00 4c 01 3b 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 <0f> 0b 90 e9 42 fd ff ff 48 89 df 48 83 c4 10 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90004b576b8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b853bbc0 RCX: 0000000000000002 RDX: 00000000000000ff RSI: ffffffff8e80f0e9 RDI: ffffffff8c6edc80 RBP: dffffc0000000000 R08: ffffffff909ba57f R09: 1ffffffff21374af R10: dffffc0000000000 R11: ffffffff81a06440 R12: ffff88801deb8000 R13: dffffc0000000001 R14: ffff8880b853ca88 R15: ffff8880b853bbc0 FS: 000055557c81f500(0000) GS:ffff88812488b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000002 CR3: 0000000035756000 CR4: 00000000003526f0 Call Trace: pick_next_task kernel/sched/core.c:6362 [inline] __schedule+0x3d5e/0x5bc0 kernel/sched/core.c:7187 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7451 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline] _raw_spin_unlock_irqrestore+0x76/0x80 kernel/locking/spinlock.c:221 cpuhp_bp_sync_alive kernel/cpu.c:449 [inline] cpuhp_bringup_ap+0x90/0x360 kernel/cpu.c:843 cpuhp_invoke_callback+0x434/0x810 kernel/cpu.c:194 __cpuhp_invoke_callback_range kernel/cpu.c:972 [inline] cpuhp_invoke_callback_range kernel/cpu.c:996 [inline] cpuhp_up_callbacks kernel/cpu.c:1027 [inline] _cpu_up+0x2ce/0x5b0 kernel/cpu.c:1674 cpu_up+0x1d2/0x220 kernel/cpu.c:1706 cpu_subsys_online+0x67/0x280 drivers/base/cpu.c:61 device_online+0x181/0x1e0 drivers/base/core.c:4312 online_store+0xd7/0x1a0 drivers/base/core.c:2883 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0c1cf9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff7e3fab28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0c1d225fa0 RCX: 00007f0c1cf9e0d9 RDX: 0000000000000002 RSI: 0000200000000180 RDI: 0000000000000003 RBP: 00007f0c1d035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0c1d225fac R14: 00007f0c1d225fa0 R15: 00007f0c1d225fa0