------------[ cut here ]------------
cpu_t != t
WARNING: arch/x86/kernel/cpu/mce/core.c:1770 at mce_timer_fn+0x23f/0x280 arch/x86/kernel/cpu/mce/core.c:1770, CPU#0: ktimers/0/16
Modules linked in:
CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:mce_timer_fn+0x23f/0x280 arch/x86/kernel/cpu/mce/core.c:1770
Code: 00 75 0a e8 63 35 55 00 e9 16 ff ff ff e8 59 35 55 00 4c 8b 1d c2 86 8f 0c 2e e8 24 a0 8f 1e e9 ff fe ff ff e8 42 35 55 00 90 <0f> 0b 90 e9 33 fe ff ff e8 34 35 55 00 48 c7 c7 40 20 00 8e 4c 89
RSP: 0018:ffffc90000157a08 EFLAGS: 00010246
RAX: ffffffff8170934e RBX: ffff8880b87234a0 RCX: ffff88801caa8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000100
R10: dffffc0000000000 R11: ffffffff81709110 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8db3c7d0 R15: ffff8880b87234a0
FS:  0000000000000000(0000) GS:ffff888125c3a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6bc0e5ec8 CR3: 0000000041da4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x67b/0x9b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0x67/0x170 kernel/time/timer.c:2403
 handle_softirqs+0x1d9/0x6c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 run_ktimerd+0x69/0x100 kernel/softirq.c:1151
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>