------------[ cut here ]------------
ODEBUG: init active (active state 0) object: ffff8880b85234a0 object type: timer_list hint: mce_timer_fn+0x0/0x280 include/linux/highmem-internal.h:-1
WARNING: lib/debugobjects.c:632 at debug_print_object+0xec/0x230 lib/debugobjects.c:629, CPU#1: swapper/1/0
Modules linked in:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G S                  syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [S]=CPU_OUT_OF_SPEC
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:debug_print_object+0x18a/0x230 lib/debugobjects.c:629
Code: f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 7d b5 58 fd 4d 8b 0f 4c 89 ef 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f0 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 ff 05 a3 61 d7 0b 48 83 c4 10 5b 41 5c
RSP: 0000:ffffc900001d7c20 EFLAGS: 00010046
RAX: 1ffffffff16df3c0 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffffff8bcc7540 RSI: ffffffff8bcc7140 RDI: ffffffff90bccee0
RBP: ffffffff8bcc7540 R08: ffff8880b85234a0 R09: ffffffff8b6fb180
R10: dffffc0000000000 R11: ffffffff81b2b680 R12: 0000000000000000
R13: ffffffff90bccee0 R14: ffff8880b85234a0 R15: ffffffff8b6f9e00
FS:  0000000000000000(0000) GS:ffff888124abb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000efb0000 CR4: 00000000003506b0
Call Trace:
 <TASK>
 __debug_object_init+0x224/0x350 lib/debugobjects.c:818
 debug_timer_init kernel/time/timer.c:788 [inline]
 debug_init kernel/time/timer.c:836 [inline]
 timer_init_key+0x41/0x2c0 kernel/time/timer.c:880
 __mcheck_cpu_setup_timer arch/x86/kernel/cpu/mce/core.c:2087 [inline]
 mcheck_cpu_init+0x3dc/0x600 arch/x86/kernel/cpu/mce/core.c:2262
 identify_cpu+0x1f2c/0x3940 arch/x86/kernel/cpu/common.c:2126
 identify_secondary_cpu+0xaa/0x160 arch/x86/kernel/cpu/common.c:2187
 ap_starting+0x9c/0x150 arch/x86/kernel/smpboot.c:190
 start_secondary+0x66/0x110 arch/x86/kernel/smpboot.c:280
 common_startup_64+0x13e/0x157
 </TASK>
irq event stamp: 128296
hardirqs last  enabled at (128295): [<ffffffff8195e84e>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1697 [inline]
hardirqs last  enabled at (128295): [<ffffffff8195e84e>] finish_lock_switch kernel/sched/core.c:5264 [inline]
hardirqs last  enabled at (128295): [<ffffffff8195e84e>] finish_task_switch+0x40e/0xc60 kernel/sched/core.c:5382
hardirqs last disabled at (128296): [<ffffffff819ac079>] do_idle+0x4f9/0x540 kernel/sched/idle.c:284
softirqs last  enabled at (0): [<ffffffff81869136>] rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
softirqs last  enabled at (0): [<ffffffff81869136>] rcu_read_lock include/linux/rcupdate.h:849 [inline]
softirqs last  enabled at (0): [<ffffffff81869136>] copy_process+0xd16/0x4410 kernel/fork.c:2180
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
IS_ENABLED(CONFIG_PREEMPT_COUNT) && __lockdep_enabled && (preempt_count() != 0 || !this_cpu_read(hardirqs_enabled))
WARNING: kernel/time/timer.c:1618 at __timer_delete_sync+0x226/0x620 kernel/time/timer.c:1618, CPU#1: swapper/1/0
Modules linked in:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G S      W           syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [S]=CPU_OUT_OF_SPEC, [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__timer_delete_sync+0x226/0x620 kernel/time/timer.c:1618
Code: fb 65 4c 8b 3d 4b de f3 11 41 bc ff ff ff ff 4c 89 fe 4c 21 e6 31 ff e8 58 6d 14 00 4d 21 e7 74 0e e8 7e 67 14 00 49 89 df 90 <0f> 0b 90 eb 20 65 8b 2d 86 1e f4 11 31 ff 89 ee e8 75 6c 14 00 85
RSP: 0000:ffffc900001d7c08 EFLAGS: 00010093
RAX: ffffffff81b271e2 RBX: dffffc0000000000 RCX: ffff88801dea0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff81b2b7d0 R12: 00000000ffffffff
R13: ffff8880b85234a0 R14: ffff8880b85234c0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124abb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000efb0000 CR4: 00000000003506b0
Call Trace:
 <TASK>
 timer_delete_sync kernel/time/timer.c:1676 [inline]
 timer_fixup_init+0x31/0x60 kernel/time/timer.c:705
 debug_object_fixup lib/debugobjects.c:645 [inline]
 __debug_object_init+0x260/0x350 lib/debugobjects.c:821
 debug_timer_init kernel/time/timer.c:788 [inline]
 debug_init kernel/time/timer.c:836 [inline]
 timer_init_key+0x41/0x2c0 kernel/time/timer.c:880
 __mcheck_cpu_setup_timer arch/x86/kernel/cpu/mce/core.c:2087 [inline]
 mcheck_cpu_init+0x3dc/0x600 arch/x86/kernel/cpu/mce/core.c:2262
 identify_cpu+0x1f2c/0x3940 arch/x86/kernel/cpu/common.c:2126
 identify_secondary_cpu+0xaa/0x160 arch/x86/kernel/cpu/common.c:2187
 ap_starting+0x9c/0x150 arch/x86/kernel/smpboot.c:190
 start_secondary+0x66/0x110 arch/x86/kernel/smpboot.c:280
 common_startup_64+0x13e/0x157
 </TASK>
irq event stamp: 128296
hardirqs last  enabled at (128295): [<ffffffff8195e84e>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1697 [inline]
hardirqs last  enabled at (128295): [<ffffffff8195e84e>] finish_lock_switch kernel/sched/core.c:5264 [inline]
hardirqs last  enabled at (128295): [<ffffffff8195e84e>] finish_task_switch+0x40e/0xc60 kernel/sched/core.c:5382
hardirqs last disabled at (128296): [<ffffffff819ac079>] do_idle+0x4f9/0x540 kernel/sched/idle.c:284
softirqs last  enabled at (0): [<ffffffff81869136>] rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
softirqs last  enabled at (0): [<ffffffff81869136>] rcu_read_lock include/linux/rcupdate.h:849 [inline]
softirqs last  enabled at (0): [<ffffffff81869136>] copy_process+0xd16/0x4410 kernel/fork.c:2180
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f8                   	clc
   1:	48 c1 e8 03          	shr    $0x3,%rax
   5:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
   9:	74 08                	je     0x13
   b:	4c 89 ff             	mov    %r15,%rdi
   e:	e8 7d b5 58 fd       	call   0xfd58b590
  13:	4d 8b 0f             	mov    (%r15),%r9
  16:	4c 89 ef             	mov    %r13,%rdi
  19:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  1e:	48 89 ea             	mov    %rbp,%rdx
  21:	44 89 e1             	mov    %r12d,%ecx
  24:	4d 89 f0             	mov    %r14,%r8
  27:	ff 34 24             	push   (%rsp)
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	ff 05 a3 61 d7 0b    	incl   0xbd761a3(%rip)        # 0xbd761dc
  39:	48 83 c4 10          	add    $0x10,%rsp
  3d:	5b                   	pop    %rbx
  3e:	41 5c                	pop    %r12