------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88805ebe8490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2928
WARNING: lib/debugobjects.c:629 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:629, CPU#0: swapper/0/0
Modules linked in:
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 02/27/2026
RIP: 0010:debug_print_object+0x19b/0x2a0 lib/debugobjects.c:629
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 48 8d 3d 62 cb e5 0b 41 56 48 8b 14 dd 60 0d 1b 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 2c 8c db 0b 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90000007a38 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffffffff8c1b0ca0 RSI: ffffffff8c1b08c0 RDI: ffffffff90e3f630
RBP: 0000000000000001 R08: ffff88805ebe8490 R09: ffffffff8bb2b900
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c1b08c0
R13: ffffffff8bb2b940 R14: ffffffff8a7b5db0 R15: ffffc90000007b38
FS:  0000000000000000(0000) GS:ffff888124345000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63401e9e80 CR3: 00000000628de000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
 debug_check_no_obj_freed+0x4da/0x630 lib/debugobjects.c:1146
 slab_free_hook mm/slub.c:2623 [inline]
 slab_free mm/slub.c:6168 [inline]
 kfree+0x38f/0x6b0 mm/slub.c:6486
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
 call_timer_fn+0x19a/0x670 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers+0x757/0xb30 kernel/time/timer.c:2373
 __run_timer_base kernel/time/timer.c:2385 [inline]
 __run_timer_base kernel/time/timer.c:2377 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2394
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2404
 handle_softirqs+0x1eb/0x9e0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xef/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:sched_core_balance+0x9f/0xe20 kernel/sched/core.c:6326
Code: 76 7e 8e e8 03 09 0e 00 e8 6e b4 b8 09 41 5a 85 c0 0f 85 28 0a 00 00 4c 89 ef e8 fc 35 ff ff e8 37 df 39 00 fb 48 63 44 24 50 <48> c7 c3 40 61 0f 94 48 89 dd 48 89 44 24 08 48 83 f8 08 0f 83 4c
RSP: 0018:ffffffff8e407b80 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff8880b84244b0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8de74d20 RDI: ffffffff8c1afba0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b843b140
R13: ffff8880b843b140 R14: 0000000000000000 R15: ffffffff81d6da80
 do_balance_callbacks kernel/sched/core.c:4926 [inline]
 __balance_callbacks+0x21d/0x6e0 kernel/sched/core.c:4982
 __schedule+0x2fcb/0x6120 kernel/sched/core.c:6915
 schedule_idle+0x54/0x80 kernel/sched/core.c:7031
 do_idle+0x289/0x4b0 kernel/sched/idle.c:360
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
 rest_init+0x251/0x260 init/main.c:760
 start_kernel+0x47f/0x480 init/main.c:1210
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x148
 </TASK>
----------------
Code disassembly (best guess):
   0:	b8 00 00 00 00       	mov    $0x0,%eax
   5:	00 fc                	add    %bh,%ah
   7:	ff                   	lcall  (bad)
   8:	df 48 89             	fisttps -0x77(%rax)
   b:	fa                   	cli
   c:	48 c1 ea 03          	shr    $0x3,%rdx
  10:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  14:	75 4f                	jne    0x65
  16:	48 8d 3d 62 cb e5 0b 	lea    0xbe5cb62(%rip),%rdi        # 0xbe5cb7f
  1d:	41 56                	push   %r14
  1f:	48 8b 14 dd 60 0d 1b 	mov    -0x73e4f2a0(,%rbx,8),%rdx
  26:	8c
  27:	4c 89 e6             	mov    %r12,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	58                   	pop    %rax
  30:	83 05 2c 8c db 0b 01 	addl   $0x1,0xbdb8c2c(%rip)        # 0xbdb8c63
  37:	48 83 c4 18          	add    $0x18,%rsp
  3b:	5b                   	pop    %rbx
  3c:	5d                   	pop    %rbp
  3d:	41 5c                	pop    %r12
  3f:	41                   	rex.B