------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: rose_transmit_restart_request net/rose/rose_link.c:-1 [inline]
ODEBUG: free active (active state 0) object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:284
WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
RIP: 0010:debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 18 56 c5 fd 4c 8b 45 00 48 c7 c7 20 08 bf 8a 48 c7 c6 e0 04 bf 8a 48 c7 c2 80 09 bf 8a 8b 0c 24 4d 89 e9 e8 e4 26 41 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 95 73 f3
RSP: 0018:ffffc90000007a10 EFLAGS: 00010246
RAX: 159c53fda6bfd800 RBX: ffffffff96ce9da0 RCX: ffffffff8c6bc740
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a6de320 R08: dffffc0000000000 R09: fffff52000000ee1
R10: fffff52000000ee1 R11: 1ffff92000000ee0 R12: ffff888056f75a00
R13: ffffffff891264c0 R14: ffff888056f75000 R15: ffff888056f75890
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f919ff8 CR3: 000000000c68e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:1704 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4a7/0x5d0 net/rose/rose_timer.c:183
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x529/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:sched_core_balance+0x151/0xdc0 kernel/sched/core.c:6237
Code: 6b 8a e8 e2 d7 09 00 4c 89 7c 24 38 4c 89 6c 24 28 e9 f4 0b 00 00 48 8b 7c 24 40 e8 09 3c c1 08 e8 34 65 2d 00 fb 41 83 fd 08 <0f> 83 c1 0b 00 00 4e 8d 34 fd 80 a9 3d 8c 4c 89 f0 48 c1 e8 03 48
RSP: 0018:ffffffff8c607a20 EFLAGS: 00000293
RAX: 159c53fda6bfd800 RBX: ffff8880b8e3b848 RCX: 159c53fda6bfd800
RDX: dffffc0000000000 RSI: ffffffff8a6c0600 RDI: ffffffff8abefec0
RBP: ffffffff8c607ba0 R08: dffffc0000000000 R09: ffffed10171c7561
R10: ffffed10171c7561 R11: 1ffff110171c7560 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880b8e27758 R15: 0000000000000000
 do_balance_callbacks kernel/sched/core.c:4893 [inline]
 __balance_callbacks+0x103/0x190 kernel/sched/core.c:4947
 __schedule+0x1374/0x40b0 kernel/sched/core.c:6567
 schedule_idle+0x4a/0x90 kernel/sched/core.c:6666
 do_idle+0x525/0x570 kernel/sched/idle.c:331
 cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401
 rest_init+0x2dc/0x300 init/main.c:745
 arch_call_rest_init+0xa/0xa init/main.c:905
 start_kernel+0x490/0x539 init/main.c:1152
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
----------------
Code disassembly (best guess):
   0:	6b 8a e8 e2 d7 09 00 	imul   $0x0,0x9d7e2e8(%rdx),%ecx
   7:	4c 89 7c 24 38       	mov    %r15,0x38(%rsp)
   c:	4c 89 6c 24 28       	mov    %r13,0x28(%rsp)
  11:	e9 f4 0b 00 00       	jmp    0xc0a
  16:	48 8b 7c 24 40       	mov    0x40(%rsp),%rdi
  1b:	e8 09 3c c1 08       	call   0x8c13c29
  20:	e8 34 65 2d 00       	call   0x2d6559
  25:	fb                   	sti
  26:	41 83 fd 08          	cmp    $0x8,%r13d
* 2a:	0f 83 c1 0b 00 00    	jae    0xbf1 <-- trapping instruction
  30:	4e 8d 34 fd 80 a9 3d 	lea    -0x73c25680(,%r15,8),%r14
  37:	8c
  38:	4c 89 f0             	mov    %r14,%rax
  3b:	48 c1 e8 03          	shr    $0x3,%rax
  3f:	48                   	rex.W