------------[ 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 08/18/2025
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 38 79 c5 fd 4c 8b 45 00 48 c7 c7 80 06 df 8a 48 c7 c6 40 03 df 8a 48 c7 c2 e0 07 df 8a 8b 0c 24 4d 89 e9 e8 04 78 41 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 75 17 14
RSP: 0000:ffffc90000007a10 EFLAGS: 00010246
RAX: 9795504dfd89cd00 RBX: ffffffff96e21f38 RCX: ffffffff8c8bc680
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8de220 R08: dffffc0000000000 R09: fffff52000000ed1
R10: fffff52000000ed1 R11: 1ffff92000000ed0 R12: ffff888057025600
R13: ffffffff89192300 R14: ffff888057025000 R15: ffff888057025490
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29465721e0 CR3: 000000002e76d000 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:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 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:flush_smp_call_function_queue+0x1f7/0x340 kernel/smp.c:728
Code: 00 4d 85 f6 75 16 e8 d8 f2 0a 00 eb 15 e8 d1 f2 0a 00 e8 8c b6 a1 08 4d 85 f6 74 ea e8 c2 f2 0a 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 66 43 c7 44 25 09 00 00 43 c6 44 25 0b
RSP: 0000:ffffffff8c807ce0 EFLAGS: 00000293
RAX: ffffffff8175dc2e RBX: 0000000000000000 RCX: ffffffff8c8bc680
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8c807d90 R08: dffffc0000000000 R09: fffff5200078cf6e
R10: fffff5200078cf6e R11: 1ffff9200078cf6d R12: dffffc0000000000
R13: 1ffffffff1900f9c R14: 0000000000000200 R15: 1ffffffff1c3ecf6
 do_idle+0x520/0x570 kernel/sched/idle.c:330
 cpu_startup_entry+0x3f/0x60 kernel/sched/idle.c:401
 rest_init+0x2dc/0x300 init/main.c:733
 arch_call_rest_init+0xa/0xa init/main.c:893
 start_kernel+0x490/0x539 init/main.c:1140
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 4d 85             	add    %cl,-0x7b(%rbp)
   3:	f6 75 16             	divb   0x16(%rbp)
   6:	e8 d8 f2 0a 00       	call   0xaf2e3
   b:	eb 15                	jmp    0x22
   d:	e8 d1 f2 0a 00       	call   0xaf2e3
  12:	e8 8c b6 a1 08       	call   0x8a1b6a3
  17:	4d 85 f6             	test   %r14,%r14
  1a:	74 ea                	je     0x6
  1c:	e8 c2 f2 0a 00       	call   0xaf2e3
  21:	fb                   	sti
  22:	48 c7 04 24 0e 36 e0 	movq   $0x45e0360e,(%rsp)
  29:	45
* 2a:	4b c7 44 25 00 00 00 	movq   $0x0,0x0(%r13,%r12,1) <-- trapping instruction
  31:	00 00
  33:	66 43 c7 44 25 09 00 	movw   $0x0,0x9(%r13,%r12,1)
  3a:	00
  3b:	43                   	rex.XB
  3c:	c6                   	.byte 0xc6
  3d:	44                   	rex.R
  3e:	25                   	.byte 0x25
  3f:	0b                   	.byte 0xb