------------[ 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: 6392 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 6392 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 6392 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 6392 Comm: kworker/u4:21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: bat_events batadv_nc_worker
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 f8 72 c5 fd 4c 8b 45 00 48 c7 c7 00 06 df 8a 48 c7 c6 c0 02 df 8a 48 c7 c2 60 07 df 8a 8b 0c 24 4d 89 e9 e8 a4 7d 41 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 55 2d 14
RSP: 0018:ffffc90000007a10 EFLAGS: 00010246
RAX: 5cefd69cd7ac8000 RBX: ffffffff96e77d28 RCX: ffff888026621dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8de220 R08: dffffc0000000000 R09: fffff52000000ed1
R10: fffff52000000ed1 R11: 1ffff92000000ed0 R12: ffff888020c30e00
R13: ffffffff8918ff80 R14: ffff888020c30000 R15: ffff888020c30c90
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc4dfda4198 CR3: 000000000c88e000 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:__rcu_read_unlock+0x2/0xd0 kernel/rcu/tree_plugin.h:419
Code: 11 ff 03 8b 03 3d 00 00 00 40 7d 02 5b c3 0f 0b eb fa 89 d9 80 e1 07 80 c1 03 38 c1 7c e3 48 89 df e8 52 19 65 00 eb d9 41 57 <41> 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3d 55
RSP: 0018:ffffc90004bffbd0 EFLAGS: 00000293
RAX: ffffffff89e15a7d RBX: ffff888025c23840 RCX: ffff888026621dc0
RDX: 0000000000000000 RSI: ffffffff8adefc80 RDI: ffffffff8adefc40
RBP: fffffffffffffe38 R08: dffffc0000000000 R09: fffffbfff215c449
R10: fffffbfff215c449 R11: 1ffffffff215c448 R12: dffffc0000000000
R13: ffffffff89e1593e R14: ffff888056b30c80 R15: 0000000000000052
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0x27e/0x600 net/batman-adv/network-coding.c:719
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	11 ff                	adc    %edi,%edi
   2:	03 8b 03 3d 00 00    	add    0x3d03(%rbx),%ecx
   8:	00 40 7d             	add    %al,0x7d(%rax)
   b:	02 5b c3             	add    -0x3d(%rbx),%bl
   e:	0f 0b                	ud2
  10:	eb fa                	jmp    0xc
  12:	89 d9                	mov    %ebx,%ecx
  14:	80 e1 07             	and    $0x7,%cl
  17:	80 c1 03             	add    $0x3,%cl
  1a:	38 c1                	cmp    %al,%cl
  1c:	7c e3                	jl     0x1
  1e:	48 89 df             	mov    %rbx,%rdi
  21:	e8 52 19 65 00       	call   0x651978
  26:	eb d9                	jmp    0x1
  28:	41 57                	push   %r15
* 2a:	41 56                	push   %r14 <-- trapping instruction
  2c:	41 55                	push   %r13
  2e:	41 54                	push   %r12
  30:	53                   	push   %rbx
  31:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  38:	fc ff df
  3b:	65                   	gs
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	3d                   	.byte 0x3d
  3f:	55                   	push   %rbp