------------[ 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: 5233 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 5233 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 5233 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 5233 Comm: kworker/u4:34 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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 88 b6 bd fd 4c 8b 45 00 48 c7 c7 80 16 df 8a 48 c7 c6 40 13 df 8a 48 c7 c2 e0 17 df 8a 8b 0c 24 4d 89 e9 e8 e4 1b 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 65 4a 0a
RSP: 0018:ffffc90000007a10 EFLAGS: 00010246
RAX: a0cdf4ba4b3bb200 RBX: ffffffff96e20520 RCX: ffff888059139dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8dedc0 R08: ffffc90000007687 R09: 1ffff92000000ed0
R10: dffffc0000000000 R11: fffff52000000ed1 R12: ffff888058521e00
R13: ffffffff892b51e0 R14: ffff888058521000 R15: ffff888058521c90
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5192fadd58 CR3: 0000000058216000 CR4: 00000000003526f0
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+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 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:get_current kernel/rcu/tree_plugin.h:401 [inline]
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:379 [inline]
RIP: 0010:__rcu_read_lock+0x0/0x50 kernel/rcu/tree_plugin.h:402
Code: fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 0f fb ff ff 4c 89 f7 e8 01 46 66 00 e9 02 fb ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 <53> 65 48 8b 1d 57 35 95 7e 48 81 c3 3c 04 00 00 48 89 d8 48 c1 e8
RSP: 0018:ffffc9000d857bd8 EFLAGS: 00000282
RAX: 1ffff11005286f68 RBX: ffff888029437b40 RCX: ffff888059139dc0
RDX: 0000000000000000 RSI: ffffffff8a8c2220 RDI: ffffffff8adf0d20
RBP: ffff88805827de20 R08: ffffffff8e1fdeef R09: 1ffffffff1c3fbdd
R10: dffffc0000000000 R11: fffffbfff1c3fbde R12: dffffc0000000000
R13: ffff888029437b50 R14: ffff888026e3cc80 R15: 00000000000003c4
 rcu_read_lock include/linux/rcupdate.h:789 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0xc7/0x600 net/batman-adv/network-coding.c:719
 process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1270 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), 2 bytes skipped:
   0:	ff 44 89 f1          	incl   -0xf(%rcx,%rcx,4)
   4:	80 e1 07             	and    $0x7,%cl
   7:	38 c1                	cmp    %al,%cl
   9:	0f 8c 0f fb ff ff    	jl     0xfffffb1e
   f:	4c 89 f7             	mov    %r14,%rdi
  12:	e8 01 46 66 00       	call   0x664618
  17:	e9 02 fb ff ff       	jmp    0xfffffb1e
  1c:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  23:	00 00 00
  26:	66 90                	xchg   %ax,%ax
* 28:	53                   	push   %rbx <-- trapping instruction
  29:	65 48 8b 1d 57 35 95 	mov    %gs:0x7e953557(%rip),%rbx        # 0x7e953588
  30:	7e
  31:	48 81 c3 3c 04 00 00 	add    $0x43c,%rbx
  38:	48 89 d8             	mov    %rbx,%rax
  3b:	48                   	rex.W
  3c:	c1                   	.byte 0xc1
  3d:	e8                   	.byte 0xe8