------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888078929090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#0: syz-executor/19426
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#0: syz-executor/19426
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#0: syz-executor/19426
Modules linked in:
CPU: 0 UID: 0 PID: 19426 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1146
Code: 89 44 24 20 e8 27 2c 77 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 c0 bb 27 8c 48 c7 c2 40 c1 27 8c 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90000007b68 EFLAGS: 00010246
RAX: ffffffff8a95ffe0 RBX: ffffffff9a4bcb90 RCX: 0000000000000000
RDX: ffffffff8c27c140 RSI: ffffffff8c27bbc0 RDI: ffffffff901c58a0
RBP: ffffffff8bcf3ce0 R08: ffff888078929090 R09: ffffffff8bcf5000
R10: dffffc0000000000 R11: ffffffff81b1e6a0 R12: ffff888078929200
R13: ffffffff901c58a0 R14: ffff888078929000 R15: ffff888078929090
FS:  0000555564a50500(0000) GS:ffff888125460000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcfab3e7158 CR3: 0000000059234000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2623 [inline]
 slab_free mm/slub.c:6168 [inline]
 kfree+0x13a/0x630 mm/slub.c:6486
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/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+0xa6/0xc0 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194
Code: f7 e8 2d 8d f1 f5 f7 c3 00 02 00 00 74 05 e8 a0 e4 1c f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 64 4b e3 f5 65 8b 05 0d 60 6b 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc90003537818 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000292 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8def5786 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff901196b7 R09: 1ffffffff20232d6
R10: dffffc0000000000 R11: fffffbfff20232d7 R12: ffff88801b33a360
R13: ffff88801b33a300 R14: ffffffff9a503440 R15: 0000000000000001
 __debug_check_no_obj_freed lib/debugobjects.c:1125 [inline]
 debug_check_no_obj_freed+0x52e/0x550 lib/debugobjects.c:1146
 slab_free_hook mm/slub.c:2623 [inline]
 slab_free mm/slub.c:6168 [inline]
 kfree+0x13a/0x630 mm/slub.c:6486
 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:882 [inline]
 get_entries net/ipv6/netfilter/ip6_tables.c:1039 [inline]
 do_ip6t_get_ctl+0xf14/0x1230 net/ipv6/netfilter/ip6_tables.c:1677
 nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
 ipv6_getsockopt+0x1fd/0x2b0 net/ipv6/ipv6_sockglue.c:1473
 do_sock_getsockopt+0x2d3/0x3f0 net/socket.c:2383
 __sys_getsockopt net/socket.c:2412 [inline]
 __do_sys_getsockopt net/socket.c:2419 [inline]
 __se_sys_getsockopt net/socket.c:2416 [inline]
 __x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2416
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcfab19df6a
Code: 48 83 ec 10 89 d2 48 63 ff 45 31 c9 6a 2a 45 31 c0 31 c9 e8 d8 99 fb ff 48 83 c4 18 c3 0f 1f 00 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7
RSP: 002b:00007fffb50c3178 EFLAGS: 00000212 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007fffb50c3200 RCX: 00007fcfab19df6a
RDX: 0000000000000041 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007fffb50c319c R09: 0000000000000000
R10: 00007fffb50c3200 R11: 0000000000000212 R12: 00007fcfab3e7e00
R13: 00007fffb50c319c R14: 0000000000000000 R15: 00007fcfab3e9fc0
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 27 2c 77 fd       	call   0xfd772c30
   9:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
   e:	4c 8b 4d 00          	mov    0x0(%rbp),%r9
  12:	4c 89 ef             	mov    %r13,%rdi
  15:	48 c7 c6 c0 bb 27 8c 	mov    $0xffffffff8c27bbc0,%rsi
  1c:	48 c7 c2 40 c1 27 8c 	mov    $0xffffffff8c27c140,%rdx
  23:	8b 0c 24             	mov    (%rsp),%ecx
  26:	4d 89 f8             	mov    %r15,%r8
  29:	50                   	push   %rax
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	4c 8b 6c 24 18       	mov    0x18(%rsp),%r13
  38:	48                   	rex.W
  39:	b9 00 00 00 00       	mov    $0x0,%ecx
  3e:	00 fc                	add    %bh,%ah