------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807aaa1490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 0 PID: 31849 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 31849 Comm: syz.1.6421 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd a0 f3 f1 8b 4c 89 e6 48 c7 c7 20 e8 f1 8b e8 6f e1 c7 fc 90 <0f> 0b 90 90 58 83 05 76 d2 cf 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000007a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b6ee8
RDX: ffff8880306d4900 RSI: ffffffff817b6ef5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000bac90 R12: ffffffff8bf1eec0
R13: ffffffff8b901fe0 R14: ffffffff8a533bd0 R15: ffffc90000007b18
FS:  00007fa1cc5956c0(0000) GS:ffff8881249d9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e014ff8 CR3: 000000005f655000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2454 [inline]
 slab_free mm/slub.c:6611 [inline]
 kfree+0x291/0x6d0 mm/slub.c:6818
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
 call_timer_fn+0x19a/0x620 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers+0x6ef/0x960 kernel/time/timer.c:2372
 __run_timer_base kernel/time/timer.c:2384 [inline]
 __run_timer_base kernel/time/timer.c:2376 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2393
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:finish_task_switch.isra.0+0x22a/0xc10 kernel/sched/core.c:5193
Code: fb 09 00 00 44 8b 05 39 f6 f8 0e 45 85 c0 0f 85 be 01 00 00 4c 89 e7 e8 a4 f6 ff ff e8 2f d2 3a 00 fb 65 48 8b 1d de 07 1a 12 <48> 8d bb 58 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc900055775a8 EFLAGS: 00000206
RAX: 0000000000038c4b RBX: ffff8880306d4900 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8db0330f RDI: ffffffff8bf1e2c0
RBP: ffffc900055775f0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90832dd7 R11: 0000000000000001 R12: ffff8880b843a380
R13: ffff888027098000 R14: 0000000000000000 R15: dffffc0000000000
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x1198/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7113
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
 __unix_dgram_recvmsg+0x315/0xc30 net/unix/af_unix.c:2626
 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2700
 sock_recvmsg_nosec net/socket.c:1078 [inline]
 ____sys_recvmsg+0x5f9/0x6b0 net/socket.c:2848
 ___sys_recvmsg+0x114/0x1a0 net/socket.c:2892
 do_recvmmsg+0x2fe/0x750 net/socket.c:2987
 __sys_recvmmsg net/socket.c:3061 [inline]
 __do_sys_recvmmsg net/socket.c:3084 [inline]
 __se_sys_recvmmsg net/socket.c:3077 [inline]
 __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3077
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1cb78eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1cc595038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fa1cb9e6090 RCX: 00007fa1cb78eec9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007fa1cb811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa1cb9e6128 R14: 00007fa1cb9e6090 R15: 00007fffe6844938
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	44 8b 05 39 f6 f8 0e 	mov    0xef8f639(%rip),%r8d        # 0xef8f642
   9:	45 85 c0             	test   %r8d,%r8d
   c:	0f 85 be 01 00 00    	jne    0x1d0
  12:	4c 89 e7             	mov    %r12,%rdi
  15:	e8 a4 f6 ff ff       	call   0xfffff6be
  1a:	e8 2f d2 3a 00       	call   0x3ad24e
  1f:	fb                   	sti
  20:	65 48 8b 1d de 07 1a 	mov    %gs:0x121a07de(%rip),%rbx        # 0x121a0806
  27:	12
* 28:	48 8d bb 58 16 00 00 	lea    0x1658(%rbx),%rdi <-- trapping instruction
  2f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  36:	fc ff df
  39:	48 89 fa             	mov    %rdi,%rdx
  3c:	48                   	rex.W
  3d:	c1                   	.byte 0xc1