syzbot

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ODEBUG: free active (active state 0) object: ffff88805ced9cd0 object type: timer_list hint: rose_t0timer_expiry+0x0/0x360 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 16 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 37 b5 96 fd 4d 8b 0f 48 c7 c7 00 57 3f 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 9a 4b f9 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 47 8c 6d 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000157708 EFLAGS: 00010282
RAX: 5023c24d9de8a400 RBX: dffffc0000000000 RCX: ffff88801baa5a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000100
R10: dffffc0000000000 R11: ffffed101710487b R12: ffffffff89b92480
R13: ffffffff8b3f5880 R14: ffff88805ced9cd0 R15: ffffffff8aecf760
FS:  0000000000000000(0000) GS:ffff888126bc9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f9391e2a38 CR3: 0000000026a72000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2454 [inline]
 slab_free mm/slub.c:6611 [inline]
 kfree+0x114/0x950 mm/slub.c:6818
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x648/0x970 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x22f/0x710 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 run_ktimerd+0xcf/0x190 kernel/softirq.c:1138
 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>