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ODEBUG: free active (active state 0) object: ffff888052a80090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 0 PID: 5193 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 5193 Comm: udevd 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 20 87 f0 8b 4c 89 e6 48 c7 c7 a0 7b f0 8b e8 6f a9 d0 fc 90 <0f> 0b 90 90 58 83 05 56 f0 d7 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000007a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b2ee8
RDX: ffff88807d1d8000 RSI: ffffffff817b2ef5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8bf08240
R13: ffffffff8b9021a0 R14: ffffffff8a4bba80 R15: ffffc90000007b18
FS:  00007faca6f85880(0000) GS:ffff888124a07000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f747bdb6358 CR3: 000000002f8ec000 CR4: 0000000000350ef0
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:2470 [inline]
 slab_free mm/slub.c:6630 [inline]
 kfree+0x291/0x6d0 mm/slub.c:6837
 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:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: b4 08 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 12 68 e9 0e 0f 82 74 02 00 00 8b 35 6a 98 e9 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 29 b4 08 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90003fafb00 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffff888148e900d0 RCX: ffffffff93a874a0
RDX: 0000000000000000 RSI: ffffffff8da04a53 RDI: ffffffff8bf07640
RBP: 0000000000000000 R08: 2aa30fc714a0b5f6 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 fast_dput fs/dcache.c:827 [inline]
 dput.part.0+0x766/0x9b0 fs/dcache.c:905
 dput+0x1f/0x30 fs/dcache.c:901
 path_put fs/namei.c:626 [inline]
 terminate_walk+0x489/0x680 fs/namei.c:756
 path_lookupat+0x18b/0x6d0 fs/namei.c:2693
 filename_lookup+0x224/0x5f0 fs/namei.c:2705
 do_readlinkat+0xce/0x3a0 fs/stat.c:576
 __do_sys_readlink fs/stat.c:613 [inline]
 __se_sys_readlink fs/stat.c:610 [inline]
 __x64_sys_readlink+0x78/0xc0 fs/stat.c:610
 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: 0033:0x7faca69153a7
Code: 00 00 90 48 83 ec 10 48 63 ff 45 31 c9 45 31 c0 6a 00 31 c9 e8 8a 20 f9 ff 48 83 c4 18 c3 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 21 ba 0d 00 f7 d8 64 89 02 48
RSP: 002b:00007ffdfead2ed8 EFLAGS: 00000202 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffdfead3720 RCX: 00007faca69153a7
RDX: 0000000000000400 RSI: 00007ffdfead32e0 RDI: 00007ffdfead2ee0
RBP: 0000000000000200 R08: 000055ae74a0ac29 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdfead2ee0
R13: 00007ffdfead32e0 R14: 0000000000000001 R15: 00007ffdfead3b50
 </TASK>
----------------
Code disassembly (best guess):
   0:	b4 08                	mov    $0x8,%ah
   2:	12 83 f8 07 0f 87    	adc    -0x78f0f808(%rbx),%al
   8:	bc 02 00 00 89       	mov    $0x89000002,%esp
   d:	c0 48 0f a3          	rorb   $0xa3,0xf(%rax)
  11:	05 12 68 e9 0e       	add    $0xee96812,%eax
  16:	0f 82 74 02 00 00    	jb     0x290
  1c:	8b 35 6a 98 e9 0e    	mov    0xee9986a(%rip),%esi        # 0xee9988c
  22:	85 f6                	test   %esi,%esi
  24:	0f 85 8d 00 00 00    	jne    0xb7
* 2a:	48 8b 44 24 30       	mov    0x30(%rsp),%rax <-- trapping instruction
  2f:	65 48 2b 05 29 b4 08 	sub    %gs:0x1208b429(%rip),%rax        # 0x1208b460
  36:	12
  37:	0f 85 c7 02 00 00    	jne    0x304
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c4                   	.byte 0xc4