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ODEBUG: free active (active state 0) object: ffff888040f31c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 1 PID: 26486 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 26486 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 a0 f4 f1 8b 4c 89 e6 48 c7 c7 20 e9 f1 8b e8 2f de c7 fc 90 <0f> 0b 90 90 58 83 05 36 cf cf 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000a08a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b6ee8
RDX: ffff888030494900 RSI: ffffffff817b6ef5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000009b50 R12: ffffffff8bf1efc0
R13: ffffffff8b901fe0 R14: ffffffff8a533f10 R15: ffffc90000a08b18
FS:  00007f4c6cded880(0000) GS:ffff888124ad9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c6bccd170 CR3: 000000007f498000 CR4: 00000000003526f0
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:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline]
RIP: 0010:__follow_mount_rcu fs/namei.c:1610 [inline]
RIP: 0010:handle_mounts fs/namei.c:1635 [inline]
RIP: 0010:step_into+0xe1b/0x21a0 fs/namei.c:1989
Code: 48 8b 75 08 4c 89 e7 e8 d3 e8 5c ff 9c 41 5c 41 81 e4 00 02 00 00 31 ff 4c 89 e6 e8 af 0a 81 ff 58 4d 85 e4 0f 85 00 04 00 00 <e8> 30 0f 81 ff 4d 8d 7d 08 4c 89 f8 48 c1 e8 03 42 0f b6 0c 30 4c
RSP: 0018:ffffc9000c1ff8b8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffc9000c1ffb30 RCX: ffffffff823c2b98
RDX: ffff888030494900 RSI: ffffffff823c2ba7 RDI: 0000000000000007
RBP: ffffc9000c1ff9b8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888031184bc0 R14: dffffc0000000000 R15: 0000000000000200
 walk_component+0xfc/0x5b0 fs/namei.c:2157
 link_path_walk+0x627/0xe20 fs/namei.c:2519
 path_lookupat+0x15a/0x6d0 fs/namei.c:2675
 filename_lookup+0x224/0x5f0 fs/namei.c:2705
 vfs_statx+0x101/0x3f0 fs/stat.c:353
 vfs_fstatat+0x7b/0xf0 fs/stat.c:375
 __do_sys_newfstatat+0x97/0x120 fs/stat.c:542
 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: 0033:0x7f4c6c711b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffccdeb6a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00005602444472c0 RCX: 00007f4c6c711b0a
RDX: 00007ffccdeb6a40 RSI: 00007ffccdeb6ad0 RDI: 00000000ffffff9c
RBP: 0000560244441c20 R08: 00005602444472c0 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 0000560244441d10
R13: 00007ffccdeb6ad0 R14: 00005602276bbca4 R15: 00005602276bbbcc
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 8b 75 08          	mov    0x8(%rbp),%rsi
   4:	4c 89 e7             	mov    %r12,%rdi
   7:	e8 d3 e8 5c ff       	call   0xff5ce8df
   c:	9c                   	pushf
   d:	41 5c                	pop    %r12
   f:	41 81 e4 00 02 00 00 	and    $0x200,%r12d
  16:	31 ff                	xor    %edi,%edi
  18:	4c 89 e6             	mov    %r12,%rsi
  1b:	e8 af 0a 81 ff       	call   0xff810acf
  20:	58                   	pop    %rax
  21:	4d 85 e4             	test   %r12,%r12
  24:	0f 85 00 04 00 00    	jne    0x42a
* 2a:	e8 30 0f 81 ff       	call   0xff810f5f <-- trapping instruction
  2f:	4d 8d 7d 08          	lea    0x8(%r13),%r15
  33:	4c 89 f8             	mov    %r15,%rax
  36:	48 c1 e8 03          	shr    $0x3,%rax
  3a:	42 0f b6 0c 30       	movzbl (%rax,%r14,1),%ecx
  3f:	4c                   	rex.WR