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ODEBUG: free active (active state 0) object: ffff88801f6d6490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 14944 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 14944 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 14944 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 14944 Comm: syz.0.1583 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Code: 4c 8b 4d 00 48 c7 c7 00 79 fc 8a 48 c7 c6 60 75 fc 8a 48 c7 c2 80 7a fc 8a 8b 0c 24 4d 89 f8 41 55 e8 9e b9 29 fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 a3 5f 24
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: 2d946ea8fa636200 RBX: ffffffff97112d00 RCX: ffff88802b693c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9f00 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff88801f6d6600
R13: ffffffff8967e2e0 R14: ffff88801f6d6000 R15: ffff88801f6d6490
FS:  00007f66e34d46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c30bbc3 CR3: 00000000600d5000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1f0 mm/slub.c:3843
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4c6/0x5f0 net/rose/rose_timer.c:183
 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x52d/0x7d0 kernel/time/timer.c:2022
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x60 kernel/kcov.c:219
Code: 8b 15 31 15 7e 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 <48> 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39
RSP: 0018:ffffc900038cfd08 EFLAGS: 00000246
RAX: ffffffff85a7c5ad RBX: 0000000000000002 RCX: ffff88802b693c00
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900038cfdf0 R08: ffff888066bc803f R09: 1ffff1100cd79007
R10: dffffc0000000000 R11: ffffed100cd79008 R12: ffff88806c7e6500
R13: 1ffff1100cd79292 R14: dffffc0000000000 R15: ffff888066bc8000
 tun_set_iff+0xa6d/0xed0 drivers/net/tun.c:2881
 __tun_chr_ioctl+0x7ac/0x1fd0 drivers/net/tun.c:3131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f66e258f749
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:00007f66e34d4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f66e27e5fa0 RCX: 00007f66e258f749
RDX: 0000200000000040 RSI: 00000000400454ca RDI: 0000000000000005
RBP: 00007f66e2613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f66e27e6038 R14: 00007f66e27e5fa0 R15: 00007ffc652909e8
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 15 31 15 7e 7e    	mov    0x7e7e1531(%rip),%edx        # 0x7e7e1537
   6:	81 e2 00 01 ff 00    	and    $0xff0100,%edx
   c:	74 11                	je     0x1f
   e:	81 fa 00 01 00 00    	cmp    $0x100,%edx
  14:	75 35                	jne    0x4b
  16:	83 b9 1c 16 00 00 00 	cmpl   $0x0,0x161c(%rcx)
  1d:	74 2c                	je     0x4b
  1f:	8b 91 f8 15 00 00    	mov    0x15f8(%rcx),%edx
  25:	83 fa 02             	cmp    $0x2,%edx
  28:	75 21                	jne    0x4b
* 2a:	48 8b 91 00 16 00 00 	mov    0x1600(%rcx),%rdx <-- trapping instruction
  31:	48 8b 32             	mov    (%rdx),%rsi
  34:	48 8d 7e 01          	lea    0x1(%rsi),%rdi
  38:	8b 89 fc 15 00 00    	mov    0x15fc(%rcx),%ecx
  3e:	48                   	rex.W
  3f:	39                   	.byte 0x39