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ODEBUG: free active (active state 0) object: ffff88816b1d1890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550, CPU#1: syz.1.4682/23502
Modules linked in:
CPU: 1 UID: 0 PID: 23502 Comm: syz.1.4682 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550
Code: 89 44 24 20 e8 37 6f 77 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 b0 27 8c 48 c7 c2 c0 b5 27 8c 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90000a08b68 EFLAGS: 00010246
RAX: ffffffff8a955bb0 RBX: ffffffff9a5233b8 RCX: 0000000000000000
RDX: ffffffff8c27b5c0 RSI: ffffffff8c27b040 RDI: ffffffff901c4580
RBP: ffffffff8bcf3c40 R08: ffff88816b1d1890 R09: ffffffff8bcf4f60
R10: dffffc0000000000 R11: ffffffff81b1d860 R12: ffff88816b1d1a00
R13: ffffffff901c4580 R14: ffff88816b1d1000 R15: ffff88816b1d1890
FS:  000055557507f500(0000) GS:ffff8882a9464000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fb0cff8 CR3: 0000000113bda000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 kfree+0x13a/0x630
 rose_timer_expiry+0x4cb/0x600
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lockdep_unregister_key+0x2d5/0x350
Code: 41 0c 09 00 89 c6 48 c7 c7 d0 18 24 96 e8 a3 3b 0e 0a 90 e9 65 fe ff ff e8 f8 92 0b 0a 41 f7 c7 00 02 00 00 74 b3 fb 40 84 ed <75> b2 eb c3 90 0f 0b 90 e9 26 ff ff ff 90 0f 0b 90 e9 2e ff ff ff
RSP: 0018:ffffc9002b88f980 EFLAGS: 00000246
RAX: 0000000000000046 RBX: ffff88801222e268 RCX: 0000000000000046
RDX: ffffffff93df9438 RSI: ffffffff8df0c33d RDI: ffffffff8c27aa00
RBP: ffff888012a9d700 R08: ffffffff81aef2a8 R09: ffffffff8e7602e0
R10: dffffc0000000000 R11: fffffbfff20230d7 R12: 0000000000000000
R13: ffff88801222e269 R14: 0000000000001000 R15: 0000000000000a87
 __qdisc_destroy+0x1ab/0x4a0
 dev_shutdown+0x93/0x440
 unregister_netdevice_many_notify+0x11a9/0x2370
 unregister_netdevice_queue+0x31f/0x360
 __tun_detach+0x6d9/0x15d0
 tun_chr_close+0x10a/0x1c0
 __fput+0x44f/0xa70
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea4859c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc436e4e58 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffc436e4f40 RCX: 00007fea4859c799
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000005750e R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2ec20000 R11: 0000000000000246 R12: 00007ffc436e4f80
R13: 00007fea48815fac R14: 000000000005757c R15: 00007fea48815fa0
 </TASK>
