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ODEBUG: free active (active state 0) object: ffff88805ed44490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 22251 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 22251 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 22251 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 22251 Comm: syz.2.3193 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 c0 74 fc 8a 48 c7 c6 20 71 fc 8a 48 c7 c2 40 76 fc 8a 8b 0c 24 4d 89 f8 41 55 e8 6e dd 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 92 24
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: 31fa7270337c5000 RBX: ffffffff97162d48 RCX: ffff88802af99e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9f00 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff88805ed44600
R13: ffffffff89678f70 R14: ffff88805ed44000 R15: ffff88805ed44490
FS: 000055557996d500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005652093e4c70 CR3: 0000000069582000 CR4: 00000000003506e0
Call Trace:
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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lockdep_unregister_key+0x4e6/0x580 kernel/locking/lockdep.c:6490
Code: 84 d5 90 48 c7 c6 60 a3 67 81 e8 45 12 08 00 e8 10 25 08 00 e9 67 fc ff ff e8 f6 2a 07 09 41 f7 c4 00 02 00 00 74 d1 fb 84 db <75> d0 eb e1 0f 0b 31 db eb a1 0f 0b e9 fd fe ff ff e8 d4 29 07 09
RSP: 0018:ffffc9000332f8a0 EFLAGS: 00000246
RAX: 31fa7270337c5000 RBX: 0000000000000000 RCX: 31fa7270337c5000
RDX: 0000000000000001 RSI: ffffffff8aaac9c0 RDI: ffffffff8afc6b00
RBP: ffffc9000332f980 R08: ffffffff90d59c5f R09: 1ffffffff21ab38b
R10: dffffc0000000000 R11: fffffbfff21ab38c R12: 0000000000000a02
R13: ffffffff9078c3d0 R14: ffff88814ccfb299 R15: 1ffff92000665f18
__qdisc_destroy+0x128/0x3c0 net/sched/sch_generic.c:1078
netdev_for_each_tx_queue include/linux/netdevice.h:2520 [inline]
dev_shutdown+0x96/0x440 net/sched/sch_generic.c:1489
unregister_netdevice_many_notify+0x8d2/0x1810 net/core/dev.c:11076
unregister_netdevice_many net/core/dev.c:11142 [inline]
unregister_netdevice_queue+0x324/0x360 net/core/dev.c:11022
unregister_netdevice include/linux/netdevice.h:3137 [inline]
__tun_detach+0xd45/0x1500 drivers/net/tun.c:685
tun_detach drivers/net/tun.c:701 [inline]
tun_chr_close+0x10d/0x1c0 drivers/net/tun.c:3511
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc493d8f6c9
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:00007ffd9b7545f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00000000001a9e19 RCX: 00007fc493d8f6c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc493fe7da0 R08: 0000000000000001 R09: 0000000b9b7548ef
R10: 0000001b31b20000 R11: 0000000000000246 R12: 00007fc493fe5fac
R13: 00007fc493fe5fa0 R14: ffffffffffffffff R15: 00007ffd9b754710
----------------
Code disassembly (best guess):
0: 84 d5 test %dl,%ch
2: 90 nop
3: 48 c7 c6 60 a3 67 81 mov $0xffffffff8167a360,%rsi
a: e8 45 12 08 00 call 0x81254
f: e8 10 25 08 00 call 0x82524
14: e9 67 fc ff ff jmp 0xfffffc80
19: e8 f6 2a 07 09 call 0x9072b14
1e: 41 f7 c4 00 02 00 00 test $0x200,%r12d
25: 74 d1 je 0xfffffff8
27: fb sti
28: 84 db test %bl,%bl
* 2a: 75 d0 jne 0xfffffffc <-- trapping instruction
2c: eb e1 jmp 0xf
2e: 0f 0b ud2
30: 31 db xor %ebx,%ebx
32: eb a1 jmp 0xffffffd5
34: 0f 0b ud2
36: e9 fd fe ff ff jmp 0xffffff38
3b: e8 d4 29 07 09 call 0x9072a14