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ODEBUG: free active (active state 0) object: ffff888054de4490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 23213 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 23213 Comm: syz.5.4752 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+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 77 e4 92 fd 4d 8b 0f 48 c7 c7 80 0f bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 4a 4b f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 57 32 ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: ccdcd281f6f07100 RBX: dffffc0000000000 RCX: ffff888029778000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba650 R12: ffffffff8a3925a0
R13: ffffffff8bbf1100 R14: ffff888054de4490 R15: ffffffff8b6cf600
FS: 0000555577d9d500(0000) GS:ffff88812623d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557079c5c8 CR3: 0000000054d5e000 CR4: 00000000003526f0
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2470 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x115/0x6d0 mm/slub.c:6837
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 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+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lockdep_unregister_key+0x2c5/0x310 kernel/locking/lockdep.c:6616
Code: 65 48 8b 05 8d b8 d0 10 48 3b 44 24 10 0f 84 26 fe ff ff e8 3d d9 a8 09 e8 68 da a8 09 41 f7 c7 00 02 00 00 74 bd fb 40 84 ed <75> bc eb cd 90 0f 0b 90 e9 19 ff ff ff 90 0f 0b 90 e9 2a ff ff ff
RSP: 0018:ffffc9000f3e7998 EFLAGS: 00000246
RAX: ccdcd281f6f07100 RBX: ffff888054d7a228 RCX: ccdcd281f6f07100
RDX: ffffffff9331e358 RSI: ffffffff8d721db6 RDI: ffffffff8bbf05e0
RBP: ffff888054d7a200 R08: 0000000000000000 R09: ffffffff81aa73f8
R10: dffffc0000000000 R11: fffffbfff1ef9aef R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000203
__qdisc_destroy+0x166/0x420 net/sched/sch_generic.c:1076
netdev_for_each_tx_queue include/linux/netdevice.h:2667 [inline]
dev_shutdown+0x93/0x440 net/sched/sch_generic.c:1487
unregister_netdevice_many_notify+0x118c/0x2390 net/core/dev.c:12360
unregister_netdevice_many net/core/dev.c:12435 [inline]
unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12249
unregister_netdevice include/linux/netdevice.h:3392 [inline]
__tun_detach+0x6d9/0x15d0 drivers/net/tun.c:621
tun_detach drivers/net/tun.c:637 [inline]
tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3436
__fput+0x44c/0xa70 fs/file_table.c:468
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82d0d8f6c9
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:00007ffe0a295278 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00000000000ae04b RCX: 00007f82d0d8f6c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f82d0fe7da0 R08: 0000000000000001 R09: 0000001a0a29556f
R10: 0000001b33a20000 R11: 0000000000000246 R12: 00007f82d0fe5fac
R13: 00007f82d0fe5fa0 R14: ffffffffffffffff R15: 00007ffe0a295390
----------------
Code disassembly (best guess):
0: 65 48 8b 05 8d b8 d0 mov %gs:0x10d0b88d(%rip),%rax # 0x10d0b895
7: 10
8: 48 3b 44 24 10 cmp 0x10(%rsp),%rax
d: 0f 84 26 fe ff ff je 0xfffffe39
13: e8 3d d9 a8 09 call 0x9a8d955
18: e8 68 da a8 09 call 0x9a8da85
1d: 41 f7 c7 00 02 00 00 test $0x200,%r15d
24: 74 bd je 0xffffffe3
26: fb sti
27: 40 84 ed test %bpl,%bpl
* 2a: 75 bc jne 0xffffffe8 <-- trapping instruction
2c: eb cd jmp 0xfffffffb
2e: 90 nop
2f: 0f 0b ud2
31: 90 nop
32: e9 19 ff ff ff jmp 0xffffff50
37: 90 nop
38: 0f 0b ud2
3a: 90 nop
3b: e9 2a ff ff ff jmp 0xffffff6a