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ODEBUG: free active (active state 0) object: ffff888042046490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 28039 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 28039 Comm: syz.3.6447 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 2c ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000007a00 EFLAGS: 00010296
RAX: a6776906a9dd7d00 RBX: dffffc0000000000 RCX: ffff888029708000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba650 R12: ffffffff8a391560
R13: ffffffff8bbf1100 R14: ffff888042046490 R15: ffffffff8b6cf600
FS: 00007f735fa3b6c0(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c310313 CR3: 000000004380e000 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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:114 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:128 [inline]
RIP: 0010:lock_is_held_type+0x6c/0x190 kernel/locking/lockdep.c:5936
Code: 8b 2c 25 08 20 6e 92 41 83 bd 2c 0b 00 00 00 0f 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 48 c7 c7 0e 1b 72 8d e8 07 17 00 00 65 ff 05 10 1b 28 07 41 83
RSP: 0018:ffffc9001bff7558 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: a6776906a9dd7d00
RDX: 0000000000000003 RSI: 00000000ffffffff RDI: ffff88801c6a8188
RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff82606e8c
R10: dffffc0000000000 R11: ffffed10038d5025 R12: 0000000000000246
R13: ffff888029708000 R14: ffff88801c6a8188 R15: ffff88804e4324c0
lock_is_held include/linux/lockdep.h:249 [inline]
kernfs_root_is_locked fs/kernfs/kernfs-internal.h:109 [inline]
kernfs_rcu_name fs/kernfs/kernfs-internal.h:119 [inline]
kernfs_sd_compare fs/kernfs/dir.c:349 [inline]
kernfs_link_sibling+0xf7/0x3e0 fs/kernfs/dir.c:380
kernfs_add_one+0x1e0/0x520 fs/kernfs/dir.c:810
kernfs_create_dir_ns+0xde/0x130 fs/kernfs/dir.c:1093
sysfs_create_dir_ns+0x123/0x280 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x59f/0xb40 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_add+0x155/0x220 lib/kobject.c:426
device_add+0x408/0xb50 drivers/base/core.c:3627
netdev_register_kobject+0x178/0x310 net/core/net-sysfs.c:2358
register_netdevice+0x126c/0x1ae0 net/core/dev.c:11344
register_netdev+0x40/0x60 net/core/dev.c:11460
ip6_tnl_init_net+0x259/0x3b0 net/ipv6/ip6_tunnel.c:2307
ops_init+0x35c/0x5c0 net/core/net_namespace.c:137
setup_net+0xfe/0x320 net/core/net_namespace.c:446
copy_net_ns+0x34e/0x4e0 net/core/net_namespace.c:581
create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x11c/0x170 kernel/nsproxy.c:218
ksys_unshare+0x4c8/0x8c0 kernel/fork.c:3129
__do_sys_unshare kernel/fork.c:3200 [inline]
__se_sys_unshare kernel/fork.c:3198 [inline]
__x64_sys_unshare+0x38/0x50 kernel/fork.c:3198
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f735eb8efc9
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:00007f735fa3b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f735ede5fa0 RCX: 00007f735eb8efc9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007f735ec11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f735ede6038 R14: 00007f735ede5fa0 R15: 00007ffff223fda8
----------------
Code disassembly (best guess):
0: 8b 2c 25 08 20 6e 92 mov 0xffffffff926e2008,%ebp
7: 41 83 bd 2c 0b 00 00 cmpl $0x0,0xb2c(%r13)
e: 00
f: 0f 85 d8 00 00 00 jne 0xed
15: 89 f5 mov %esi,%ebp
17: 49 89 fe mov %rdi,%r14
1a: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
21: 00
22: 9c pushf
23: 8f 04 24 pop (%rsp)
26: 4c 8b 24 24 mov (%rsp),%r12
* 2a: fa cli <-- trapping instruction
2b: 48 c7 c7 0e 1b 72 8d mov $0xffffffff8d721b0e,%rdi
32: e8 07 17 00 00 call 0x173e
37: 65 ff 05 10 1b 28 07 incl %gs:0x7281b10(%rip) # 0x7281b4e
3e: 41 rex.B
3f: 83 .byte 0x83