------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888020de4490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 5156 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 5156 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 5156 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 5156 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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 80 7a fc 8a 48 c7 c6 e0 76 fc 8a 48 c7 c2 00 7c fc 8a 8b 0c 24 4d 89 f8 41 55 e8 be 2e 2a fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 b3 e8 24
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: e041870a7a4f7600 RBX: ffffffff97177750 RCX: ffff88807d89bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9e00 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff888020de4600
R13: ffffffff8966e8e0 R14: ffff888020de4000 R15: ffff888020de4490
FS: 00007f893321d880(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556909c5c8 CR3: 00000000192d3000 CR4: 00000000003506e0
Call Trace:
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1832
slab_free mm/slub.c:3816 [inline]
__kmem_cache_free+0xba/0x1f0 mm/slub.c:3829
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:d_really_is_negative include/linux/dcache.h:466 [inline]
RIP: 0010:kernfs_dentry_node fs/kernfs/kernfs-internal.h:102 [inline]
RIP: 0010:kernfs_dop_revalidate+0x2f0/0x570 fs/kernfs/dir.c:1166
Code: bd 00 00 00 00 00 fc ff df 80 3c 28 00 74 08 4c 89 ef e8 b3 da ca ff 4d 8b 6d 00 49 83 c5 68 4c 89 e8 48 c1 e8 03 80 3c 28 00 <74> 08 4c 89 ef e8 96 da ca ff 4d 8b 6d 00 4d 85 ed 74 53 e8 38 94
RSP: 0018:ffffc900032477f0 EFLAGS: 00000246
RAX: 1ffff1100f30a556 RBX: ffff8880211897f0 RCX: 0000000000000000
RDX: ffff88807d89bc00 RSI: 0000000000000000 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: ffff8880211897c7 R09: 1ffff110042312f8
R10: dffffc0000000000 R11: ffffed10042312f9 R12: 1ffff110042312fe
R13: ffff888079852ab0 R14: ffff888021c5a8d0 R15: ffff8880211897c0
d_revalidate fs/namei.c:862 [inline]
lookup_fast+0x1f6/0x4d0 fs/namei.c:-1
walk_component fs/namei.c:1998 [inline]
link_path_walk+0x5ff/0xe00 fs/namei.c:2329
path_openat+0x283/0x3190 fs/namei.c:3785
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
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: 0033:0x7f8933315c3a
Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24
RSP: 002b:00007ffce3fc66d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055ed5f6387a0 RCX: 00007f8933315c3a
RDX: 0000000000090800 RSI: 000055ed5f6298e0 RDI: 00000000ffffff9c
RBP: 000055ed5f6298e0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000206 R12: 000055ed5f6227b0
R13: 00000000000000ff R14: 000055ed3b1f7be0 R15: 00007ffce3fc6960
----------------
Code disassembly (best guess):
0: bd 00 00 00 00 mov $0x0,%ebp
5: 00 fc add %bh,%ah
7: ff (bad)
8: df 80 3c 28 00 74 filds 0x7400283c(%rax)
e: 08 4c 89 ef or %cl,-0x11(%rcx,%rcx,4)
12: e8 b3 da ca ff call 0xffcadaca
17: 4d 8b 6d 00 mov 0x0(%r13),%r13
1b: 49 83 c5 68 add $0x68,%r13
1f: 4c 89 e8 mov %r13,%rax
22: 48 c1 e8 03 shr $0x3,%rax
26: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 4c 89 ef mov %r13,%rdi
2f: e8 96 da ca ff call 0xffcadaca
34: 4d 8b 6d 00 mov 0x0(%r13),%r13
38: 4d 85 ed test %r13,%r13
3b: 74 53 je 0x90
3d: e8 .byte 0xe8
3e: 38 .byte 0x38
3f: 94 xchg %eax,%esp