------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880591b1490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#0: modprobe/13463
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#0: modprobe/13463
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#0: modprobe/13463
Modules linked in:
CPU: 0 UID: 0 PID: 13463 Comm: modprobe Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1146
Code: 89 44 24 20 e8 47 54 77 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 f6 27 8c 48 c7 c2 c0 fb 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:ffffc90000007b48 EFLAGS: 00010246
RAX: ffffffff8a996a90 RBX: ffffffff9a707f88 RCX: 0000000000000000
RDX: ffffffff8c27fbc0 RSI: ffffffff8c27f640 RDI: ffffffff903ce070
RBP: ffffffff8bcf42a0 R08: ffff8880591b1490 R09: ffffffff8bcf5600
R10: dffffc0000000000 R11: ffffffff81b1dac0 R12: ffff8880591b1600
R13: ffffffff903ce070 R14: ffff8880591b1000 R15: ffff8880591b1490
FS: 0000000000000000(0000) GS:ffff888125245000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc1dcc3c6c CR3: 0000000059ece000 CR4: 00000000003526f0
Call Trace:
slab_free_hook mm/slub.c:2616 [inline]
slab_free mm/slub.c:6165 [inline]
kfree+0x13a/0x620 mm/slub.c:6483
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2374 [inline]
__run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
run_timer_base kernel/time/timer.c:2395 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x15/0x2550 arch/x86/kernel/unwind_orc.c:485
Code: 00 eb 88 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 <49> 89 fe 48 bd 00 00 00 00 00 fc ff df 48 8d 5f 48 48 89 d8 48 c1
RSP: 0018:ffffc9000f96f838 EFLAGS: 00000292
RAX: 0000000000000001 RBX: ffffc9000f96f9c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff81000130 RDI: ffffc9000f96f908
RBP: ffffc9000f96f990 R08: ffffc9000f96f9d0 R09: 0000000000000007
R10: ffffc9000f96f958 R11: ffffffff81b0a9b0 R12: ffff888053333d80
R13: 0000000000000000 R14: ffffffff81b0a9b0 R15: ffffc9000f96f908
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2685 [inline]
slab_free mm/slub.c:6165 [inline]
kmem_cache_free+0x180/0x630 mm/slub.c:6295
class_filename_destructor include/linux/fs.h:2552 [inline]
class_filename_maybe_null_destructor include/linux/fs.h:2556 [inline]
vfs_fstatat+0x13d/0x170 fs/stat.c:375
__do_sys_newfstatat fs/stat.c:538 [inline]
__se_sys_newfstatat fs/stat.c:532 [inline]
__x64_sys_newfstatat+0x151/0x200 fs/stat.c:532
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f454636aeaa
Code: b8 05 00 00 00 0f 05 48 3d 00 f0 ff ff 77 01 c3 f7 d8 89 05 08 44 01 00 b8 ff ff ff ff c3 66 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 f7 d8 89 05 e0 43 01 00
RSP: 002b:00007ffc1dcc3ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffc1dcc3ac7 RCX: 00007f454636aeaa
RDX: 00007ffc1dcc3b70 RSI: 00007ffc1dcc3ac0 RDI: 00000000ffffff9c
RBP: 00007ffc1dcc3c30 R08: 00007ffc1dcc3cb7 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000001e
R13: 00007f454633f000 R14: 0000000000000001 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 47 54 77 fd call 0xfd775450
9: 48 8b 44 24 20 mov 0x20(%rsp),%rax
e: 4c 8b 4d 00 mov 0x0(%rbp),%r9
12: 4c 89 ef mov %r13,%rdi
15: 48 c7 c6 40 f6 27 8c mov $0xffffffff8c27f640,%rsi
1c: 48 c7 c2 c0 fb 27 8c mov $0xffffffff8c27fbc0,%rdx
23: 8b 0c 24 mov (%rsp),%ecx
26: 4d 89 f8 mov %r15,%r8
29: 50 push %rax
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: 4c 8b 6c 24 18 mov 0x18(%rsp),%r13
38: 48 rex.W
39: b9 00 00 00 00 mov $0x0,%ecx
3e: 00 fc add %bh,%ah