------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88801e3d7890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 13528 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 13528 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 13528 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 13528 Comm: syz.1.2004 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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 60 93 1c 8b 48 c7 c6 c0 8f 1c 8b 48 c7 c2 e0 94 1c 8b 8b 0c 24 4d 89 f8 41 55 e8 8e 91 1f 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 f0 59
RSP: 0000:ffffc900001f0a50 EFLAGS: 00010296
RAX: fd56626d745c9300 RBX: ffffffff9749c9e8 RCX: ffff88802f2a8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8accac00 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff88801e3d7a00
R13: ffffffff897ac5a0 R14: ffff88801e3d7000 R15: ffff88801e3d7890
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa045c085a8 CR3: 000000000cf32000 CR4: 00000000003506e0
Call Trace:
slab_free_hook mm/slub.c:1786 [inline]
slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1e0 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+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
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+0xd3/0x190 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:orc_find arch/x86/kernel/unwind_orc.c:217 [inline]
RIP: 0010:unwind_next_frame+0x240/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 00 44 39 fd 0f 86 4f 1d 00 00 44 89 f8 4c 8d 2c 85 48 4e b2 8f 4c 89 e8 48 c1 e8 03 48 bb 00 00 00 00 00 fc ff df 0f b6 04 18 <84> c0 0f 85 de 21 00 00 45 8b 6d 00 44 89 f8 ff c0 48 8d 2c 85 48
RSP: 0000:ffffc9000da1edd8 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88802f2a8000 RSI: 00000000000075c0 RDI: 000000000009c000
RBP: 000000000009c000 R08: ffffc9000da1ef70 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000000 R12: ffffc9000da1eea8
R13: ffffffff8fb42548 R14: ffffc9000da1eedd R15: 00000000000075c0
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
save_stack+0x125/0x230 mm/page_owner.c:128
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2504
release_pages+0x1f7a/0x2200 mm/swap.c:1022
__folio_batch_release+0x71/0xe0 mm/swap.c:1042
folio_batch_release include/linux/pagevec.h:83 [inline]
shmem_undo_range+0x630/0x1b20 mm/shmem.c:1026
shmem_truncate_range mm/shmem.c:1135 [inline]
shmem_evict_inode+0x245/0x9e0 mm/shmem.c:1264
evict+0x4ca/0x8d0 fs/inode.c:705
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfe/0x1e0 fs/dcache.c:918
__fput+0x5e5/0x970 fs/file_table.c:392
task_work_run+0x1d4/0x260 kernel/task_work.c:245
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x95a/0x2460 kernel/exit.c:883
do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
get_signal+0x12fc/0x13f0 kernel/signal.c:2902
arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/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+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f633c19c819
Code: Unable to access opcode bytes at 0x7f633c19c7ef.
RSP: 002b:00007f633d0b6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: fffffffffffffe00 RBX: 00007f633c415fa0 RCX: 00007f633c19c819
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f633c232c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f633c416038 R14: 00007f633c415fa0 R15: 00007fffe7fefe68
----------------
Code disassembly (best guess):
0: 00 44 39 fd add %al,-0x3(%rcx,%rdi,1)
4: 0f 86 4f 1d 00 00 jbe 0x1d59
a: 44 89 f8 mov %r15d,%eax
d: 4c 8d 2c 85 48 4e b2 lea -0x704db1b8(,%rax,4),%r13
14: 8f
15: 4c 89 e8 mov %r13,%rax
18: 48 c1 e8 03 shr $0x3,%rax
1c: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx
23: fc ff df
26: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 de 21 00 00 jne 0x2210
32: 45 8b 6d 00 mov 0x0(%r13),%r13d
36: 44 89 f8 mov %r15d,%eax
39: ff c0 inc %eax
3b: 48 rex.W
3c: 8d .byte 0x8d
3d: 2c 85 sub $0x85,%al
3f: 48 rex.W