------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880563dec90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:615 at debug_print_object lib/debugobjects.c:612 [inline], CPU#0: syz-executor/5830
WARNING: lib/debugobjects.c:615 at __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline], CPU#0: syz-executor/5830
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1129, CPU#0: syz-executor/5830
Modules linked in:
CPU: 0 UID: 0 PID: 5830 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:debug_print_object lib/debugobjects.c:612 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1129
Code: 89 44 24 20 e8 87 04 8f fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 a0 89 c0 8b 48 c7 c2 c0 8e c0 8b 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:ffffc90000007a70 EFLAGS: 00010246
RAX: ffffffff8a4c8560 RBX: ffffffff99b3edc8 RCX: 0000000000000000
RDX: ffffffff8bc08ec0 RSI: ffffffff8bc089a0 RDI: ffffffff8f8c80f0
RBP: ffffffff8b6d2440 R08: ffff8880563dec90 R09: ffffffff8b6d35a0
R10: dffffc0000000000 R11: ffffffff81aeb860 R12: ffff8880563dee00
R13: ffffffff8f8c80f0 R14: ffff8880563de000 R15: ffff8880563dec90
FS: 000055555903b500(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5874f156c0 CR3: 0000000075b9c000 CR4: 00000000003526f0
Call Trace:
slab_free_hook mm/slub.c:2471 [inline]
slab_free mm/slub.c:6668 [inline]
kfree+0x13b/0x660 mm/slub.c:6876
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2373 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
run_timer_base kernel/time/timer.c:2394 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
handle_softirqs+0x27d/0x850 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:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x2a6/0x3b0 kernel/locking/lockdep.c:5893
Code: 4d 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 52 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 ba 06 e0 10 <48> 3b 44 24 28 75 75 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3
RSP: 0018:ffffc90003fff2e8 EFLAGS: 00000206
RAX: 354709d35c58da00 RBX: 0000000000000206 RCX: 354709d35c58da00
RDX: 0000000000000007 RSI: ffffffff8d979277 RDI: ffffffff8bc08360
RBP: ffff88802cec8c48 R08: ffffffff8233b88a R09: ffffffff8df41ae0
R10: dffffc0000000000 R11: fffff9400032ed29 R12: 0000000000000007
R13: 0000000000000007 R14: ffffffff8df41ae0 R15: ffff88802cec8000
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:979 [inline]
pfn_valid+0x3b2/0x490 include/linux/mmzone.h:2193
page_table_check_set+0x25/0x610 mm/page_table_check.c:105
page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
set_ptes include/linux/pgtable.h:292 [inline]
__copy_present_ptes mm/memory.c:1102 [inline]
copy_present_ptes mm/memory.c:1181 [inline]
copy_pte_range mm/memory.c:1304 [inline]
copy_pmd_range+0x4d02/0x7e00 mm/memory.c:1392
copy_pud_range mm/memory.c:1429 [inline]
copy_p4d_range mm/memory.c:1453 [inline]
copy_page_range+0xb88/0x11d0 mm/memory.c:1535
dup_mmap+0xf4a/0x1b80 mm/mmap.c:1827
dup_mm kernel/fork.c:1529 [inline]
copy_mm+0x13c/0x4b0 kernel/fork.c:1581
copy_process+0x165d/0x3950 kernel/fork.c:2221
kernel_clone+0x21e/0x820 kernel/fork.c:2651
__do_sys_clone kernel/fork.c:2792 [inline]
__se_sys_clone kernel/fork.c:2776 [inline]
__x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2776
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5874185e93
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffe225eef28 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5874185e93
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055555903b7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 00000000000526b9 R15: 00007ffe225ef0c0
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 87 04 8f fd call 0xfd8f0490
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 a0 89 c0 8b mov $0xffffffff8bc089a0,%rsi
1c: 48 c7 c2 c0 8e c0 8b mov $0xffffffff8bc08ec0,%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