------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff8880554e1090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1 WARNING: CPU: 0 PID: 30763 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612 Modules linked in: CPU: 0 UID: 0 PID: 30763 Comm: syz.0.6017 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 67 e4 92 fd 4d 8b 0f 48 c7 c7 00 11 bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 1a 49 f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 17 3e ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 RSP: 0000:ffffc9000dcff940 EFLAGS: 00010292 RAX: 1f5ba64c4020b800 RBX: dffffc0000000000 RCX: ffff888025653c80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bba680 R12: ffffffff8a395360 R13: ffffffff8bbf1280 R14: ffff8880554e1090 R15: ffffffff8b6cf7a0 FS: 00005555679e6500(0000) GS:ffff88812613b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30e0dff8 CR3: 000000006b410000 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+0x57/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0033:0x7f755866eee4 Code: 82 b5 03 00 00 c6 44 24 1e 01 45 31 ff 45 31 f6 44 0f b6 e6 85 c0 0f 84 9e 00 00 00 44 89 f9 49 8b 50 40 4c 89 f0 49 03 14 ca <80> 3d bd 8e 37 00 00 49 89 d6 48 89 d5 74 28 25 ff 0f 00 00 83 f0 RSP: 002b:00007ffd30e5f200 EFLAGS: 00000282 RAX: ffffffff81c272ff RBX: 00007f7559515720 RCX: 00000000000343ff RDX: ffffffff81c274d5 RSI: ffffffff81c27360 RDI: 0000000000000009 RBP: ffffffff81c27360 R08: 00007f75589e6128 R09: 00007f75589d2000 R10: 00007f7557dfd008 R11: 0000000000000009 R12: 0000000000000009 R13: 0000000000001775 R14: ffffffff81c272ff R15: 00000000000343ff