------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff88807e6b2c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1 WARNING: CPU: 1 PID: 23 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612 Modules linked in: CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612 Code: 4c 89 ff e8 c7 d1 52 fd 4d 8b 0f 48 c7 c7 a0 41 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 aa ff b2 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 d7 79 d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 RSP: 0018:ffffc900001d7730 EFLAGS: 00010296 RAX: 6523af429327df00 RBX: dffffc0000000000 RCX: ffff88801d685a00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffffffff8a6d31c0 R13: ffffffff8be34320 R14: ffff88807e6b2c90 R15: ffffffff8b8cdfa0 FS: 0000000000000000(0000) GS:ffff888125d14000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004d9da000 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:2348 [inline] slab_free mm/slub.c:4680 [inline] kfree+0x112/0x440 mm/slub.c:4879 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+0x283/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245