------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff888059a64890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927 WARNING: CPU: 0 PID: 24223 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Modules linked in: CPU: 0 UID: 0 PID: 24223 Comm: syz.0.4738 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+0x1a2/0x2b0 lib/debugobjects.c:612 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd a0 f4 f1 8b 4c 89 e6 48 c7 c7 20 e9 f1 8b e8 0f df c7 fc 90 <0f> 0b 90 90 58 83 05 16 d0 cf 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0000:ffffc9000f5df958 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b6ee8 RDX: ffff88803549a480 RSI: ffffffff817b6ef5 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: fffffffffffd2af8 R12: ffffffff8bf1efc0 R13: ffffffff8b901fe0 R14: ffffffff8a533e10 R15: ffffc9000f5dfa58 FS: 000055557f7f2500(0000) GS:ffff8881249d9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c41e58c CR3: 00000000418d4000 CR4: 00000000003526f0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline] debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2454 [inline] slab_free mm/slub.c:6611 [inline] kfree+0x291/0x6d0 mm/slub.c:6818 rose_neigh_put include/net/rose.h:166 [inline] rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183 call_timer_fn+0x19a/0x620 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers+0x6ef/0x960 kernel/time/timer.c:2372 __run_timer_base kernel/time/timer.c:2384 [inline] __run_timer_base kernel/time/timer.c:2376 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2393 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x109/0x170 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: 0033:0x7fde190681a6 Code: 77 f8 48 89 f8 48 89 eb eb 12 66 2e 0f 1f 84 00 00 00 00 00 48 8b 4b 08 48 83 c3 08 48 39 d1 72 f3 48 83 e8 08 48 39 f2 73 17 <66> 2e 0f 1f 84 00 00 00 00 00 48 8b 70 f8 48 83 e8 08 48 39 f2 72 RSP: 002b:00007fff8d71a890 EFLAGS: 00000283 RAX: 00007fde18467078 RBX: 00007fde18466f98 RCX: ffffffff85e35f0d RDX: ffffffff85e32432 RSI: ffffffff85e377e0 RDI: 00007fde184671d0 RBP: 00007fde18466ea0 R08: 00007fde18467030 R09: 00007fde193d2000 R10: 00007fde183fb008 R11: 0000000000000016 R12: 00007fde18466e98 R13: 0000000000000012 R14: 00007fff8d71ab08 R15: 00007fde183fb008