------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff8880576d3090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880 WARNING: CPU: 2 PID: 15434 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Modules linked in: CPU: 2 UID: 0 PID: 15434 Comm: syz.0.2909 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 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 20 1c d0 8b 4c 89 e6 48 c7 c7 a0 10 d0 8b e8 6f d5 d2 fc 90 <0f> 0b 90 90 58 83 05 a6 02 ba 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0000:ffffc900039b7968 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff8179b5b8 RDX: ffff888021790000 RSI: ffffffff8179b5c5 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8bd01740 R13: ffffffff8b6ff940 R14: ffffffff8a3f4b30 R15: ffffc900039b7a68 FS: 0000555559644500(0000) GS:ffff8880d7055000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f668df95e9c CR3: 0000000052a23000 CR4: 0000000000352ef0 DR0: 0000000000000400 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 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:2353 [inline] slab_free mm/slub.c:4695 [inline] kfree+0x28f/0x4d0 mm/slub.c:4894 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+0x216/0x8e0 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:702 RIP: 0033:0x7f2e2384eae4 Code: 41 5e 41 5f c3 90 48 83 ec 18 89 fe 31 c0 bf e7 00 00 00 e8 de 03 14 00 c7 44 24 0c 00 00 00 00 66 0f 1f 44 00 00 8b 44 24 0c <83> c0 01 89 44 24 0c eb f3 0f 1f 00 55 53 48 89 fb 48 81 ec d8 00 RSP: 002b:00007ffd629cb1b0 EFLAGS: 00000202 RAX: 000000003cbb3f16 RBX: 0000000000000000 RCX: 00007f2e2398eec9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffd629cb20c R08: 0000000b629cb29f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000002d1 R13: 00000000000927c0 R14: 00000000000468c5 R15: 00007ffd629cb260