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ODEBUG: free active (active state 0) object: ffff888032d3e090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550, CPU#0: swapper/0/0
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550
Code: 89 44 24 20 e8 a7 29 87 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 3f e7 8b 48 c7 c2 c0 44 e7 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:ffffc90000007b70 EFLAGS: 00010246
RAX: ffffffff8a6651c0 RBX: ffffffff99fd4e20 RCX: 0000000000000000
RDX: ffffffff8be744c0 RSI: ffffffff8be73f40 RDI: ffffffff8fd98540
RBP: ffffffff8b8f3dc0 R08: ffff888032d3e090 R09: ffffffff8b8f50e0
R10: dffffc0000000000 R11: ffffffff81af5860 R12: ffff888032d3e200
R13: ffffffff8fd98540 R14: ffff888032d3e000 R15: ffff888032d3e090
FS:  0000000000000000(0000) GS:ffff88818e31a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000d000 CR3: 0000000022668000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 kfree+0x139/0x650
 rose_timer_expiry+0x4cb/0x600
 call_timer_fn+0x192/0x5a0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x7c0
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0xf/0x20
Code: 38 5e 02 e9 d3 e5 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 53 39 0f 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8e007dc0 EFLAGS: 00000206
RAX: 000000000035fdc5 RBX: ffffffff8198227d RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8dad953d RDI: ffffffff8be73900
RBP: ffffffff8e007eb0 R08: ffff8881210336db R09: 1ffff110242066db
R10: dffffc0000000000 R11: ffffed10242066dc R12: ffffffff8fcf2170
R13: 1ffffffff1c12a78 R14: 0000000000000000 R15: 0000000000000000
 default_idle+0x9/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x1bd/0x500
 cpu_startup_entry+0x43/0x60
 rest_init+0x2de/0x300
 start_kernel+0x380/0x3d0
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x143/0x1c0
 common_startup_64+0x13e/0x147
 </TASK>
