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ODEBUG: free active (active state 0) object: ffff88803c156c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560
WARNING: lib/debugobjects.c:615 at debug_check_no_obj_freed+0x405/0x550, CPU#1: swapper/1/0
Modules linked in:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 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 37 6f 77 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 b0 27 8c 48 c7 c2 c0 b5 27 8c 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:ffffc90000a08b68 EFLAGS: 00010246
RAX: ffffffff8a955d90 RBX: ffffffff9a4abca0 RCX: 0000000000000000
RDX: ffffffff8c27b5c0 RSI: ffffffff8c27b040 RDI: ffffffff901c4580
RBP: ffffffff8bcf3c40 R08: ffff88803c156c90 R09: ffffffff8bcf4f60
R10: dffffc0000000000 R11: ffffffff81b1d860 R12: ffff88803c156e00
R13: ffffffff901c4580 R14: ffff88803c156000 R15: ffff88803c156c90
FS:  0000000000000000(0000) GS:ffff8882a9464000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a2fc4eaeb CR3: 000000000e54c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 kfree+0x13a/0x630
 rose_timer_expiry+0x4cb/0x600
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __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: 6e 6d 02 c3 cc cc cc cc 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 43 0d 1c 00 fb f4 <e9> 7c ea 02 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 00000202
RAX: 0000000000b37b6d RBX: ffffffff819a80dd RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8def2dd5 RDI: ffffffff8c27aa00
RBP: ffffc90000197f10 R08: ffff88823c63395b R09: 1ffff110478c672b
R10: dffffc0000000000 R11: ffffed10478c672c R12: ffffffff901186b0
R13: 1ffff1102c095000 R14: 0000000000000001 R15: 0000000000000001
 default_idle+0x9/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x1bd/0x500
 cpu_startup_entry+0x43/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x147
 </TASK>
