[   12.557804] ==================================================================
[   12.558585] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480
[   12.559132] Free of addr ffff8881029e3000 by task kunit_try_catch/229
[   12.559556] 
[   12.559755] CPU: 1 UID: 0 PID: 229 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc2 #1 PREEMPT(voluntary) 
[   12.559842] Tainted: [B]=BAD_PAGE, [N]=TEST
[   12.559860] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   12.559896] Call Trace:
[   12.559919]  <TASK>
[   12.559951]  dump_stack_lvl+0x73/0xb0
[   12.560002]  print_report+0xd1/0x650
[   12.560045]  ? __virt_addr_valid+0x1db/0x2d0
[   12.560087]  ? kasan_complete_mode_report_info+0x64/0x200
[   12.560127]  ? kmem_cache_double_free+0x1e5/0x480
[   12.560165]  kasan_report_invalid_free+0x10a/0x130
[   12.560205]  ? kmem_cache_double_free+0x1e5/0x480
[   12.560238]  ? kmem_cache_double_free+0x1e5/0x480
[   12.560268]  check_slab_allocation+0x101/0x130
[   12.560301]  __kasan_slab_pre_free+0x28/0x40
[   12.560332]  kmem_cache_free+0xed/0x420
[   12.560366]  ? kmem_cache_alloc_noprof+0x123/0x3f0
[   12.560399]  ? kmem_cache_double_free+0x1e5/0x480
[   12.560435]  kmem_cache_double_free+0x1e5/0x480
[   12.560469]  ? __pfx_kmem_cache_double_free+0x10/0x10
[   12.560507]  ? sysvec_apic_timer_interrupt+0x50/0x90
[   12.560562]  ? __pfx_kmem_cache_double_free+0x10/0x10
[   12.560612]  kunit_try_run_case+0x1a5/0x480
[   12.560795]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.560840]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   12.560880]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   12.560914]  ? __kthread_parkme+0x82/0x180
[   12.560949]  ? preempt_count_sub+0x50/0x80
[   12.560993]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.561038]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.561082]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   12.561127]  kthread+0x337/0x6f0
[   12.561153]  ? trace_preempt_on+0x20/0xc0
[   12.561178]  ? __pfx_kthread+0x10/0x10
[   12.561195]  ? _raw_spin_unlock_irq+0x47/0x80
[   12.561215]  ? calculate_sigpending+0x7b/0xa0
[   12.561236]  ? __pfx_kthread+0x10/0x10
[   12.561254]  ret_from_fork+0x41/0x80
[   12.561274]  ? __pfx_kthread+0x10/0x10
[   12.561326]  ret_from_fork_asm+0x1a/0x30
[   12.561385]  </TASK>
[   12.561400] 
[   12.572137] Allocated by task 229:
[   12.572381]  kasan_save_stack+0x45/0x70
[   12.572865]  kasan_save_track+0x18/0x40
[   12.573181]  kasan_save_alloc_info+0x3b/0x50
[   12.573664]  __kasan_slab_alloc+0x91/0xa0
[   12.573927]  kmem_cache_alloc_noprof+0x123/0x3f0
[   12.574259]  kmem_cache_double_free+0x14f/0x480
[   12.574683]  kunit_try_run_case+0x1a5/0x480
[   12.574875]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.575073]  kthread+0x337/0x6f0
[   12.575400]  ret_from_fork+0x41/0x80
[   12.575721]  ret_from_fork_asm+0x1a/0x30
[   12.576023] 
[   12.576176] Freed by task 229:
[   12.577235]  kasan_save_stack+0x45/0x70
[   12.577765]  kasan_save_track+0x18/0x40
[   12.578095]  kasan_save_free_info+0x3f/0x60
[   12.578506]  __kasan_slab_free+0x56/0x70
[   12.578854]  kmem_cache_free+0x249/0x420
[   12.579076]  kmem_cache_double_free+0x16a/0x480
[   12.579516]  kunit_try_run_case+0x1a5/0x480
[   12.579806]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.580054]  kthread+0x337/0x6f0
[   12.580209]  ret_from_fork+0x41/0x80
[   12.580639]  ret_from_fork_asm+0x1a/0x30
[   12.580947] 
[   12.581090] The buggy address belongs to the object at ffff8881029e3000
[   12.581090]  which belongs to the cache test_cache of size 200
[   12.581687] The buggy address is located 0 bytes inside of
[   12.581687]  200-byte region [ffff8881029e3000, ffff8881029e30c8)
[   12.582095] 
[   12.582206] The buggy address belongs to the physical page:
[   12.582532] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029e3
[   12.583047] flags: 0x200000000000000(node=0|zone=2)
[   12.583391] page_type: f5(slab)
[   12.584566] raw: 0200000000000000 ffff888101ab5280 dead000000000122 0000000000000000
[   12.584912] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   12.585501] page dumped because: kasan: bad access detected
[   12.585832] 
[   12.585979] Memory state around the buggy address:
[   12.586238]  ffff8881029e2f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.586867]  ffff8881029e2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.587216] >ffff8881029e3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.587798]                    ^
[   12.587968]  ffff8881029e3080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   12.588960]  ffff8881029e3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.589472] ==================================================================