[   13.826587] ==================================================================
[   13.827009] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510
[   13.827295] Read of size 1 at addr ffff888102a1f000 by task kunit_try_catch/230
[   13.828107] 
[   13.828407] CPU: 1 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6 #1 PREEMPT(voluntary) 
[   13.828481] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.828494] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.828515] Call Trace:
[   13.828527]  <TASK>
[   13.828544]  dump_stack_lvl+0x73/0xb0
[   13.828584]  print_report+0xd1/0x610
[   13.828607]  ? __virt_addr_valid+0x1db/0x2d0
[   13.828629]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.828653]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.828676]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.828700]  kasan_report+0x141/0x180
[   13.828721]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.828749]  __asan_report_load1_noabort+0x18/0x20
[   13.828820]  kmem_cache_rcu_uaf+0x3e3/0x510
[   13.828854]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   13.828888]  ? finish_task_switch.isra.0+0x153/0x700
[   13.828912]  ? __switch_to+0x47/0xf50
[   13.829180]  ? __pfx_read_tsc+0x10/0x10
[   13.829202]  ? ktime_get_ts64+0x86/0x230
[   13.829226]  kunit_try_run_case+0x1a5/0x480
[   13.829262]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.829287]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.829313]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.829337]  ? __kthread_parkme+0x82/0x180
[   13.829359]  ? preempt_count_sub+0x50/0x80
[   13.829383]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.829408]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.829433]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.829460]  kthread+0x337/0x6f0
[   13.829479]  ? trace_preempt_on+0x20/0xc0
[   13.829504]  ? __pfx_kthread+0x10/0x10
[   13.829524]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.829547]  ? calculate_sigpending+0x7b/0xa0
[   13.829585]  ? __pfx_kthread+0x10/0x10
[   13.829606]  ret_from_fork+0x116/0x1d0
[   13.829626]  ? __pfx_kthread+0x10/0x10
[   13.829647]  ret_from_fork_asm+0x1a/0x30
[   13.829677]  </TASK>
[   13.829689] 
[   13.843034] Allocated by task 230:
[   13.843177]  kasan_save_stack+0x45/0x70
[   13.843672]  kasan_save_track+0x18/0x40
[   13.844081]  kasan_save_alloc_info+0x3b/0x50
[   13.844649]  __kasan_slab_alloc+0x91/0xa0
[   13.845090]  kmem_cache_alloc_noprof+0x123/0x3f0
[   13.845754]  kmem_cache_rcu_uaf+0x155/0x510
[   13.845917]  kunit_try_run_case+0x1a5/0x480
[   13.846065]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.846296]  kthread+0x337/0x6f0
[   13.846715]  ret_from_fork+0x116/0x1d0
[   13.847114]  ret_from_fork_asm+0x1a/0x30
[   13.847538] 
[   13.847780] Freed by task 0:
[   13.848219]  kasan_save_stack+0x45/0x70
[   13.848765]  kasan_save_track+0x18/0x40
[   13.849107]  kasan_save_free_info+0x3f/0x60
[   13.849398]  __kasan_slab_free+0x56/0x70
[   13.849829]  slab_free_after_rcu_debug+0xe4/0x310
[   13.850350]  rcu_core+0x66f/0x1c40
[   13.850532]  rcu_core_si+0x12/0x20
[   13.850870]  handle_softirqs+0x209/0x730
[   13.851195]  __irq_exit_rcu+0xc9/0x110
[   13.851591]  irq_exit_rcu+0x12/0x20
[   13.851902]  sysvec_apic_timer_interrupt+0x81/0x90
[   13.852079]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   13.852322] 
[   13.852597] Last potentially related work creation:
[   13.853067]  kasan_save_stack+0x45/0x70
[   13.853636]  kasan_record_aux_stack+0xb2/0xc0
[   13.854194]  kmem_cache_free+0x131/0x420
[   13.854534]  kmem_cache_rcu_uaf+0x194/0x510
[   13.854957]  kunit_try_run_case+0x1a5/0x480
[   13.855115]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.855356]  kthread+0x337/0x6f0
[   13.855835]  ret_from_fork+0x116/0x1d0
[   13.856354]  ret_from_fork_asm+0x1a/0x30
[   13.856874] 
[   13.857092] The buggy address belongs to the object at ffff888102a1f000
[   13.857092]  which belongs to the cache test_cache of size 200
[   13.857935] The buggy address is located 0 bytes inside of
[   13.857935]  freed 200-byte region [ffff888102a1f000, ffff888102a1f0c8)
[   13.858535] 
[   13.858727] The buggy address belongs to the physical page:
[   13.859457] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a1f
[   13.860192] flags: 0x200000000000000(node=0|zone=2)
[   13.860808] page_type: f5(slab)
[   13.861075] raw: 0200000000000000 ffff8881025d5140 dead000000000122 0000000000000000
[   13.861723] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   13.862150] page dumped because: kasan: bad access detected
[   13.862344] 
[   13.862418] Memory state around the buggy address:
[   13.862588]  ffff888102a1ef00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   13.862913]  ffff888102a1ef80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   13.863241] >ffff888102a1f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   13.863594]                    ^
[   13.863752]  ffff888102a1f080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   13.864139]  ffff888102a1f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.864566] ==================================================================