[   13.156320] ==================================================================
[   13.156799] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510
[   13.157246] Read of size 1 at addr ffff888102a0e000 by task kunit_try_catch/230
[   13.157520] 
[   13.157636] CPU: 1 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   13.157682] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.157693] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.157714] Call Trace:
[   13.157728]  <TASK>
[   13.157747]  dump_stack_lvl+0x73/0xb0
[   13.157779]  print_report+0xd1/0x650
[   13.157802]  ? __virt_addr_valid+0x1db/0x2d0
[   13.157852]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.157875]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.157898]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.157931]  kasan_report+0x141/0x180
[   13.157953]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.157981]  __asan_report_load1_noabort+0x18/0x20
[   13.158006]  kmem_cache_rcu_uaf+0x3e3/0x510
[   13.158030]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   13.158052]  ? finish_task_switch.isra.0+0x153/0x700
[   13.158076]  ? __switch_to+0x47/0xf50
[   13.158123]  ? __pfx_read_tsc+0x10/0x10
[   13.158144]  ? ktime_get_ts64+0x86/0x230
[   13.158169]  kunit_try_run_case+0x1a5/0x480
[   13.158195]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.158217]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.158242]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.158265]  ? __kthread_parkme+0x82/0x180
[   13.158286]  ? preempt_count_sub+0x50/0x80
[   13.158309]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.158333]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.158357]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.158382]  kthread+0x337/0x6f0
[   13.158400]  ? trace_preempt_on+0x20/0xc0
[   13.158424]  ? __pfx_kthread+0x10/0x10
[   13.158445]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.158466]  ? calculate_sigpending+0x7b/0xa0
[   13.158490]  ? __pfx_kthread+0x10/0x10
[   13.158515]  ret_from_fork+0x116/0x1d0
[   13.158533]  ? __pfx_kthread+0x10/0x10
[   13.158553]  ret_from_fork_asm+0x1a/0x30
[   13.158586]  </TASK>
[   13.158595] 
[   13.168587] Allocated by task 230:
[   13.168759]  kasan_save_stack+0x45/0x70
[   13.168962]  kasan_save_track+0x18/0x40
[   13.169142]  kasan_save_alloc_info+0x3b/0x50
[   13.169339]  __kasan_slab_alloc+0x91/0xa0
[   13.169525]  kmem_cache_alloc_noprof+0x123/0x3f0
[   13.169729]  kmem_cache_rcu_uaf+0x155/0x510
[   13.170740]  kunit_try_run_case+0x1a5/0x480
[   13.171221]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.171529]  kthread+0x337/0x6f0
[   13.171949]  ret_from_fork+0x116/0x1d0
[   13.172239]  ret_from_fork_asm+0x1a/0x30
[   13.172436] 
[   13.172528] Freed by task 0:
[   13.172665]  kasan_save_stack+0x45/0x70
[   13.173198]  kasan_save_track+0x18/0x40
[   13.173482]  kasan_save_free_info+0x3f/0x60
[   13.173792]  __kasan_slab_free+0x56/0x70
[   13.174219]  slab_free_after_rcu_debug+0xe4/0x310
[   13.174446]  rcu_core+0x66f/0x1c40
[   13.174621]  rcu_core_si+0x12/0x20
[   13.175276]  handle_softirqs+0x209/0x730
[   13.175555]  __irq_exit_rcu+0xc9/0x110
[   13.175915]  irq_exit_rcu+0x12/0x20
[   13.176383]  sysvec_apic_timer_interrupt+0x81/0x90
[   13.176679]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   13.177133] 
[   13.177232] Last potentially related work creation:
[   13.177440]  kasan_save_stack+0x45/0x70
[   13.177623]  kasan_record_aux_stack+0xb2/0xc0
[   13.178421]  kmem_cache_free+0x131/0x420
[   13.178705]  kmem_cache_rcu_uaf+0x194/0x510
[   13.179239]  kunit_try_run_case+0x1a5/0x480
[   13.179452]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.179698]  kthread+0x337/0x6f0
[   13.180135]  ret_from_fork+0x116/0x1d0
[   13.180458]  ret_from_fork_asm+0x1a/0x30
[   13.180908] 
[   13.181026] The buggy address belongs to the object at ffff888102a0e000
[   13.181026]  which belongs to the cache test_cache of size 200
[   13.181777] The buggy address is located 0 bytes inside of
[   13.181777]  freed 200-byte region [ffff888102a0e000, ffff888102a0e0c8)
[   13.182551] 
[   13.182790] The buggy address belongs to the physical page:
[   13.183197] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a0e
[   13.183784] flags: 0x200000000000000(node=0|zone=2)
[   13.184094] page_type: f5(slab)
[   13.184299] raw: 0200000000000000 ffff888101c02c80 dead000000000122 0000000000000000
[   13.184597] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   13.184942] page dumped because: kasan: bad access detected
[   13.185217] 
[   13.185318] Memory state around the buggy address:
[   13.185520]  ffff888102a0df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.185770]  ffff888102a0df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.186285] >ffff888102a0e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   13.186564]                    ^
[   13.186729]  ffff888102a0e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   13.187144]  ffff888102a0e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.187413] ==================================================================