[   13.349152] ==================================================================
[   13.349688] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510
[   13.350313] Read of size 1 at addr ffff888103078000 by task kunit_try_catch/230
[   13.350625] 
[   13.350765] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6 #1 PREEMPT(voluntary) 
[   13.350813] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.350825] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.350846] Call Trace:
[   13.350858]  <TASK>
[   13.350877]  dump_stack_lvl+0x73/0xb0
[   13.350910]  print_report+0xd1/0x610
[   13.350934]  ? __virt_addr_valid+0x1db/0x2d0
[   13.350960]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.350982]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.351006]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.351029]  kasan_report+0x141/0x180
[   13.351051]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.351078]  __asan_report_load1_noabort+0x18/0x20
[   13.351103]  kmem_cache_rcu_uaf+0x3e3/0x510
[   13.351126]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   13.351149]  ? finish_task_switch.isra.0+0x153/0x700
[   13.351178]  ? __switch_to+0x47/0xf50
[   13.351269]  ? __pfx_read_tsc+0x10/0x10
[   13.351292]  ? ktime_get_ts64+0x86/0x230
[   13.351317]  kunit_try_run_case+0x1a5/0x480
[   13.351344]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.351367]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.351393]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.351417]  ? __kthread_parkme+0x82/0x180
[   13.351438]  ? preempt_count_sub+0x50/0x80
[   13.351475]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.351499]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.351524]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.351549]  kthread+0x337/0x6f0
[   13.351568]  ? trace_preempt_on+0x20/0xc0
[   13.351592]  ? __pfx_kthread+0x10/0x10
[   13.351613]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.351634]  ? calculate_sigpending+0x7b/0xa0
[   13.351659]  ? __pfx_kthread+0x10/0x10
[   13.351680]  ret_from_fork+0x116/0x1d0
[   13.351699]  ? __pfx_kthread+0x10/0x10
[   13.351720]  ret_from_fork_asm+0x1a/0x30
[   13.352163]  </TASK>
[   13.352178] 
[   13.361017] Allocated by task 230:
[   13.361238]  kasan_save_stack+0x45/0x70
[   13.361465]  kasan_save_track+0x18/0x40
[   13.361623]  kasan_save_alloc_info+0x3b/0x50
[   13.361784]  __kasan_slab_alloc+0x91/0xa0
[   13.361959]  kmem_cache_alloc_noprof+0x123/0x3f0
[   13.362779]  kmem_cache_rcu_uaf+0x155/0x510
[   13.362989]  kunit_try_run_case+0x1a5/0x480
[   13.363187]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.363423]  kthread+0x337/0x6f0
[   13.363581]  ret_from_fork+0x116/0x1d0
[   13.363766]  ret_from_fork_asm+0x1a/0x30
[   13.363951] 
[   13.364043] Freed by task 0:
[   13.364191]  kasan_save_stack+0x45/0x70
[   13.364371]  kasan_save_track+0x18/0x40
[   13.364546]  kasan_save_free_info+0x3f/0x60
[   13.364735]  __kasan_slab_free+0x56/0x70
[   13.365468]  slab_free_after_rcu_debug+0xe4/0x310
[   13.365644]  rcu_core+0x66f/0x1c40
[   13.365784]  rcu_core_si+0x12/0x20
[   13.365954]  handle_softirqs+0x209/0x730
[   13.366367]  __irq_exit_rcu+0xc9/0x110
[   13.366620]  irq_exit_rcu+0x12/0x20
[   13.366849]  sysvec_apic_timer_interrupt+0x81/0x90
[   13.367234]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   13.367510] 
[   13.367610] Last potentially related work creation:
[   13.367846]  kasan_save_stack+0x45/0x70
[   13.368464]  kasan_record_aux_stack+0xb2/0xc0
[   13.368743]  kmem_cache_free+0x131/0x420
[   13.369072]  kmem_cache_rcu_uaf+0x194/0x510
[   13.369319]  kunit_try_run_case+0x1a5/0x480
[   13.369530]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.369872]  kthread+0x337/0x6f0
[   13.370111]  ret_from_fork+0x116/0x1d0
[   13.370390]  ret_from_fork_asm+0x1a/0x30
[   13.370567] 
[   13.370774] The buggy address belongs to the object at ffff888103078000
[   13.370774]  which belongs to the cache test_cache of size 200
[   13.371482] The buggy address is located 0 bytes inside of
[   13.371482]  freed 200-byte region [ffff888103078000, ffff8881030780c8)
[   13.372193] 
[   13.372321] The buggy address belongs to the physical page:
[   13.372553] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103078
[   13.373123] flags: 0x200000000000000(node=0|zone=2)
[   13.373330] page_type: f5(slab)
[   13.373578] raw: 0200000000000000 ffff888103074140 dead000000000122 0000000000000000
[   13.373884] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   13.374414] page dumped because: kasan: bad access detected
[   13.374719] 
[   13.374823] Memory state around the buggy address:
[   13.375221]  ffff888103077f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.375600]  ffff888103077f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.375907] >ffff888103078000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   13.376447]                    ^
[   13.376655]  ffff888103078080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   13.377084]  ffff888103078100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.377434] ==================================================================