[   13.790329] ==================================================================
[   13.790933] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510
[   13.791555] Read of size 1 at addr ffff888103a5e000 by task kunit_try_catch/230
[   13.792183] 
[   13.792427] CPU: 0 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   13.792483] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.792496] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.792519] Call Trace:
[   13.792533]  <TASK>
[   13.792551]  dump_stack_lvl+0x73/0xb0
[   13.792584]  print_report+0xd1/0x610
[   13.792607]  ? __virt_addr_valid+0x1db/0x2d0
[   13.792632]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.792655]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.792679]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.792702]  kasan_report+0x141/0x180
[   13.792724]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.792751]  __asan_report_load1_noabort+0x18/0x20
[   13.792777]  kmem_cache_rcu_uaf+0x3e3/0x510
[   13.792800]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   13.792824]  ? finish_task_switch.isra.0+0x153/0x700
[   13.792849]  ? __switch_to+0x47/0xf50
[   13.792878]  ? __pfx_read_tsc+0x10/0x10
[   13.792900]  ? ktime_get_ts64+0x86/0x230
[   13.792925]  kunit_try_run_case+0x1a5/0x480
[   13.793190]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.793215]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.793241]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.793278]  ? __kthread_parkme+0x82/0x180
[   13.793300]  ? preempt_count_sub+0x50/0x80
[   13.793322]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.793348]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.793374]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.793400]  kthread+0x337/0x6f0
[   13.793419]  ? trace_preempt_on+0x20/0xc0
[   13.793444]  ? __pfx_kthread+0x10/0x10
[   13.793465]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.793487]  ? calculate_sigpending+0x7b/0xa0
[   13.793513]  ? __pfx_kthread+0x10/0x10
[   13.793535]  ret_from_fork+0x116/0x1d0
[   13.793554]  ? __pfx_kthread+0x10/0x10
[   13.793575]  ret_from_fork_asm+0x1a/0x30
[   13.793607]  </TASK>
[   13.793618] 
[   13.801636] Allocated by task 230:
[   13.801773]  kasan_save_stack+0x45/0x70
[   13.801922]  kasan_save_track+0x18/0x40
[   13.802154]  kasan_save_alloc_info+0x3b/0x50
[   13.802370]  __kasan_slab_alloc+0x91/0xa0
[   13.802558]  kmem_cache_alloc_noprof+0x123/0x3f0
[   13.802774]  kmem_cache_rcu_uaf+0x155/0x510
[   13.802968]  kunit_try_run_case+0x1a5/0x480
[   13.803210]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.803444]  kthread+0x337/0x6f0
[   13.803609]  ret_from_fork+0x116/0x1d0
[   13.803767]  ret_from_fork_asm+0x1a/0x30
[   13.803964] 
[   13.804118] Freed by task 0:
[   13.804283]  kasan_save_stack+0x45/0x70
[   13.804467]  kasan_save_track+0x18/0x40
[   13.804648]  kasan_save_free_info+0x3f/0x60
[   13.804801]  __kasan_slab_free+0x56/0x70
[   13.804940]  slab_free_after_rcu_debug+0xe4/0x310
[   13.805100]  rcu_core+0x66f/0x1c40
[   13.805228]  rcu_core_si+0x12/0x20
[   13.805364]  handle_softirqs+0x209/0x730
[   13.805561]  __irq_exit_rcu+0xc9/0x110
[   13.805786]  irq_exit_rcu+0x12/0x20
[   13.805964]  sysvec_apic_timer_interrupt+0x81/0x90
[   13.806195]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   13.806449] 
[   13.806545] Last potentially related work creation:
[   13.806793]  kasan_save_stack+0x45/0x70
[   13.806986]  kasan_record_aux_stack+0xb2/0xc0
[   13.807154]  kmem_cache_free+0x131/0x420
[   13.807558]  kmem_cache_rcu_uaf+0x194/0x510
[   13.807776]  kunit_try_run_case+0x1a5/0x480
[   13.808051]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.808344]  kthread+0x337/0x6f0
[   13.808466]  ret_from_fork+0x116/0x1d0
[   13.808601]  ret_from_fork_asm+0x1a/0x30
[   13.808741] 
[   13.808831] The buggy address belongs to the object at ffff888103a5e000
[   13.808831]  which belongs to the cache test_cache of size 200
[   13.809878] The buggy address is located 0 bytes inside of
[   13.809878]  freed 200-byte region [ffff888103a5e000, ffff888103a5e0c8)
[   13.810586] 
[   13.810672] The buggy address belongs to the physical page:
[   13.810907] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a5e
[   13.811619] flags: 0x200000000000000(node=0|zone=2)
[   13.811854] page_type: f5(slab)
[   13.812083] raw: 0200000000000000 ffff888103a56280 dead000000000122 0000000000000000
[   13.812413] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   13.812719] page dumped because: kasan: bad access detected
[   13.812945] 
[   13.813085] Memory state around the buggy address:
[   13.813291]  ffff888103a5df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.813582]  ffff888103a5df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.813870] >ffff888103a5e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   13.814213]                    ^
[   13.814379]  ffff888103a5e080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   13.814660]  ffff888103a5e100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.814957] ==================================================================