[   13.488643] ==================================================================
[   13.489877] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510
[   13.490540] Read of size 1 at addr ffff888102d76000 by task kunit_try_catch/230
[   13.491171] 
[   13.491353] CPU: 1 UID: 0 PID: 230 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   13.491409] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.491421] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.491441] Call Trace:
[   13.491455]  <TASK>
[   13.491474]  dump_stack_lvl+0x73/0xb0
[   13.491537]  print_report+0xd1/0x650
[   13.491561]  ? __virt_addr_valid+0x1db/0x2d0
[   13.491585]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.491607]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.491629]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.491652]  kasan_report+0x141/0x180
[   13.491673]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   13.491700]  __asan_report_load1_noabort+0x18/0x20
[   13.491724]  kmem_cache_rcu_uaf+0x3e3/0x510
[   13.491747]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   13.491769]  ? sysvec_apic_timer_interrupt+0x50/0x90
[   13.491800]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   13.491827]  kunit_try_run_case+0x1a5/0x480
[   13.491852]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.491874]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.491899]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.491922]  ? __kthread_parkme+0x82/0x180
[   13.491943]  ? preempt_count_sub+0x50/0x80
[   13.491967]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.491991]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.492014]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.492039]  kthread+0x337/0x6f0
[   13.492069]  ? trace_preempt_on+0x20/0xc0
[   13.492093]  ? __pfx_kthread+0x10/0x10
[   13.492113]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.492147]  ? calculate_sigpending+0x7b/0xa0
[   13.492171]  ? __pfx_kthread+0x10/0x10
[   13.492209]  ret_from_fork+0x116/0x1d0
[   13.492229]  ? __pfx_kthread+0x10/0x10
[   13.492249]  ret_from_fork_asm+0x1a/0x30
[   13.492280]  </TASK>
[   13.492290] 
[   13.505300] Allocated by task 230:
[   13.505642]  kasan_save_stack+0x45/0x70
[   13.505995]  kasan_save_track+0x18/0x40
[   13.506332]  kasan_save_alloc_info+0x3b/0x50
[   13.506836]  __kasan_slab_alloc+0x91/0xa0
[   13.507209]  kmem_cache_alloc_noprof+0x123/0x3f0
[   13.507675]  kmem_cache_rcu_uaf+0x155/0x510
[   13.507818]  kunit_try_run_case+0x1a5/0x480
[   13.507959]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.508128]  kthread+0x337/0x6f0
[   13.508252]  ret_from_fork+0x116/0x1d0
[   13.508398]  ret_from_fork_asm+0x1a/0x30
[   13.508804] 
[   13.508957] Freed by task 0:
[   13.509217]  kasan_save_stack+0x45/0x70
[   13.509644]  kasan_save_track+0x18/0x40
[   13.510051]  kasan_save_free_info+0x3f/0x60
[   13.510509]  __kasan_slab_free+0x56/0x70
[   13.510882]  slab_free_after_rcu_debug+0xe4/0x310
[   13.511397]  rcu_core+0x66f/0x1c40
[   13.511744]  rcu_core_si+0x12/0x20
[   13.512053]  handle_softirqs+0x209/0x730
[   13.512418]  __irq_exit_rcu+0xc9/0x110
[   13.512806]  irq_exit_rcu+0x12/0x20
[   13.512972]  sysvec_apic_timer_interrupt+0x81/0x90
[   13.513593]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   13.514068] 
[   13.514230] Last potentially related work creation:
[   13.514746]  kasan_save_stack+0x45/0x70
[   13.515178]  kasan_record_aux_stack+0xb2/0xc0
[   13.515644]  kmem_cache_free+0x131/0x420
[   13.516014]  kmem_cache_rcu_uaf+0x194/0x510
[   13.516303]  kunit_try_run_case+0x1a5/0x480
[   13.516728]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.517169]  kthread+0x337/0x6f0
[   13.517286]  ret_from_fork+0x116/0x1d0
[   13.517465]  ret_from_fork_asm+0x1a/0x30
[   13.517907] 
[   13.518071] The buggy address belongs to the object at ffff888102d76000
[   13.518071]  which belongs to the cache test_cache of size 200
[   13.519407] The buggy address is located 0 bytes inside of
[   13.519407]  freed 200-byte region [ffff888102d76000, ffff888102d760c8)
[   13.519743] 
[   13.519815] The buggy address belongs to the physical page:
[   13.519981] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d76
[   13.520217] flags: 0x200000000000000(node=0|zone=2)
[   13.520426] page_type: f5(slab)
[   13.520558] raw: 0200000000000000 ffff888100ff4c80 dead000000000122 0000000000000000
[   13.520988] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   13.521779] page dumped because: kasan: bad access detected
[   13.522280] 
[   13.522549] Memory state around the buggy address:
[   13.522971]  ffff888102d75f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.523674]  ffff888102d75f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.524158] >ffff888102d76000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   13.524467]                    ^
[   13.524788]  ffff888102d76080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   13.525822]  ffff888102d76100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.526495] ==================================================================