[   25.631619] ==================================================================
[   25.632583] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e5/0x510
[   25.633319] Read of size 1 at addr ffff888102411000 by task kunit_try_catch/220
[   25.634399] 
[   25.634677] CPU: 1 UID: 0 PID: 220 Comm: kunit_try_catch Tainted: G    B            N 6.13.0-rc2-next-20241209 #1
[   25.636259] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.636792] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.637580] Call Trace:
[   25.637869]  <TASK>
[   25.638146]  dump_stack_lvl+0x73/0xb0
[   25.638588]  print_report+0xd1/0x640
[   25.639072]  ? __virt_addr_valid+0x1db/0x2d0
[   25.639409]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.640051]  kasan_report+0x102/0x140
[   25.640624]  ? kmem_cache_rcu_uaf+0x3e5/0x510
[   25.641162]  ? kmem_cache_rcu_uaf+0x3e5/0x510
[   25.641678]  __asan_report_load1_noabort+0x18/0x20
[   25.642309]  kmem_cache_rcu_uaf+0x3e5/0x510
[   25.642656]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   25.643362]  ? finish_task_switch.isra.0+0x153/0x700
[   25.643836]  ? __switch_to+0x5d9/0xf60
[   25.644381]  ? __pfx_read_tsc+0x10/0x10
[   25.645031]  ? ktime_get_ts64+0x86/0x230
[   25.645436]  kunit_try_run_case+0x1b3/0x490
[   25.646069]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.646540]  ? _raw_spin_lock_irqsave+0xa2/0x110
[   25.647140]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.647632]  ? __kthread_parkme+0x82/0x160
[   25.648174]  ? preempt_count_sub+0x50/0x80
[   25.648736]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.649180]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.649979]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.650500]  kthread+0x257/0x310
[   25.651049]  ? __pfx_kthread+0x10/0x10
[   25.651421]  ret_from_fork+0x41/0x80
[   25.651952]  ? __pfx_kthread+0x10/0x10
[   25.652432]  ret_from_fork_asm+0x1a/0x30
[   25.652930]  </TASK>
[   25.653327] 
[   25.653503] Allocated by task 220:
[   25.653966]  kasan_save_stack+0x3d/0x60
[   25.654456]  kasan_save_track+0x18/0x40
[   25.655006]  kasan_save_alloc_info+0x3b/0x50
[   25.655512]  __kasan_slab_alloc+0x91/0xa0
[   25.656037]  kmem_cache_alloc_noprof+0x11e/0x3e0
[   25.656479]  kmem_cache_rcu_uaf+0x156/0x510
[   25.657062]  kunit_try_run_case+0x1b3/0x490
[   25.657474]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.658083]  kthread+0x257/0x310
[   25.658446]  ret_from_fork+0x41/0x80
[   25.658948]  ret_from_fork_asm+0x1a/0x30
[   25.659387] 
[   25.659695] Freed by task 0:
[   25.660089]  kasan_save_stack+0x3d/0x60
[   25.660638]  kasan_save_track+0x18/0x40
[   25.661168]  kasan_save_free_info+0x3f/0x60
[   25.661574]  __kasan_slab_free+0x56/0x70
[   25.662153]  slab_free_after_rcu_debug+0xe4/0x310
[   25.662590]  rcu_core+0x680/0x1d70
[   25.663155]  rcu_core_si+0x12/0x20
[   25.663589]  handle_softirqs+0x209/0x720
[   25.664075]  __irq_exit_rcu+0xc9/0x110
[   25.664582]  irq_exit_rcu+0x12/0x20
[   25.665116]  sysvec_apic_timer_interrupt+0x81/0x90
[   25.665726]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   25.666321] 
[   25.666640] Last potentially related work creation:
[   25.667180]  kasan_save_stack+0x3d/0x60
[   25.667590]  kasan_record_aux_stack+0xb2/0xc0
[   25.668065]  kmem_cache_free+0x284/0x420
[   25.668623]  kmem_cache_rcu_uaf+0x195/0x510
[   25.669138]  kunit_try_run_case+0x1b3/0x490
[   25.669696]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.670243]  kthread+0x257/0x310
[   25.670690]  ret_from_fork+0x41/0x80
[   25.671180]  ret_from_fork_asm+0x1a/0x30
[   25.671597] 
[   25.671842] The buggy address belongs to the object at ffff888102411000
[   25.671842]  which belongs to the cache test_cache of size 200
[   25.672756] The buggy address is located 0 bytes inside of
[   25.672756]  freed 200-byte region [ffff888102411000, ffff8881024110c8)
[   25.674095] 
[   25.674410] The buggy address belongs to the physical page:
[   25.674837] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102411
[   25.675696] flags: 0x200000000000000(node=0|zone=2)
[   25.676327] page_type: f5(slab)
[   25.676789] raw: 0200000000000000 ffff888101012c80 dead000000000122 0000000000000000
[   25.677473] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   25.678095] page dumped because: kasan: bad access detected
[   25.678680] 
[   25.679035] Memory state around the buggy address:
[   25.679452]  ffff888102410f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.680334]  ffff888102410f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.681089] >ffff888102411000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.682003]                    ^
[   25.682225]  ffff888102411080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   25.683604]  ffff888102411100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.684483] ==================================================================