[   30.921169] ==================================================================
[   30.921272] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x388/0x468
[   30.921354] Read of size 1 at addr fff00000c9b87000 by task kunit_try_catch/244
[   30.921580] 
[   30.921836] CPU: 0 UID: 0 PID: 244 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250714 #1 PREEMPT 
[   30.922328] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.922358] Hardware name: linux,dummy-virt (DT)
[   30.922394] Call trace:
[   30.922421]  show_stack+0x20/0x38 (C)
[   30.923145]  dump_stack_lvl+0x8c/0xd0
[   30.923448]  print_report+0x118/0x5d0
[   30.923509]  kasan_report+0xdc/0x128
[   30.923712]  __asan_report_load1_noabort+0x20/0x30
[   30.923853]  kmem_cache_rcu_uaf+0x388/0x468
[   30.924033]  kunit_try_run_case+0x170/0x3f0
[   30.924111]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.924425]  kthread+0x328/0x630
[   30.924501]  ret_from_fork+0x10/0x20
[   30.924714] 
[   30.924828] Allocated by task 244:
[   30.925002]  kasan_save_stack+0x3c/0x68
[   30.925066]  kasan_save_track+0x20/0x40
[   30.925521]  kasan_save_alloc_info+0x40/0x58
[   30.925702]  __kasan_slab_alloc+0xa8/0xb0
[   30.925794]  kmem_cache_alloc_noprof+0x10c/0x398
[   30.925837]  kmem_cache_rcu_uaf+0x12c/0x468
[   30.925887]  kunit_try_run_case+0x170/0x3f0
[   30.925925]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.926108]  kthread+0x328/0x630
[   30.926411]  ret_from_fork+0x10/0x20
[   30.926462] 
[   30.926509] Freed by task 0:
[   30.926541]  kasan_save_stack+0x3c/0x68
[   30.926579]  kasan_save_track+0x20/0x40
[   30.926839]  kasan_save_free_info+0x4c/0x78
[   30.926883]  __kasan_slab_free+0x6c/0x98
[   30.926922]  slab_free_after_rcu_debug+0xd4/0x2f8
[   30.926963]  rcu_core+0x9f4/0x1e20
[   30.927002]  rcu_core_si+0x18/0x30
[   30.927037]  handle_softirqs+0x374/0xb28
[   30.927085]  __do_softirq+0x1c/0x28
[   30.927119] 
[   30.927138] Last potentially related work creation:
[   30.927165]  kasan_save_stack+0x3c/0x68
[   30.927514]  kasan_record_aux_stack+0xb4/0xc8
[   30.927619]  kmem_cache_free+0x120/0x468
[   30.927661]  kmem_cache_rcu_uaf+0x16c/0x468
[   30.927698]  kunit_try_run_case+0x170/0x3f0
[   30.928213]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.928258]  kthread+0x328/0x630
[   30.928570]  ret_from_fork+0x10/0x20
[   30.928719] 
[   30.928743] The buggy address belongs to the object at fff00000c9b87000
[   30.928743]  which belongs to the cache test_cache of size 200
[   30.928881] The buggy address is located 0 bytes inside of
[   30.928881]  freed 200-byte region [fff00000c9b87000, fff00000c9b870c8)
[   30.928974] 
[   30.928997] The buggy address belongs to the physical page:
[   30.929032] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109b87
[   30.929345] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.929487] page_type: f5(slab)
[   30.929612] raw: 0bfffe0000000000 fff00000c5687780 dead000000000122 0000000000000000
[   30.929707] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   30.929749] page dumped because: kasan: bad access detected
[   30.929782] 
[   30.929800] Memory state around the buggy address:
[   30.929906]  fff00000c9b86f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.930063]  fff00000c9b86f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.930106] >fff00000c9b87000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   30.930192]                    ^
[   30.930221]  fff00000c9b87080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   30.930711]  fff00000c9b87100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.930759] ==================================================================

[   25.086367] ==================================================================
[   25.086912] BUG: KASAN: slab-use-after-free in kmem_cache_rcu_uaf+0x3e3/0x510
[   25.087463] Read of size 1 at addr ffff8881060a2000 by task kunit_try_catch/262
[   25.087923] 
[   25.088019] CPU: 1 UID: 0 PID: 262 Comm: kunit_try_catch Tainted: G    B   W        N  6.16.0-rc6-next-20250714 #1 PREEMPT(voluntary) 
[   25.088077] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST
[   25.088091] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.088116] Call Trace:
[   25.088132]  <TASK>
[   25.088152]  dump_stack_lvl+0x73/0xb0
[   25.088188]  print_report+0xd1/0x610
[   25.088212]  ? __virt_addr_valid+0x1db/0x2d0
[   25.088237]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   25.088260]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.088286]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   25.088308]  kasan_report+0x141/0x180
[   25.088330]  ? kmem_cache_rcu_uaf+0x3e3/0x510
[   25.088356]  __asan_report_load1_noabort+0x18/0x20
[   25.088460]  kmem_cache_rcu_uaf+0x3e3/0x510
[   25.088487]  ? __pfx_kmem_cache_rcu_uaf+0x10/0x10
[   25.088510]  ? finish_task_switch.isra.0+0x153/0x700
[   25.088534]  ? __switch_to+0x47/0xf80
[   25.088564]  ? __pfx_read_tsc+0x10/0x10
[   25.088587]  ? ktime_get_ts64+0x86/0x230
[   25.088615]  kunit_try_run_case+0x1a5/0x480
[   25.088639]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.088671]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   25.088696]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.088719]  ? __kthread_parkme+0x82/0x180
[   25.088740]  ? preempt_count_sub+0x50/0x80
[   25.088774]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.088796]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.088821]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.088845]  kthread+0x337/0x6f0
[   25.088865]  ? trace_preempt_on+0x20/0xc0
[   25.088890]  ? __pfx_kthread+0x10/0x10
[   25.088911]  ? _raw_spin_unlock_irq+0x47/0x80
[   25.088932]  ? calculate_sigpending+0x7b/0xa0
[   25.088967]  ? __pfx_kthread+0x10/0x10
[   25.088988]  ret_from_fork+0x116/0x1d0
[   25.089009]  ? __pfx_kthread+0x10/0x10
[   25.089029]  ret_from_fork_asm+0x1a/0x30
[   25.089060]  </TASK>
[   25.089072] 
[   25.099565] Allocated by task 262:
[   25.099769]  kasan_save_stack+0x45/0x70
[   25.100420]  kasan_save_track+0x18/0x40
[   25.100596]  kasan_save_alloc_info+0x3b/0x50
[   25.100815]  __kasan_slab_alloc+0x91/0xa0
[   25.101197]  kmem_cache_alloc_noprof+0x123/0x3f0
[   25.101639]  kmem_cache_rcu_uaf+0x155/0x510
[   25.101970]  kunit_try_run_case+0x1a5/0x480
[   25.102183]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.102404]  kthread+0x337/0x6f0
[   25.102572]  ret_from_fork+0x116/0x1d0
[   25.102745]  ret_from_fork_asm+0x1a/0x30
[   25.103229] 
[   25.103323] Freed by task 0:
[   25.103434]  kasan_save_stack+0x45/0x70
[   25.103621]  kasan_save_track+0x18/0x40
[   25.104222]  kasan_save_free_info+0x3f/0x60
[   25.104401]  __kasan_slab_free+0x56/0x70
[   25.104755]  slab_free_after_rcu_debug+0xe4/0x310
[   25.105041]  rcu_core+0x66f/0x1c40
[   25.105288]  rcu_core_si+0x12/0x20
[   25.105474]  handle_softirqs+0x209/0x730
[   25.105885]  __irq_exit_rcu+0xc9/0x110
[   25.106031]  irq_exit_rcu+0x12/0x20
[   25.106384]  sysvec_apic_timer_interrupt+0x81/0x90
[   25.106619]  asm_sysvec_apic_timer_interrupt+0x1f/0x30
[   25.106890] 
[   25.106964] Last potentially related work creation:
[   25.107180]  kasan_save_stack+0x45/0x70
[   25.107366]  kasan_record_aux_stack+0xb2/0xc0
[   25.107531]  kmem_cache_free+0x131/0x420
[   25.107732]  kmem_cache_rcu_uaf+0x194/0x510
[   25.108584]  kunit_try_run_case+0x1a5/0x480
[   25.108741]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.109242]  kthread+0x337/0x6f0
[   25.109427]  ret_from_fork+0x116/0x1d0
[   25.109584]  ret_from_fork_asm+0x1a/0x30
[   25.109946] 
[   25.110165] The buggy address belongs to the object at ffff8881060a2000
[   25.110165]  which belongs to the cache test_cache of size 200
[   25.110829] The buggy address is located 0 bytes inside of
[   25.110829]  freed 200-byte region [ffff8881060a2000, ffff8881060a20c8)
[   25.111695] 
[   25.111863] The buggy address belongs to the physical page:
[   25.112311] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1060a2
[   25.112653] flags: 0x200000000000000(node=0|zone=2)
[   25.113125] page_type: f5(slab)
[   25.113287] raw: 0200000000000000 ffff8881060a0000 dead000000000122 0000000000000000
[   25.113751] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
[   25.114263] page dumped because: kasan: bad access detected
[   25.114583] 
[   25.114678] Memory state around the buggy address:
[   25.114892]  ffff8881060a1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.115256]  ffff8881060a1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.116150] >ffff8881060a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.116470]                    ^
[   25.116718]  ffff8881060a2080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   25.117189]  ffff8881060a2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.117733] ==================================================================