[   14.371646] ==================================================================
[   14.372461] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360
[   14.373175] Write of size 33 at addr ffff888102b50e80 by task kunit_try_catch/204
[   14.373670] 
[   14.374063] CPU: 0 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) 
[   14.374169] Tainted: [B]=BAD_PAGE, [N]=TEST
[   14.374194] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   14.374252] Call Trace:
[   14.374280]  <TASK>
[   14.374327]  dump_stack_lvl+0x73/0xb0
[   14.374402]  print_report+0xd1/0x650
[   14.374491]  ? __virt_addr_valid+0x1db/0x2d0
[   14.374545]  ? kmalloc_uaf_memset+0x1a3/0x360
[   14.374583]  ? kasan_complete_mode_report_info+0x64/0x200
[   14.374618]  ? kmalloc_uaf_memset+0x1a3/0x360
[   14.374642]  kasan_report+0x141/0x180
[   14.374665]  ? kmalloc_uaf_memset+0x1a3/0x360
[   14.374691]  kasan_check_range+0x10c/0x1c0
[   14.374714]  __asan_memset+0x27/0x50
[   14.374733]  kmalloc_uaf_memset+0x1a3/0x360
[   14.374753]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   14.374775]  ? __schedule+0x10cc/0x2b60
[   14.374797]  ? __pfx_read_tsc+0x10/0x10
[   14.374819]  ? ktime_get_ts64+0x86/0x230
[   14.374843]  kunit_try_run_case+0x1a5/0x480
[   14.374869]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.374891]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   14.374912]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   14.374933]  ? __kthread_parkme+0x82/0x180
[   14.374954]  ? preempt_count_sub+0x50/0x80
[   14.374977]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.374999]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.375021]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   14.375042]  kthread+0x337/0x6f0
[   14.375060]  ? trace_preempt_on+0x20/0xc0
[   14.375083]  ? __pfx_kthread+0x10/0x10
[   14.375103]  ? _raw_spin_unlock_irq+0x47/0x80
[   14.375123]  ? calculate_sigpending+0x7b/0xa0
[   14.375146]  ? __pfx_kthread+0x10/0x10
[   14.375167]  ret_from_fork+0x116/0x1d0
[   14.375184]  ? __pfx_kthread+0x10/0x10
[   14.375204]  ret_from_fork_asm+0x1a/0x30
[   14.375255]  </TASK>
[   14.375269] 
[   14.385969] Allocated by task 204:
[   14.386255]  kasan_save_stack+0x45/0x70
[   14.386755]  kasan_save_track+0x18/0x40
[   14.387057]  kasan_save_alloc_info+0x3b/0x50
[   14.387374]  __kasan_kmalloc+0xb7/0xc0
[   14.388053]  __kmalloc_cache_noprof+0x189/0x420
[   14.388367]  kmalloc_uaf_memset+0xa9/0x360
[   14.388810]  kunit_try_run_case+0x1a5/0x480
[   14.389022]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.389377]  kthread+0x337/0x6f0
[   14.389837]  ret_from_fork+0x116/0x1d0
[   14.390154]  ret_from_fork_asm+0x1a/0x30
[   14.390640] 
[   14.390809] Freed by task 204:
[   14.391041]  kasan_save_stack+0x45/0x70
[   14.391326]  kasan_save_track+0x18/0x40
[   14.392063]  kasan_save_free_info+0x3f/0x60
[   14.392321]  __kasan_slab_free+0x56/0x70
[   14.392809]  kfree+0x222/0x3f0
[   14.392992]  kmalloc_uaf_memset+0x12b/0x360
[   14.393279]  kunit_try_run_case+0x1a5/0x480
[   14.393697]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.394087]  kthread+0x337/0x6f0
[   14.394261]  ret_from_fork+0x116/0x1d0
[   14.394718]  ret_from_fork_asm+0x1a/0x30
[   14.395043] 
[   14.395211] The buggy address belongs to the object at ffff888102b50e80
[   14.395211]  which belongs to the cache kmalloc-64 of size 64
[   14.396202] The buggy address is located 0 bytes inside of
[   14.396202]  freed 64-byte region [ffff888102b50e80, ffff888102b50ec0)
[   14.396991] 
[   14.397118] The buggy address belongs to the physical page:
[   14.397633] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b50
[   14.398102] flags: 0x200000000000000(node=0|zone=2)
[   14.398425] page_type: f5(slab)
[   14.398865] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   14.399175] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   14.399434] page dumped because: kasan: bad access detected
[   14.400286] 
[   14.400600] Memory state around the buggy address:
[   14.400956]  ffff888102b50d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   14.401314]  ffff888102b50e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   14.401884] >ffff888102b50e80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   14.402182]                    ^
[   14.402604]  ffff888102b50f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.403002]  ffff888102b50f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.403304] ==================================================================