[   25.908347] ==================================================================
[   25.908979] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360
[   25.909450] Write of size 33 at addr ffff888102b16e00 by task kunit_try_catch/215
[   25.910062] 
[   25.910567] CPU: 1 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc2-next-20250620 #1 PREEMPT(voluntary) 
[   25.910685] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.910713] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.910866] Call Trace:
[   25.910901]  <TASK>
[   25.910942]  dump_stack_lvl+0x73/0xb0
[   25.911099]  print_report+0xd1/0x650
[   25.911164]  ? __virt_addr_valid+0x1db/0x2d0
[   25.911234]  ? kmalloc_uaf_memset+0x1a3/0x360
[   25.911271]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.911342]  ? kmalloc_uaf_memset+0x1a3/0x360
[   25.911404]  kasan_report+0x141/0x180
[   25.911462]  ? kmalloc_uaf_memset+0x1a3/0x360
[   25.911511]  kasan_check_range+0x10c/0x1c0
[   25.911541]  __asan_memset+0x27/0x50
[   25.911562]  kmalloc_uaf_memset+0x1a3/0x360
[   25.911583]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   25.911606]  ? __schedule+0x10cc/0x2b60
[   25.911631]  ? __pfx_read_tsc+0x10/0x10
[   25.911654]  ? ktime_get_ts64+0x86/0x230
[   25.911684]  kunit_try_run_case+0x1a5/0x480
[   25.911722]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.911794]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   25.911838]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.911875]  ? __kthread_parkme+0x82/0x180
[   25.911900]  ? preempt_count_sub+0x50/0x80
[   25.911928]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.911955]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.911979]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.912002]  kthread+0x337/0x6f0
[   25.912023]  ? trace_preempt_on+0x20/0xc0
[   25.912049]  ? __pfx_kthread+0x10/0x10
[   25.912071]  ? _raw_spin_unlock_irq+0x47/0x80
[   25.912092]  ? calculate_sigpending+0x7b/0xa0
[   25.912118]  ? __pfx_kthread+0x10/0x10
[   25.912140]  ret_from_fork+0x116/0x1d0
[   25.912187]  ? __pfx_kthread+0x10/0x10
[   25.912212]  ret_from_fork_asm+0x1a/0x30
[   25.912248]  </TASK>
[   25.912262] 
[   25.925230] Allocated by task 215:
[   25.925613]  kasan_save_stack+0x45/0x70
[   25.925989]  kasan_save_track+0x18/0x40
[   25.926325]  kasan_save_alloc_info+0x3b/0x50
[   25.927469]  __kasan_kmalloc+0xb7/0xc0
[   25.928004]  __kmalloc_cache_noprof+0x189/0x420
[   25.928423]  kmalloc_uaf_memset+0xa9/0x360
[   25.928934]  kunit_try_run_case+0x1a5/0x480
[   25.929167]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.929589]  kthread+0x337/0x6f0
[   25.930192]  ret_from_fork+0x116/0x1d0
[   25.931111]  ret_from_fork_asm+0x1a/0x30
[   25.931593] 
[   25.931706] Freed by task 215:
[   25.931868]  kasan_save_stack+0x45/0x70
[   25.932185]  kasan_save_track+0x18/0x40
[   25.932521]  kasan_save_free_info+0x3f/0x60
[   25.932768]  __kasan_slab_free+0x56/0x70
[   25.932964]  kfree+0x222/0x3f0
[   25.933996]  kmalloc_uaf_memset+0x12b/0x360
[   25.934305]  kunit_try_run_case+0x1a5/0x480
[   25.934487]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.935405]  kthread+0x337/0x6f0
[   25.936059]  ret_from_fork+0x116/0x1d0
[   25.936532]  ret_from_fork_asm+0x1a/0x30
[   25.936883] 
[   25.937052] The buggy address belongs to the object at ffff888102b16e00
[   25.937052]  which belongs to the cache kmalloc-64 of size 64
[   25.937922] The buggy address is located 0 bytes inside of
[   25.937922]  freed 64-byte region [ffff888102b16e00, ffff888102b16e40)
[   25.938945] 
[   25.939345] The buggy address belongs to the physical page:
[   25.939863] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b16
[   25.940189] flags: 0x200000000000000(node=0|zone=2)
[   25.940644] page_type: f5(slab)
[   25.941604] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   25.942021] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   25.942785] page dumped because: kasan: bad access detected
[   25.943118] 
[   25.943272] Memory state around the buggy address:
[   25.943733]  ffff888102b16d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   25.944562]  ffff888102b16d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   25.944995] >ffff888102b16e00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   25.945267]                    ^
[   25.945431]  ffff888102b16e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.945687]  ffff888102b16f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.946169] ==================================================================