[   25.397318] ==================================================================
[   25.398027] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360
[   25.398510] Write of size 33 at addr ffff8881055f0200 by task kunit_try_catch/234
[   25.399251] 
[   25.399398] CPU: 1 UID: 0 PID: 234 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc7-next-20250722 #1 PREEMPT(voluntary) 
[   25.399579] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.399594] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.399617] Call Trace:
[   25.399632]  <TASK>
[   25.399650]  dump_stack_lvl+0x73/0xb0
[   25.399683]  print_report+0xd1/0x640
[   25.399706]  ? __virt_addr_valid+0x1db/0x2d0
[   25.399731]  ? kmalloc_uaf_memset+0x1a3/0x360
[   25.399752]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.399777]  ? kmalloc_uaf_memset+0x1a3/0x360
[   25.399801]  kasan_report+0x141/0x180
[   25.399824]  ? kmalloc_uaf_memset+0x1a3/0x360
[   25.399865]  kasan_check_range+0x10c/0x1c0
[   25.399888]  __asan_memset+0x27/0x50
[   25.399912]  kmalloc_uaf_memset+0x1a3/0x360
[   25.399933]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   25.399956]  ? __schedule+0x10da/0x2b60
[   25.399981]  ? __pfx_read_tsc+0x10/0x10
[   25.400003]  ? ktime_get_ts64+0x86/0x230
[   25.400029]  kunit_try_run_case+0x1a5/0x480
[   25.400055]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.400077]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   25.400102]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.400127]  ? __kthread_parkme+0x82/0x180
[   25.400147]  ? preempt_count_sub+0x50/0x80
[   25.400181]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.400205]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.400229]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.400253]  kthread+0x337/0x6f0
[   25.400273]  ? trace_preempt_on+0x20/0xc0
[   25.400297]  ? __pfx_kthread+0x10/0x10
[   25.400317]  ? _raw_spin_unlock_irq+0x47/0x80
[   25.400340]  ? calculate_sigpending+0x7b/0xa0
[   25.400364]  ? __pfx_kthread+0x10/0x10
[   25.400387]  ret_from_fork+0x116/0x1d0
[   25.400406]  ? __pfx_kthread+0x10/0x10
[   25.400427]  ret_from_fork_asm+0x1a/0x30
[   25.400459]  </TASK>
[   25.400472] 
[   25.411102] Allocated by task 234:
[   25.411325]  kasan_save_stack+0x45/0x70
[   25.411679]  kasan_save_track+0x18/0x40
[   25.411960]  kasan_save_alloc_info+0x3b/0x50
[   25.412325]  __kasan_kmalloc+0xb7/0xc0
[   25.412611]  __kmalloc_cache_noprof+0x189/0x420
[   25.412784]  kmalloc_uaf_memset+0xa9/0x360
[   25.413010]  kunit_try_run_case+0x1a5/0x480
[   25.413664]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.413927]  kthread+0x337/0x6f0
[   25.414103]  ret_from_fork+0x116/0x1d0
[   25.414616]  ret_from_fork_asm+0x1a/0x30
[   25.414786] 
[   25.415069] Freed by task 234:
[   25.415265]  kasan_save_stack+0x45/0x70
[   25.415655]  kasan_save_track+0x18/0x40
[   25.415840]  kasan_save_free_info+0x3f/0x60
[   25.416046]  __kasan_slab_free+0x56/0x70
[   25.416231]  kfree+0x222/0x3f0
[   25.416691]  kmalloc_uaf_memset+0x12b/0x360
[   25.416860]  kunit_try_run_case+0x1a5/0x480
[   25.417264]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.417710]  kthread+0x337/0x6f0
[   25.418012]  ret_from_fork+0x116/0x1d0
[   25.418354]  ret_from_fork_asm+0x1a/0x30
[   25.418714] 
[   25.418802] The buggy address belongs to the object at ffff8881055f0200
[   25.418802]  which belongs to the cache kmalloc-64 of size 64
[   25.419396] The buggy address is located 0 bytes inside of
[   25.419396]  freed 64-byte region [ffff8881055f0200, ffff8881055f0240)
[   25.420039] 
[   25.420123] The buggy address belongs to the physical page:
[   25.420490] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055f0
[   25.420949] flags: 0x200000000000000(node=0|zone=2)
[   25.421225] page_type: f5(slab)
[   25.421403] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   25.421927] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   25.422330] page dumped because: kasan: bad access detected
[   25.422724] 
[   25.422795] Memory state around the buggy address:
[   25.423031]  ffff8881055f0100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   25.423378]  ffff8881055f0180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   25.423736] >ffff8881055f0200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   25.423960]                    ^
[   25.424140]  ffff8881055f0280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.424572]  ffff8881055f0300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.425048] ==================================================================