[   27.595444] ==================================================================
[   27.595705] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0
[   27.595957] Read of size 1 at addr ffff88810618c690 by task kunit_try_catch/308
[   27.596435] 
[   27.596539] CPU: 0 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250717 #1 PREEMPT(voluntary) 
[   27.596587] Tainted: [B]=BAD_PAGE, [N]=TEST
[   27.596598] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   27.596618] Call Trace:
[   27.596633]  <TASK>
[   27.596647]  dump_stack_lvl+0x73/0xb0
[   27.596675]  print_report+0xd1/0x610
[   27.596697]  ? __virt_addr_valid+0x1db/0x2d0
[   27.596719]  ? strlen+0x8f/0xb0
[   27.596736]  ? kasan_complete_mode_report_info+0x64/0x200
[   27.596761]  ? strlen+0x8f/0xb0
[   27.596778]  kasan_report+0x141/0x180
[   27.596800]  ? strlen+0x8f/0xb0
[   27.596822]  __asan_report_load1_noabort+0x18/0x20
[   27.596845]  strlen+0x8f/0xb0
[   27.596862]  kasan_strings+0x57b/0xe80
[   27.596882]  ? trace_hardirqs_on+0x37/0xe0
[   27.596904]  ? __pfx_kasan_strings+0x10/0x10
[   27.596923]  ? finish_task_switch.isra.0+0x153/0x700
[   27.596963]  ? __switch_to+0x47/0xf80
[   27.596988]  ? __schedule+0x10c6/0x2b60
[   27.597010]  ? __pfx_read_tsc+0x10/0x10
[   27.597041]  ? ktime_get_ts64+0x86/0x230
[   27.597065]  kunit_try_run_case+0x1a5/0x480
[   27.597098]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.597120]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   27.597142]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   27.597167]  ? __kthread_parkme+0x82/0x180
[   27.597190]  ? preempt_count_sub+0x50/0x80
[   27.597212]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.597235]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.597320]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   27.597343]  kthread+0x337/0x6f0
[   27.597362]  ? trace_preempt_on+0x20/0xc0
[   27.597384]  ? __pfx_kthread+0x10/0x10
[   27.597404]  ? _raw_spin_unlock_irq+0x47/0x80
[   27.597425]  ? calculate_sigpending+0x7b/0xa0
[   27.597448]  ? __pfx_kthread+0x10/0x10
[   27.597469]  ret_from_fork+0x116/0x1d0
[   27.597487]  ? __pfx_kthread+0x10/0x10
[   27.597507]  ret_from_fork_asm+0x1a/0x30
[   27.597538]  </TASK>
[   27.597709] 
[   27.610925] Allocated by task 308:
[   27.611056]  kasan_save_stack+0x45/0x70
[   27.611424]  kasan_save_track+0x18/0x40
[   27.612238]  kasan_save_alloc_info+0x3b/0x50
[   27.613134]  __kasan_kmalloc+0xb7/0xc0
[   27.613707]  __kmalloc_cache_noprof+0x189/0x420
[   27.614236]  kasan_strings+0xc0/0xe80
[   27.614748]  kunit_try_run_case+0x1a5/0x480
[   27.615225]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.615835]  kthread+0x337/0x6f0
[   27.615971]  ret_from_fork+0x116/0x1d0
[   27.616114]  ret_from_fork_asm+0x1a/0x30
[   27.616297] 
[   27.616451] Freed by task 308:
[   27.617046]  kasan_save_stack+0x45/0x70
[   27.617508]  kasan_save_track+0x18/0x40
[   27.617847]  kasan_save_free_info+0x3f/0x60
[   27.618224]  __kasan_slab_free+0x56/0x70
[   27.618620]  kfree+0x222/0x3f0
[   27.619871]  kasan_strings+0x2aa/0xe80
[   27.620021]  kunit_try_run_case+0x1a5/0x480
[   27.620175]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.620343]  kthread+0x337/0x6f0
[   27.620456]  ret_from_fork+0x116/0x1d0
[   27.620580]  ret_from_fork_asm+0x1a/0x30
[   27.620712] 
[   27.620775] The buggy address belongs to the object at ffff88810618c680
[   27.620775]  which belongs to the cache kmalloc-32 of size 32
[   27.621323] The buggy address is located 16 bytes inside of
[   27.621323]  freed 32-byte region [ffff88810618c680, ffff88810618c6a0)
[   27.622985] 
[   27.623267] The buggy address belongs to the physical page:
[   27.623990] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10618c
[   27.624845] flags: 0x200000000000000(node=0|zone=2)
[   27.625648] page_type: f5(slab)
[   27.626056] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   27.626861] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   27.627696] page dumped because: kasan: bad access detected
[   27.628331] 
[   27.628605] Memory state around the buggy address:
[   27.629149]  ffff88810618c580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.629794]  ffff88810618c600: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.630224] >ffff88810618c680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.631067]                          ^
[   27.631216]  ffff88810618c700: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.632133]  ffff88810618c780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.632586] ==================================================================