[   23.810074] ==================================================================
[   23.811040] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   23.811274] Read of size 1 at addr ffff888102596f90 by task kunit_try_catch/288
[   23.811580] 
[   23.811664] CPU: 0 UID: 0 PID: 288 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250625 #1 PREEMPT(voluntary) 
[   23.811713] Tainted: [B]=BAD_PAGE, [N]=TEST
[   23.811726] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   23.811748] Call Trace:
[   23.811767]  <TASK>
[   23.811786]  dump_stack_lvl+0x73/0xb0
[   23.811810]  print_report+0xd1/0x650
[   23.811831]  ? __virt_addr_valid+0x1db/0x2d0
[   23.811854]  ? strnlen+0x73/0x80
[   23.811873]  ? kasan_complete_mode_report_info+0x64/0x200
[   23.811897]  ? strnlen+0x73/0x80
[   23.811917]  kasan_report+0x141/0x180
[   23.811952]  ? strnlen+0x73/0x80
[   23.812015]  __asan_report_load1_noabort+0x18/0x20
[   23.812041]  strnlen+0x73/0x80
[   23.812061]  kasan_strings+0x615/0xe80
[   23.812080]  ? trace_hardirqs_on+0x37/0xe0
[   23.812102]  ? __pfx_kasan_strings+0x10/0x10
[   23.812121]  ? finish_task_switch.isra.0+0x153/0x700
[   23.812143]  ? __switch_to+0x47/0xf50
[   23.812167]  ? __schedule+0x10cc/0x2b60
[   23.812192]  ? __pfx_read_tsc+0x10/0x10
[   23.812245]  ? ktime_get_ts64+0x86/0x230
[   23.812269]  kunit_try_run_case+0x1a5/0x480
[   23.812295]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.812317]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   23.812344]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   23.812369]  ? __kthread_parkme+0x82/0x180
[   23.812390]  ? preempt_count_sub+0x50/0x80
[   23.812411]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.812435]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.812467]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   23.812490]  kthread+0x337/0x6f0
[   23.812508]  ? trace_preempt_on+0x20/0xc0
[   23.812529]  ? __pfx_kthread+0x10/0x10
[   23.812548]  ? _raw_spin_unlock_irq+0x47/0x80
[   23.812570]  ? calculate_sigpending+0x7b/0xa0
[   23.812592]  ? __pfx_kthread+0x10/0x10
[   23.812613]  ret_from_fork+0x116/0x1d0
[   23.812630]  ? __pfx_kthread+0x10/0x10
[   23.812649]  ret_from_fork_asm+0x1a/0x30
[   23.812678]  </TASK>
[   23.812688] 
[   23.820497] Allocated by task 288:
[   23.820639]  kasan_save_stack+0x45/0x70
[   23.820883]  kasan_save_track+0x18/0x40
[   23.821080]  kasan_save_alloc_info+0x3b/0x50
[   23.821302]  __kasan_kmalloc+0xb7/0xc0
[   23.821476]  __kmalloc_cache_noprof+0x189/0x420
[   23.821622]  kasan_strings+0xc0/0xe80
[   23.821744]  kunit_try_run_case+0x1a5/0x480
[   23.821887]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.822137]  kthread+0x337/0x6f0
[   23.822302]  ret_from_fork+0x116/0x1d0
[   23.822485]  ret_from_fork_asm+0x1a/0x30
[   23.822765] 
[   23.822900] Freed by task 288:
[   23.823065]  kasan_save_stack+0x45/0x70
[   23.823266]  kasan_save_track+0x18/0x40
[   23.823688]  kasan_save_free_info+0x3f/0x60
[   23.823916]  __kasan_slab_free+0x56/0x70
[   23.824075]  kfree+0x222/0x3f0
[   23.824224]  kasan_strings+0x2aa/0xe80
[   23.824433]  kunit_try_run_case+0x1a5/0x480
[   23.824615]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.824836]  kthread+0x337/0x6f0
[   23.824996]  ret_from_fork+0x116/0x1d0
[   23.825120]  ret_from_fork_asm+0x1a/0x30
[   23.825250] 
[   23.825313] The buggy address belongs to the object at ffff888102596f80
[   23.825313]  which belongs to the cache kmalloc-32 of size 32
[   23.825776] The buggy address is located 16 bytes inside of
[   23.825776]  freed 32-byte region [ffff888102596f80, ffff888102596fa0)
[   23.826227] 
[   23.826293] The buggy address belongs to the physical page:
[   23.826456] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102596
[   23.826902] flags: 0x200000000000000(node=0|zone=2)
[   23.827258] page_type: f5(slab)
[   23.827422] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   23.827751] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000
[   23.828108] page dumped because: kasan: bad access detected
[   23.828275] 
[   23.828340] Memory state around the buggy address:
[   23.828489]  ffff888102596e80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   23.828990]  ffff888102596f00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   23.829307] >ffff888102596f80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   23.829621]                          ^
[   23.829956]  ffff888102597000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   23.830252]  ffff888102597080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   23.830764] ==================================================================