[   23.923610] ==================================================================
[   23.924545] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   23.925083] Read of size 1 at addr ffff8881023cba90 by task kunit_try_catch/288
[   23.925652] 
[   23.925853] CPU: 0 UID: 0 PID: 288 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250623 #1 PREEMPT(voluntary) 
[   23.925942] Tainted: [B]=BAD_PAGE, [N]=TEST
[   23.925965] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   23.926023] Call Trace:
[   23.926051]  <TASK>
[   23.926079]  dump_stack_lvl+0x73/0xb0
[   23.926132]  print_report+0xd1/0x650
[   23.926172]  ? __virt_addr_valid+0x1db/0x2d0
[   23.926311]  ? strnlen+0x73/0x80
[   23.926351]  ? kasan_complete_mode_report_info+0x64/0x200
[   23.926413]  ? strnlen+0x73/0x80
[   23.926514]  kasan_report+0x141/0x180
[   23.926561]  ? strnlen+0x73/0x80
[   23.926611]  __asan_report_load1_noabort+0x18/0x20
[   23.926654]  strnlen+0x73/0x80
[   23.926707]  kasan_strings+0x615/0xe80
[   23.926758]  ? trace_hardirqs_on+0x37/0xe0
[   23.926801]  ? __pfx_kasan_strings+0x10/0x10
[   23.926837]  ? finish_task_switch.isra.0+0x153/0x700
[   23.926874]  ? __switch_to+0x47/0xf50
[   23.926926]  ? __schedule+0x10cc/0x2b60
[   23.926969]  ? __pfx_read_tsc+0x10/0x10
[   23.927025]  ? ktime_get_ts64+0x86/0x230
[   23.927070]  kunit_try_run_case+0x1a5/0x480
[   23.927232]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.927285]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   23.927326]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   23.927362]  ? __kthread_parkme+0x82/0x180
[   23.927414]  ? preempt_count_sub+0x50/0x80
[   23.927466]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.927507]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.927544]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   23.927582]  kthread+0x337/0x6f0
[   23.927614]  ? trace_preempt_on+0x20/0xc0
[   23.927659]  ? __pfx_kthread+0x10/0x10
[   23.927695]  ? _raw_spin_unlock_irq+0x47/0x80
[   23.927747]  ? calculate_sigpending+0x7b/0xa0
[   23.927789]  ? __pfx_kthread+0x10/0x10
[   23.927826]  ret_from_fork+0x116/0x1d0
[   23.927854]  ? __pfx_kthread+0x10/0x10
[   23.927895]  ret_from_fork_asm+0x1a/0x30
[   23.927959]  </TASK>
[   23.927982] 
[   23.939479] Allocated by task 288:
[   23.939694]  kasan_save_stack+0x45/0x70
[   23.939978]  kasan_save_track+0x18/0x40
[   23.940217]  kasan_save_alloc_info+0x3b/0x50
[   23.940395]  __kasan_kmalloc+0xb7/0xc0
[   23.940672]  __kmalloc_cache_noprof+0x189/0x420
[   23.940997]  kasan_strings+0xc0/0xe80
[   23.941282]  kunit_try_run_case+0x1a5/0x480
[   23.941541]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.941830]  kthread+0x337/0x6f0
[   23.941970]  ret_from_fork+0x116/0x1d0
[   23.942127]  ret_from_fork_asm+0x1a/0x30
[   23.942420] 
[   23.942580] Freed by task 288:
[   23.942825]  kasan_save_stack+0x45/0x70
[   23.943205]  kasan_save_track+0x18/0x40
[   23.943406]  kasan_save_free_info+0x3f/0x60
[   23.943566]  __kasan_slab_free+0x56/0x70
[   23.943713]  kfree+0x222/0x3f0
[   23.943927]  kasan_strings+0x2aa/0xe80
[   23.944304]  kunit_try_run_case+0x1a5/0x480
[   23.944630]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.945063]  kthread+0x337/0x6f0
[   23.945218]  ret_from_fork+0x116/0x1d0
[   23.945364]  ret_from_fork_asm+0x1a/0x30
[   23.945526] 
[   23.945611] The buggy address belongs to the object at ffff8881023cba80
[   23.945611]  which belongs to the cache kmalloc-32 of size 32
[   23.945933] The buggy address is located 16 bytes inside of
[   23.945933]  freed 32-byte region [ffff8881023cba80, ffff8881023cbaa0)
[   23.946730] 
[   23.946943] The buggy address belongs to the physical page:
[   23.947321] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1023cb
[   23.947651] flags: 0x200000000000000(node=0|zone=2)
[   23.947829] page_type: f5(slab)
[   23.948059] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   23.948569] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   23.948959] page dumped because: kasan: bad access detected
[   23.949273] 
[   23.949360] Memory state around the buggy address:
[   23.949536]  ffff8881023cb980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   23.949885]  ffff8881023cba00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   23.950426] >ffff8881023cba80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   23.950963]                          ^
[   23.951120]  ffff8881023cbb00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   23.951524]  ffff8881023cbb80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   23.951863] ==================================================================