[   27.132879] ==================================================================
[   27.133188] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   27.133460] Read of size 1 at addr ffff8881060c6b10 by task kunit_try_catch/307
[   27.133784] 
[   27.133888] CPU: 1 UID: 0 PID: 307 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5-next-20250710 #1 PREEMPT(voluntary) 
[   27.133938] Tainted: [B]=BAD_PAGE, [N]=TEST
[   27.133951] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   27.133973] Call Trace:
[   27.133988]  <TASK>
[   27.134003]  dump_stack_lvl+0x73/0xb0
[   27.134030]  print_report+0xd1/0x610
[   27.134054]  ? __virt_addr_valid+0x1db/0x2d0
[   27.134079]  ? strnlen+0x73/0x80
[   27.134101]  ? kasan_complete_mode_report_info+0x64/0x200
[   27.134127]  ? strnlen+0x73/0x80
[   27.134149]  kasan_report+0x141/0x180
[   27.134172]  ? strnlen+0x73/0x80
[   27.134198]  __asan_report_load1_noabort+0x18/0x20
[   27.134223]  strnlen+0x73/0x80
[   27.134246]  kasan_strings+0x615/0xe80
[   27.134266]  ? trace_hardirqs_on+0x37/0xe0
[   27.134288]  ? __pfx_kasan_strings+0x10/0x10
[   27.134308]  ? finish_task_switch.isra.0+0x153/0x700
[   27.134331]  ? __switch_to+0x47/0xf80
[   27.134357]  ? __schedule+0x10cc/0x2b60
[   27.134380]  ? __pfx_read_tsc+0x10/0x10
[   27.134401]  ? ktime_get_ts64+0x86/0x230
[   27.134424]  kunit_try_run_case+0x1a5/0x480
[   27.134447]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.134467]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   27.134516]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   27.134541]  ? __kthread_parkme+0x82/0x180
[   27.134561]  ? preempt_count_sub+0x50/0x80
[   27.134607]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.134630]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.134654]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   27.134679]  kthread+0x337/0x6f0
[   27.134710]  ? trace_preempt_on+0x20/0xc0
[   27.134731]  ? __pfx_kthread+0x10/0x10
[   27.134752]  ? _raw_spin_unlock_irq+0x47/0x80
[   27.134790]  ? calculate_sigpending+0x7b/0xa0
[   27.134814]  ? __pfx_kthread+0x10/0x10
[   27.134835]  ret_from_fork+0x116/0x1d0
[   27.134854]  ? __pfx_kthread+0x10/0x10
[   27.134874]  ret_from_fork_asm+0x1a/0x30
[   27.134905]  </TASK>
[   27.134916] 
[   27.142534] Allocated by task 307:
[   27.142730]  kasan_save_stack+0x45/0x70
[   27.142985]  kasan_save_track+0x18/0x40
[   27.143178]  kasan_save_alloc_info+0x3b/0x50
[   27.143354]  __kasan_kmalloc+0xb7/0xc0
[   27.143502]  __kmalloc_cache_noprof+0x189/0x420
[   27.143733]  kasan_strings+0xc0/0xe80
[   27.143983]  kunit_try_run_case+0x1a5/0x480
[   27.144160]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.144401]  kthread+0x337/0x6f0
[   27.144579]  ret_from_fork+0x116/0x1d0
[   27.144849]  ret_from_fork_asm+0x1a/0x30
[   27.145060] 
[   27.145141] Freed by task 307:
[   27.145265]  kasan_save_stack+0x45/0x70
[   27.145427]  kasan_save_track+0x18/0x40
[   27.145636]  kasan_save_free_info+0x3f/0x60
[   27.145972]  __kasan_slab_free+0x56/0x70
[   27.146135]  kfree+0x222/0x3f0
[   27.146251]  kasan_strings+0x2aa/0xe80
[   27.146380]  kunit_try_run_case+0x1a5/0x480
[   27.146520]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.146728]  kthread+0x337/0x6f0
[   27.146970]  ret_from_fork+0x116/0x1d0
[   27.147164]  ret_from_fork_asm+0x1a/0x30
[   27.147356] 
[   27.147444] The buggy address belongs to the object at ffff8881060c6b00
[   27.147444]  which belongs to the cache kmalloc-32 of size 32
[   27.148059] The buggy address is located 16 bytes inside of
[   27.148059]  freed 32-byte region [ffff8881060c6b00, ffff8881060c6b20)
[   27.148440] 
[   27.148506] The buggy address belongs to the physical page:
[   27.148693] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1060c6
[   27.149155] flags: 0x200000000000000(node=0|zone=2)
[   27.149395] page_type: f5(slab)
[   27.149592] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   27.150137] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   27.150450] page dumped because: kasan: bad access detected
[   27.150733] 
[   27.150892] Memory state around the buggy address:
[   27.151091]  ffff8881060c6a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.151374]  ffff8881060c6a80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.151687] >ffff8881060c6b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.152056]                          ^
[   27.152223]  ffff8881060c6b80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.152469]  ffff8881060c6c00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.152877] ==================================================================