[   27.142037] ==================================================================
[   27.142631] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   27.143206] Read of size 1 at addr ffff888105abca90 by task kunit_try_catch/308
[   27.143965] 
[   27.144377] CPU: 0 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4-next-20250704 #1 PREEMPT(voluntary) 
[   27.144471] Tainted: [B]=BAD_PAGE, [N]=TEST
[   27.144528] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   27.144557] Call Trace:
[   27.144579]  <TASK>
[   27.144604]  dump_stack_lvl+0x73/0xb0
[   27.144640]  print_report+0xd1/0x650
[   27.144667]  ? __virt_addr_valid+0x1db/0x2d0
[   27.144694]  ? strnlen+0x73/0x80
[   27.144717]  ? kasan_complete_mode_report_info+0x64/0x200
[   27.144746]  ? strnlen+0x73/0x80
[   27.144768]  kasan_report+0x141/0x180
[   27.144793]  ? strnlen+0x73/0x80
[   27.144819]  __asan_report_load1_noabort+0x18/0x20
[   27.144846]  strnlen+0x73/0x80
[   27.144893]  kasan_strings+0x615/0xe80
[   27.144916]  ? trace_hardirqs_on+0x37/0xe0
[   27.144943]  ? __pfx_kasan_strings+0x10/0x10
[   27.144965]  ? finish_task_switch.isra.0+0x153/0x700
[   27.144991]  ? __switch_to+0x47/0xf50
[   27.145019]  ? __schedule+0x10cc/0x2b60
[   27.145045]  ? __pfx_read_tsc+0x10/0x10
[   27.145070]  ? ktime_get_ts64+0x86/0x230
[   27.145097]  kunit_try_run_case+0x1a5/0x480
[   27.145126]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.145160]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   27.145186]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   27.145213]  ? __kthread_parkme+0x82/0x180
[   27.145237]  ? preempt_count_sub+0x50/0x80
[   27.145261]  ? __pfx_kunit_try_run_case+0x10/0x10
[   27.145289]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.145317]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   27.145344]  kthread+0x337/0x6f0
[   27.145367]  ? trace_preempt_on+0x20/0xc0
[   27.145402]  ? __pfx_kthread+0x10/0x10
[   27.145493]  ? _raw_spin_unlock_irq+0x47/0x80
[   27.145524]  ? calculate_sigpending+0x7b/0xa0
[   27.145552]  ? __pfx_kthread+0x10/0x10
[   27.145576]  ret_from_fork+0x116/0x1d0
[   27.145599]  ? __pfx_kthread+0x10/0x10
[   27.145621]  ret_from_fork_asm+0x1a/0x30
[   27.145658]  </TASK>
[   27.145671] 
[   27.159499] Allocated by task 308:
[   27.160152]  kasan_save_stack+0x45/0x70
[   27.160625]  kasan_save_track+0x18/0x40
[   27.161243]  kasan_save_alloc_info+0x3b/0x50
[   27.161570]  __kasan_kmalloc+0xb7/0xc0
[   27.161980]  __kmalloc_cache_noprof+0x189/0x420
[   27.162641]  kasan_strings+0xc0/0xe80
[   27.162931]  kunit_try_run_case+0x1a5/0x480
[   27.163414]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.164084]  kthread+0x337/0x6f0
[   27.164568]  ret_from_fork+0x116/0x1d0
[   27.165086]  ret_from_fork_asm+0x1a/0x30
[   27.165534] 
[   27.165781] Freed by task 308:
[   27.166057]  kasan_save_stack+0x45/0x70
[   27.166380]  kasan_save_track+0x18/0x40
[   27.166596]  kasan_save_free_info+0x3f/0x60
[   27.166805]  __kasan_slab_free+0x56/0x70
[   27.167457]  kfree+0x222/0x3f0
[   27.167836]  kasan_strings+0x2aa/0xe80
[   27.168338]  kunit_try_run_case+0x1a5/0x480
[   27.168669]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   27.169319]  kthread+0x337/0x6f0
[   27.169674]  ret_from_fork+0x116/0x1d0
[   27.170155]  ret_from_fork_asm+0x1a/0x30
[   27.170602] 
[   27.170860] The buggy address belongs to the object at ffff888105abca80
[   27.170860]  which belongs to the cache kmalloc-32 of size 32
[   27.171805] The buggy address is located 16 bytes inside of
[   27.171805]  freed 32-byte region [ffff888105abca80, ffff888105abcaa0)
[   27.173169] 
[   27.173319] The buggy address belongs to the physical page:
[   27.173614] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105abc
[   27.174291] flags: 0x200000000000000(node=0|zone=2)
[   27.174557] page_type: f5(slab)
[   27.174727] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   27.175495] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   27.176251] page dumped because: kasan: bad access detected
[   27.176699] 
[   27.176807] Memory state around the buggy address:
[   27.177521]  ffff888105abc980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.178036]  ffff888105abca00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   27.178616] >ffff888105abca80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.179518]                          ^
[   27.179874]  ffff888105abcb00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   27.180728]  ffff888105abcb80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   27.181370] ==================================================================