[   31.765530] ==================================================================
[   31.765907] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   31.766509] Read of size 1 at addr ffff888103b4da50 by task kunit_try_catch/289
[   31.767111] 
[   31.767288] CPU: 1 UID: 0 PID: 289 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250624 #1 PREEMPT(voluntary) 
[   31.767403] Tainted: [B]=BAD_PAGE, [N]=TEST
[   31.767432] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   31.767480] Call Trace:
[   31.767524]  <TASK>
[   31.767671]  dump_stack_lvl+0x73/0xb0
[   31.767761]  print_report+0xd1/0x650
[   31.767836]  ? __virt_addr_valid+0x1db/0x2d0
[   31.767894]  ? strnlen+0x73/0x80
[   31.767943]  ? kasan_complete_mode_report_info+0x64/0x200
[   31.768012]  ? strnlen+0x73/0x80
[   31.768064]  kasan_report+0x141/0x180
[   31.768207]  ? strnlen+0x73/0x80
[   31.768311]  __asan_report_load1_noabort+0x18/0x20
[   31.768401]  strnlen+0x73/0x80
[   31.768474]  kasan_strings+0x615/0xe80
[   31.768560]  ? trace_hardirqs_on+0x37/0xe0
[   31.768626]  ? __pfx_kasan_strings+0x10/0x10
[   31.768673]  ? finish_task_switch.isra.0+0x153/0x700
[   31.768727]  ? __switch_to+0x47/0xf50
[   31.768793]  ? __schedule+0x10cc/0x2b60
[   31.768859]  ? __pfx_read_tsc+0x10/0x10
[   31.768916]  ? ktime_get_ts64+0x86/0x230
[   31.768972]  kunit_try_run_case+0x1a5/0x480
[   31.769037]  ? __pfx_kunit_try_run_case+0x10/0x10
[   31.769196]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   31.769300]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   31.769368]  ? __kthread_parkme+0x82/0x180
[   31.769433]  ? preempt_count_sub+0x50/0x80
[   31.769470]  ? __pfx_kunit_try_run_case+0x10/0x10
[   31.769506]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   31.769558]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   31.769592]  kthread+0x337/0x6f0
[   31.769619]  ? trace_preempt_on+0x20/0xc0
[   31.769665]  ? __pfx_kthread+0x10/0x10
[   31.769693]  ? _raw_spin_unlock_irq+0x47/0x80
[   31.769724]  ? calculate_sigpending+0x7b/0xa0
[   31.769757]  ? __pfx_kthread+0x10/0x10
[   31.769786]  ret_from_fork+0x116/0x1d0
[   31.769812]  ? __pfx_kthread+0x10/0x10
[   31.769839]  ret_from_fork_asm+0x1a/0x30
[   31.769877]  </TASK>
[   31.769892] 
[   31.785820] Allocated by task 289:
[   31.786351]  kasan_save_stack+0x45/0x70
[   31.786836]  kasan_save_track+0x18/0x40
[   31.787404]  kasan_save_alloc_info+0x3b/0x50
[   31.787887]  __kasan_kmalloc+0xb7/0xc0
[   31.788327]  __kmalloc_cache_noprof+0x189/0x420
[   31.788870]  kasan_strings+0xc0/0xe80
[   31.789307]  kunit_try_run_case+0x1a5/0x480
[   31.789820]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   31.790177]  kthread+0x337/0x6f0
[   31.790530]  ret_from_fork+0x116/0x1d0
[   31.791565]  ret_from_fork_asm+0x1a/0x30
[   31.792012] 
[   31.792356] Freed by task 289:
[   31.792654]  kasan_save_stack+0x45/0x70
[   31.793188]  kasan_save_track+0x18/0x40
[   31.793562]  kasan_save_free_info+0x3f/0x60
[   31.794034]  __kasan_slab_free+0x56/0x70
[   31.794555]  kfree+0x222/0x3f0
[   31.794949]  kasan_strings+0x2aa/0xe80
[   31.795418]  kunit_try_run_case+0x1a5/0x480
[   31.795885]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   31.796292]  kthread+0x337/0x6f0
[   31.797141]  ret_from_fork+0x116/0x1d0
[   31.797578]  ret_from_fork_asm+0x1a/0x30
[   31.797913] 
[   31.798252] The buggy address belongs to the object at ffff888103b4da40
[   31.798252]  which belongs to the cache kmalloc-32 of size 32
[   31.799252] The buggy address is located 16 bytes inside of
[   31.799252]  freed 32-byte region [ffff888103b4da40, ffff888103b4da60)
[   31.800596] 
[   31.800720] The buggy address belongs to the physical page:
[   31.801191] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103b4d
[   31.801762] flags: 0x200000000000000(node=0|zone=2)
[   31.802402] page_type: f5(slab)
[   31.802791] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   31.803574] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   31.804207] page dumped because: kasan: bad access detected
[   31.804792] 
[   31.805175] Memory state around the buggy address:
[   31.805558]  ffff888103b4d900: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.805921]  ffff888103b4d980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.806233] >ffff888103b4da00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.806875]                                                  ^
[   31.807643]  ffff888103b4da80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.808465]  ffff888103b4db00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.809199] ==================================================================