[   14.283706] ==================================================================
[   14.284387] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   14.285067] Read of size 1 at addr ffff888102746ad0 by task kunit_try_catch/276
[   14.285593] 
[   14.285780] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6 #1 PREEMPT(voluntary) 
[   14.285823] Tainted: [B]=BAD_PAGE, [N]=TEST
[   14.285835] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   14.285855] Call Trace:
[   14.285879]  <TASK>
[   14.285894]  dump_stack_lvl+0x73/0xb0
[   14.285939]  print_report+0xd1/0x610
[   14.285962]  ? __virt_addr_valid+0x1db/0x2d0
[   14.285993]  ? strnlen+0x73/0x80
[   14.286011]  ? kasan_complete_mode_report_info+0x64/0x200
[   14.286034]  ? strnlen+0x73/0x80
[   14.286052]  kasan_report+0x141/0x180
[   14.286083]  ? strnlen+0x73/0x80
[   14.286105]  __asan_report_load1_noabort+0x18/0x20
[   14.286128]  strnlen+0x73/0x80
[   14.286147]  kasan_strings+0x615/0xe80
[   14.286167]  ? trace_hardirqs_on+0x37/0xe0
[   14.286189]  ? __pfx_kasan_strings+0x10/0x10
[   14.286209]  ? finish_task_switch.isra.0+0x153/0x700
[   14.286230]  ? __switch_to+0x47/0xf50
[   14.286254]  ? __schedule+0x10cc/0x2b60
[   14.286274]  ? __pfx_read_tsc+0x10/0x10
[   14.286294]  ? ktime_get_ts64+0x86/0x230
[   14.286317]  kunit_try_run_case+0x1a5/0x480
[   14.286340]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.286372]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   14.286396]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   14.286418]  ? __kthread_parkme+0x82/0x180
[   14.286438]  ? preempt_count_sub+0x50/0x80
[   14.286461]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.286485]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.286508]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   14.286531]  kthread+0x337/0x6f0
[   14.286550]  ? trace_preempt_on+0x20/0xc0
[   14.286572]  ? __pfx_kthread+0x10/0x10
[   14.286592]  ? _raw_spin_unlock_irq+0x47/0x80
[   14.286612]  ? calculate_sigpending+0x7b/0xa0
[   14.286635]  ? __pfx_kthread+0x10/0x10
[   14.286656]  ret_from_fork+0x116/0x1d0
[   14.286674]  ? __pfx_kthread+0x10/0x10
[   14.286741]  ret_from_fork_asm+0x1a/0x30
[   14.286772]  </TASK>
[   14.286782] 
[   14.299221] Allocated by task 276:
[   14.299664]  kasan_save_stack+0x45/0x70
[   14.300198]  kasan_save_track+0x18/0x40
[   14.300606]  kasan_save_alloc_info+0x3b/0x50
[   14.301110]  __kasan_kmalloc+0xb7/0xc0
[   14.301547]  __kmalloc_cache_noprof+0x189/0x420
[   14.302116]  kasan_strings+0xc0/0xe80
[   14.302482]  kunit_try_run_case+0x1a5/0x480
[   14.302882]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.303248]  kthread+0x337/0x6f0
[   14.303376]  ret_from_fork+0x116/0x1d0
[   14.303707]  ret_from_fork_asm+0x1a/0x30
[   14.304139] 
[   14.304296] Freed by task 276:
[   14.304707]  kasan_save_stack+0x45/0x70
[   14.305061]  kasan_save_track+0x18/0x40
[   14.305198]  kasan_save_free_info+0x3f/0x60
[   14.305346]  __kasan_slab_free+0x56/0x70
[   14.305801]  kfree+0x222/0x3f0
[   14.306138]  kasan_strings+0x2aa/0xe80
[   14.306602]  kunit_try_run_case+0x1a5/0x480
[   14.307135]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.307877]  kthread+0x337/0x6f0
[   14.308049]  ret_from_fork+0x116/0x1d0
[   14.308185]  ret_from_fork_asm+0x1a/0x30
[   14.308325] 
[   14.308509] The buggy address belongs to the object at ffff888102746ac0
[   14.308509]  which belongs to the cache kmalloc-32 of size 32
[   14.309755] The buggy address is located 16 bytes inside of
[   14.309755]  freed 32-byte region [ffff888102746ac0, ffff888102746ae0)
[   14.310886] 
[   14.311076] The buggy address belongs to the physical page:
[   14.311638] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102746
[   14.312092] flags: 0x200000000000000(node=0|zone=2)
[   14.312647] page_type: f5(slab)
[   14.312972] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   14.313344] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   14.314287] page dumped because: kasan: bad access detected
[   14.314740] 
[   14.314814] Memory state around the buggy address:
[   14.314981]  ffff888102746980: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc
[   14.315202]  ffff888102746a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.315704] >ffff888102746a80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.316340]                                                  ^
[   14.316932]  ffff888102746b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.317587]  ffff888102746b80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   14.318215] ==================================================================