[   14.510567] ==================================================================
[   14.510926] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   14.511162] Read of size 1 at addr ffff8881038e8050 by task kunit_try_catch/276
[   14.511697] 
[   14.511834] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6 #1 PREEMPT(voluntary) 
[   14.511878] Tainted: [B]=BAD_PAGE, [N]=TEST
[   14.511890] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   14.511911] Call Trace:
[   14.511924]  <TASK>
[   14.511940]  dump_stack_lvl+0x73/0xb0
[   14.511970]  print_report+0xd1/0x610
[   14.511992]  ? __virt_addr_valid+0x1db/0x2d0
[   14.512014]  ? strnlen+0x73/0x80
[   14.512032]  ? kasan_complete_mode_report_info+0x64/0x200
[   14.512055]  ? strnlen+0x73/0x80
[   14.512074]  kasan_report+0x141/0x180
[   14.512096]  ? strnlen+0x73/0x80
[   14.512118]  __asan_report_load1_noabort+0x18/0x20
[   14.512144]  strnlen+0x73/0x80
[   14.512164]  kasan_strings+0x615/0xe80
[   14.512185]  ? trace_hardirqs_on+0x37/0xe0
[   14.512210]  ? __pfx_kasan_strings+0x10/0x10
[   14.512231]  ? finish_task_switch.isra.0+0x153/0x700
[   14.512254]  ? __switch_to+0x47/0xf50
[   14.512279]  ? __schedule+0x10cc/0x2b60
[   14.512300]  ? __pfx_read_tsc+0x10/0x10
[   14.512321]  ? ktime_get_ts64+0x86/0x230
[   14.512347]  kunit_try_run_case+0x1a5/0x480
[   14.512372]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.512396]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   14.512421]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   14.512446]  ? __kthread_parkme+0x82/0x180
[   14.512467]  ? preempt_count_sub+0x50/0x80
[   14.512491]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.512516]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.512541]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   14.512567]  kthread+0x337/0x6f0
[   14.512587]  ? trace_preempt_on+0x20/0xc0
[   14.512610]  ? __pfx_kthread+0x10/0x10
[   14.512631]  ? _raw_spin_unlock_irq+0x47/0x80
[   14.512716]  ? calculate_sigpending+0x7b/0xa0
[   14.512746]  ? __pfx_kthread+0x10/0x10
[   14.512780]  ret_from_fork+0x116/0x1d0
[   14.512799]  ? __pfx_kthread+0x10/0x10
[   14.512819]  ret_from_fork_asm+0x1a/0x30
[   14.512850]  </TASK>
[   14.512859] 
[   14.520853] Allocated by task 276:
[   14.521008]  kasan_save_stack+0x45/0x70
[   14.521155]  kasan_save_track+0x18/0x40
[   14.521291]  kasan_save_alloc_info+0x3b/0x50
[   14.521502]  __kasan_kmalloc+0xb7/0xc0
[   14.521692]  __kmalloc_cache_noprof+0x189/0x420
[   14.521938]  kasan_strings+0xc0/0xe80
[   14.522210]  kunit_try_run_case+0x1a5/0x480
[   14.522498]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.522707]  kthread+0x337/0x6f0
[   14.522883]  ret_from_fork+0x116/0x1d0
[   14.523076]  ret_from_fork_asm+0x1a/0x30
[   14.523237] 
[   14.523318] Freed by task 276:
[   14.523650]  kasan_save_stack+0x45/0x70
[   14.523870]  kasan_save_track+0x18/0x40
[   14.524038]  kasan_save_free_info+0x3f/0x60
[   14.524239]  __kasan_slab_free+0x56/0x70
[   14.524501]  kfree+0x222/0x3f0
[   14.524623]  kasan_strings+0x2aa/0xe80
[   14.524767]  kunit_try_run_case+0x1a5/0x480
[   14.524915]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.525161]  kthread+0x337/0x6f0
[   14.525327]  ret_from_fork+0x116/0x1d0
[   14.525605]  ret_from_fork_asm+0x1a/0x30
[   14.525923] 
[   14.526023] The buggy address belongs to the object at ffff8881038e8040
[   14.526023]  which belongs to the cache kmalloc-32 of size 32
[   14.526643] The buggy address is located 16 bytes inside of
[   14.526643]  freed 32-byte region [ffff8881038e8040, ffff8881038e8060)
[   14.527105] 
[   14.527179] The buggy address belongs to the physical page:
[   14.527352] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e8
[   14.527834] flags: 0x200000000000000(node=0|zone=2)
[   14.528032] page_type: f5(slab)
[   14.528153] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   14.528388] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   14.528617] page dumped because: kasan: bad access detected
[   14.528815] 
[   14.528913] Memory state around the buggy address:
[   14.529138]  ffff8881038e7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.529453]  ffff8881038e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   14.529907] >ffff8881038e8000: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   14.530217]                                                  ^
[   14.530402]  ffff8881038e8080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.530617]  ffff8881038e8100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.530842] ==================================================================