[   14.503786] ==================================================================
[   14.504297] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   14.504716] Read of size 1 at addr ffff88810267d890 by task kunit_try_catch/277
[   14.505383] 
[   14.505668] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   14.505727] Tainted: [B]=BAD_PAGE, [N]=TEST
[   14.505738] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   14.505761] Call Trace:
[   14.505780]  <TASK>
[   14.505835]  dump_stack_lvl+0x73/0xb0
[   14.505870]  print_report+0xd1/0x650
[   14.505894]  ? __virt_addr_valid+0x1db/0x2d0
[   14.505986]  ? strnlen+0x73/0x80
[   14.506005]  ? kasan_complete_mode_report_info+0x64/0x200
[   14.506031]  ? strnlen+0x73/0x80
[   14.506048]  kasan_report+0x141/0x180
[   14.506070]  ? strnlen+0x73/0x80
[   14.506092]  __asan_report_load1_noabort+0x18/0x20
[   14.506118]  strnlen+0x73/0x80
[   14.506136]  kasan_strings+0x615/0xe80
[   14.506156]  ? trace_hardirqs_on+0x37/0xe0
[   14.506180]  ? __pfx_kasan_strings+0x10/0x10
[   14.506201]  ? finish_task_switch.isra.0+0x153/0x700
[   14.506225]  ? __switch_to+0x47/0xf50
[   14.506251]  ? __schedule+0x10cc/0x2b60
[   14.506273]  ? __pfx_read_tsc+0x10/0x10
[   14.506293]  ? ktime_get_ts64+0x86/0x230
[   14.506319]  kunit_try_run_case+0x1a5/0x480
[   14.506343]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.506367]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   14.506392]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   14.506416]  ? __kthread_parkme+0x82/0x180
[   14.506438]  ? preempt_count_sub+0x50/0x80
[   14.506461]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.506504]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.506530]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   14.506555]  kthread+0x337/0x6f0
[   14.506574]  ? trace_preempt_on+0x20/0xc0
[   14.506597]  ? __pfx_kthread+0x10/0x10
[   14.506626]  ? _raw_spin_unlock_irq+0x47/0x80
[   14.506663]  ? calculate_sigpending+0x7b/0xa0
[   14.506687]  ? __pfx_kthread+0x10/0x10
[   14.506709]  ret_from_fork+0x116/0x1d0
[   14.506728]  ? __pfx_kthread+0x10/0x10
[   14.506747]  ret_from_fork_asm+0x1a/0x30
[   14.506779]  </TASK>
[   14.506789] 
[   14.519433] Allocated by task 277:
[   14.519671]  kasan_save_stack+0x45/0x70
[   14.519828]  kasan_save_track+0x18/0x40
[   14.520140]  kasan_save_alloc_info+0x3b/0x50
[   14.520365]  __kasan_kmalloc+0xb7/0xc0
[   14.520521]  __kmalloc_cache_noprof+0x189/0x420
[   14.520760]  kasan_strings+0xc0/0xe80
[   14.520981]  kunit_try_run_case+0x1a5/0x480
[   14.521167]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.521404]  kthread+0x337/0x6f0
[   14.521579]  ret_from_fork+0x116/0x1d0
[   14.521731]  ret_from_fork_asm+0x1a/0x30
[   14.521908] 
[   14.522003] Freed by task 277:
[   14.522184]  kasan_save_stack+0x45/0x70
[   14.522335]  kasan_save_track+0x18/0x40
[   14.522468]  kasan_save_free_info+0x3f/0x60
[   14.522940]  __kasan_slab_free+0x56/0x70
[   14.523143]  kfree+0x222/0x3f0
[   14.523362]  kasan_strings+0x2aa/0xe80
[   14.523538]  kunit_try_run_case+0x1a5/0x480
[   14.523702]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.524178]  kthread+0x337/0x6f0
[   14.524358]  ret_from_fork+0x116/0x1d0
[   14.524529]  ret_from_fork_asm+0x1a/0x30
[   14.524684] 
[   14.524758] The buggy address belongs to the object at ffff88810267d880
[   14.524758]  which belongs to the cache kmalloc-32 of size 32
[   14.525545] The buggy address is located 16 bytes inside of
[   14.525545]  freed 32-byte region [ffff88810267d880, ffff88810267d8a0)
[   14.525919] 
[   14.526129] The buggy address belongs to the physical page:
[   14.526385] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10267d
[   14.526798] flags: 0x200000000000000(node=0|zone=2)
[   14.527088] page_type: f5(slab)
[   14.527212] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   14.527455] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   14.528132] page dumped because: kasan: bad access detected
[   14.528357] 
[   14.528505] Memory state around the buggy address:
[   14.528675]  ffff88810267d780: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   14.529365]  ffff88810267d800: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   14.529733] >ffff88810267d880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.529961]                          ^
[   14.530114]  ffff88810267d900: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   14.530448]  ffff88810267d980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.530889] ==================================================================