[   15.908353] ==================================================================
[   15.908915] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0
[   15.909278] Read of size 1 at addr ffff8881039f3390 by task kunit_try_catch/279
[   15.909825] 
[   15.909925] CPU: 1 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G    B            N  6.15.2-rc1 #1 PREEMPT(voluntary) 
[   15.909990] Tainted: [B]=BAD_PAGE, [N]=TEST
[   15.910005] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   15.910030] Call Trace:
[   15.910056]  <TASK>
[   15.910080]  dump_stack_lvl+0x73/0xb0
[   15.910115]  print_report+0xd1/0x650
[   15.910141]  ? __virt_addr_valid+0x1db/0x2d0
[   15.910165]  ? strlen+0x8f/0xb0
[   15.910183]  ? kasan_complete_mode_report_info+0x64/0x200
[   15.910208]  ? strlen+0x8f/0xb0
[   15.910227]  kasan_report+0x141/0x180
[   15.910251]  ? strlen+0x8f/0xb0
[   15.910274]  __asan_report_load1_noabort+0x18/0x20
[   15.910296]  strlen+0x8f/0xb0
[   15.910316]  kasan_strings+0x57b/0xe80
[   15.910338]  ? trace_hardirqs_on+0x37/0xe0
[   15.910363]  ? __pfx_kasan_strings+0x10/0x10
[   15.910386]  ? finish_task_switch.isra.0+0x153/0x700
[   15.910410]  ? __switch_to+0x5d9/0xf60
[   15.910431]  ? dequeue_task_fair+0x166/0x4e0
[   15.910456]  ? __schedule+0x10cc/0x2b30
[   15.910479]  ? __pfx_read_tsc+0x10/0x10
[   15.910499]  ? ktime_get_ts64+0x86/0x230
[   15.910526]  kunit_try_run_case+0x1a5/0x480
[   15.910556]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.910600]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   15.910627]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   15.910650]  ? __kthread_parkme+0x82/0x180
[   15.910673]  ? preempt_count_sub+0x50/0x80
[   15.910698]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.910722]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.910747]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   15.910770]  kthread+0x337/0x6f0
[   15.910788]  ? trace_preempt_on+0x20/0xc0
[   15.910812]  ? __pfx_kthread+0x10/0x10
[   15.910832]  ? _raw_spin_unlock_irq+0x47/0x80
[   15.910854]  ? calculate_sigpending+0x7b/0xa0
[   15.910877]  ? __pfx_kthread+0x10/0x10
[   15.910897]  ret_from_fork+0x41/0x80
[   15.910918]  ? __pfx_kthread+0x10/0x10
[   15.910938]  ret_from_fork_asm+0x1a/0x30
[   15.910970]  </TASK>
[   15.910983] 
[   15.920429] Allocated by task 279:
[   15.920705]  kasan_save_stack+0x45/0x70
[   15.920951]  kasan_save_track+0x18/0x40
[   15.921266]  kasan_save_alloc_info+0x3b/0x50
[   15.921578]  __kasan_kmalloc+0xb7/0xc0
[   15.922146]  __kmalloc_cache_noprof+0x189/0x420
[   15.922551]  kasan_strings+0xc0/0xe80
[   15.922796]  kunit_try_run_case+0x1a5/0x480
[   15.923049]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.923340]  kthread+0x337/0x6f0
[   15.923536]  ret_from_fork+0x41/0x80
[   15.923872]  ret_from_fork_asm+0x1a/0x30
[   15.924156] 
[   15.924255] Freed by task 279:
[   15.924420]  kasan_save_stack+0x45/0x70
[   15.924649]  kasan_save_track+0x18/0x40
[   15.924928]  kasan_save_free_info+0x3f/0x60
[   15.925048]  __kasan_slab_free+0x56/0x70
[   15.925255]  kfree+0x222/0x3f0
[   15.925473]  kasan_strings+0x2aa/0xe80
[   15.925675]  kunit_try_run_case+0x1a5/0x480
[   15.925884]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.926070]  kthread+0x337/0x6f0
[   15.926295]  ret_from_fork+0x41/0x80
[   15.926446]  ret_from_fork_asm+0x1a/0x30
[   15.926668] 
[   15.926869] The buggy address belongs to the object at ffff8881039f3380
[   15.926869]  which belongs to the cache kmalloc-32 of size 32
[   15.927206] The buggy address is located 16 bytes inside of
[   15.927206]  freed 32-byte region [ffff8881039f3380, ffff8881039f33a0)
[   15.927635] 
[   15.928118] The buggy address belongs to the physical page:
[   15.928252] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039f3
[   15.928406] flags: 0x200000000000000(node=0|zone=2)
[   15.928519] page_type: f5(slab)
[   15.928874] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   15.929423] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   15.929757] page dumped because: kasan: bad access detected
[   15.929970] 
[   15.930109] Memory state around the buggy address:
[   15.930311]  ffff8881039f3280: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   15.930445]  ffff8881039f3300: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   15.931024] >ffff8881039f3380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   15.931288]                          ^
[   15.931452]  ffff8881039f3400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   15.931637]  ffff8881039f3480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   15.932039] ==================================================================