[   15.878361] ==================================================================
[   15.878709] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80
[   15.879026] Read of size 1 at addr ffff8881039f3390 by task kunit_try_catch/279
[   15.879659] 
[   15.879803] CPU: 1 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G    B            N  6.15.2-rc1 #1 PREEMPT(voluntary) 
[   15.879877] Tainted: [B]=BAD_PAGE, [N]=TEST
[   15.879894] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   15.879918] Call Trace:
[   15.879943]  <TASK>
[   15.879965]  dump_stack_lvl+0x73/0xb0
[   15.879999]  print_report+0xd1/0x650
[   15.880023]  ? __virt_addr_valid+0x1db/0x2d0
[   15.880045]  ? kasan_strings+0xcbc/0xe80
[   15.880066]  ? kasan_complete_mode_report_info+0x64/0x200
[   15.880088]  ? kasan_strings+0xcbc/0xe80
[   15.880108]  kasan_report+0x141/0x180
[   15.880130]  ? kasan_strings+0xcbc/0xe80
[   15.880155]  __asan_report_load1_noabort+0x18/0x20
[   15.880176]  kasan_strings+0xcbc/0xe80
[   15.880196]  ? trace_hardirqs_on+0x37/0xe0
[   15.880218]  ? __pfx_kasan_strings+0x10/0x10
[   15.880238]  ? finish_task_switch.isra.0+0x153/0x700
[   15.880261]  ? __switch_to+0x5d9/0xf60
[   15.880280]  ? dequeue_task_fair+0x166/0x4e0
[   15.880304]  ? __schedule+0x10cc/0x2b30
[   15.880325]  ? __pfx_read_tsc+0x10/0x10
[   15.880345]  ? ktime_get_ts64+0x86/0x230
[   15.880368]  kunit_try_run_case+0x1a5/0x480
[   15.880392]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.880412]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   15.880435]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   15.880457]  ? __kthread_parkme+0x82/0x180
[   15.880479]  ? preempt_count_sub+0x50/0x80
[   15.880502]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.880524]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.880547]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   15.880587]  kthread+0x337/0x6f0
[   15.880606]  ? trace_preempt_on+0x20/0xc0
[   15.880628]  ? __pfx_kthread+0x10/0x10
[   15.880650]  ? _raw_spin_unlock_irq+0x47/0x80
[   15.880671]  ? calculate_sigpending+0x7b/0xa0
[   15.880693]  ? __pfx_kthread+0x10/0x10
[   15.880712]  ret_from_fork+0x41/0x80
[   15.880731]  ? __pfx_kthread+0x10/0x10
[   15.880751]  ret_from_fork_asm+0x1a/0x30
[   15.880781]  </TASK>
[   15.880793] 
[   15.891917] Allocated by task 279:
[   15.892099]  kasan_save_stack+0x45/0x70
[   15.892222]  kasan_save_track+0x18/0x40
[   15.892766]  kasan_save_alloc_info+0x3b/0x50
[   15.893041]  __kasan_kmalloc+0xb7/0xc0
[   15.893151]  __kmalloc_cache_noprof+0x189/0x420
[   15.893460]  kasan_strings+0xc0/0xe80
[   15.893877]  kunit_try_run_case+0x1a5/0x480
[   15.893987]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.894101]  kthread+0x337/0x6f0
[   15.894182]  ret_from_fork+0x41/0x80
[   15.894271]  ret_from_fork_asm+0x1a/0x30
[   15.894361] 
[   15.894414] Freed by task 279:
[   15.894490]  kasan_save_stack+0x45/0x70
[   15.894593]  kasan_save_track+0x18/0x40
[   15.894775]  kasan_save_free_info+0x3f/0x60
[   15.894974]  __kasan_slab_free+0x56/0x70
[   15.896177]  kfree+0x222/0x3f0
[   15.896459]  kasan_strings+0x2aa/0xe80
[   15.896810]  kunit_try_run_case+0x1a5/0x480
[   15.897050]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.897300]  kthread+0x337/0x6f0
[   15.897448]  ret_from_fork+0x41/0x80
[   15.897637]  ret_from_fork_asm+0x1a/0x30
[   15.898204] 
[   15.898288] The buggy address belongs to the object at ffff8881039f3380
[   15.898288]  which belongs to the cache kmalloc-32 of size 32
[   15.899073] The buggy address is located 16 bytes inside of
[   15.899073]  freed 32-byte region [ffff8881039f3380, ffff8881039f33a0)
[   15.899798] 
[   15.899886] The buggy address belongs to the physical page:
[   15.900263] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039f3
[   15.900609] flags: 0x200000000000000(node=0|zone=2)
[   15.900837] page_type: f5(slab)
[   15.901160] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   15.901387] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   15.902334] page dumped because: kasan: bad access detected
[   15.902551] 
[   15.903070] Memory state around the buggy address:
[   15.903263]  ffff8881039f3280: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   15.903475]  ffff8881039f3300: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   15.904202] >ffff8881039f3380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   15.904490]                          ^
[   15.904604]  ffff8881039f3400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   15.905929]  ffff8881039f3480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   15.906227] ==================================================================