[   13.274968] ==================================================================
[   13.275260] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0
[   13.275458] Read of size 1 at addr ffff88810360c050 by task kunit_try_catch/279
[   13.275692] 
[   13.275913] CPU: 0 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G    B            N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[   13.275957] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.275969] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.275990] Call Trace:
[   13.276005]  <TASK>
[   13.276021]  dump_stack_lvl+0x73/0xb0
[   13.276046]  print_report+0xd1/0x650
[   13.276070]  ? __virt_addr_valid+0x1db/0x2d0
[   13.276092]  ? strlen+0x8f/0xb0
[   13.276111]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.276134]  ? strlen+0x8f/0xb0
[   13.276153]  kasan_report+0x141/0x180
[   13.276177]  ? strlen+0x8f/0xb0
[   13.276200]  __asan_report_load1_noabort+0x18/0x20
[   13.276223]  strlen+0x8f/0xb0
[   13.276242]  kasan_strings+0x57b/0xe80
[   13.276263]  ? trace_hardirqs_on+0x37/0xe0
[   13.276286]  ? __pfx_kasan_strings+0x10/0x10
[   13.276308]  ? finish_task_switch.isra.0+0x153/0x700
[   13.276332]  ? __switch_to+0x5d9/0xf60
[   13.276353]  ? dequeue_task_fair+0x166/0x4e0
[   13.276378]  ? __schedule+0x10cc/0x2b60
[   13.276402]  ? __pfx_read_tsc+0x10/0x10
[   13.276422]  ? ktime_get_ts64+0x86/0x230
[   13.276448]  kunit_try_run_case+0x1a5/0x480
[   13.276470]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.276490]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.276515]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.276539]  ? __kthread_parkme+0x82/0x180
[   13.276561]  ? preempt_count_sub+0x50/0x80
[   13.276587]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.276609]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.276634]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.276658]  kthread+0x337/0x6f0
[   13.276675]  ? trace_preempt_on+0x20/0xc0
[   13.276699]  ? __pfx_kthread+0x10/0x10
[   13.276717]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.276740]  ? calculate_sigpending+0x7b/0xa0
[   13.276762]  ? __pfx_kthread+0x10/0x10
[   13.276781]  ret_from_fork+0x41/0x80
[   13.276802]  ? __pfx_kthread+0x10/0x10
[   13.276821]  ret_from_fork_asm+0x1a/0x30
[   13.276851]  </TASK>
[   13.276862] 
[   13.285592] Allocated by task 279:
[   13.285740]  kasan_save_stack+0x45/0x70
[   13.285984]  kasan_save_track+0x18/0x40
[   13.286205]  kasan_save_alloc_info+0x3b/0x50
[   13.286359]  __kasan_kmalloc+0xb7/0xc0
[   13.286495]  __kmalloc_cache_noprof+0x189/0x420
[   13.286705]  kasan_strings+0xc0/0xe80
[   13.286961]  kunit_try_run_case+0x1a5/0x480
[   13.287178]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.287433]  kthread+0x337/0x6f0
[   13.287641]  ret_from_fork+0x41/0x80
[   13.287775]  ret_from_fork_asm+0x1a/0x30
[   13.288033] 
[   13.288135] Freed by task 279:
[   13.288300]  kasan_save_stack+0x45/0x70
[   13.288498]  kasan_save_track+0x18/0x40
[   13.288648]  kasan_save_free_info+0x3f/0x60
[   13.289019]  __kasan_slab_free+0x56/0x70
[   13.289238]  kfree+0x222/0x3f0
[   13.289403]  kasan_strings+0x2aa/0xe80
[   13.289579]  kunit_try_run_case+0x1a5/0x480
[   13.289747]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.290048]  kthread+0x337/0x6f0
[   13.290228]  ret_from_fork+0x41/0x80
[   13.290405]  ret_from_fork_asm+0x1a/0x30
[   13.290595] 
[   13.290689] The buggy address belongs to the object at ffff88810360c040
[   13.290689]  which belongs to the cache kmalloc-32 of size 32
[   13.291264] The buggy address is located 16 bytes inside of
[   13.291264]  freed 32-byte region [ffff88810360c040, ffff88810360c060)
[   13.291616] 
[   13.291689] The buggy address belongs to the physical page:
[   13.291861] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10360c
[   13.292335] flags: 0x200000000000000(node=0|zone=2)
[   13.292647] page_type: f5(slab)
[   13.292819] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   13.293208] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   13.293451] page dumped because: kasan: bad access detected
[   13.293935] 
[   13.294027] Memory state around the buggy address:
[   13.294250]  ffff88810360bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.294570]  ffff88810360bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   13.295016] >ffff88810360c000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.295315]                                                  ^
[   13.295587]  ffff88810360c080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.295908]  ffff88810360c100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   13.296188] ==================================================================