[   15.849109] ==================================================================
[   15.849478] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0
[   15.850108] Read of size 1 at addr ffff8881038e5fd0 by task kunit_try_catch/277
[   15.850499] 
[   15.850669] CPU: 0 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT(voluntary) 
[   15.850725] Tainted: [B]=BAD_PAGE, [N]=TEST
[   15.850740] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   15.850767] Call Trace:
[   15.850790]  <TASK>
[   15.850814]  dump_stack_lvl+0x73/0xb0
[   15.850848]  print_report+0xd1/0x650
[   15.850876]  ? __virt_addr_valid+0x1db/0x2d0
[   15.850903]  ? strlen+0x8f/0xb0
[   15.850923]  ? kasan_complete_mode_report_info+0x64/0x200
[   15.850958]  ? strlen+0x8f/0xb0
[   15.850978]  kasan_report+0x141/0x180
[   15.851049]  ? strlen+0x8f/0xb0
[   15.851076]  __asan_report_load1_noabort+0x18/0x20
[   15.851105]  strlen+0x8f/0xb0
[   15.851126]  kasan_strings+0x57b/0xe80
[   15.851149]  ? trace_hardirqs_on+0x37/0xe0
[   15.851178]  ? __pfx_kasan_strings+0x10/0x10
[   15.851201]  ? finish_task_switch.isra.0+0x153/0x700
[   15.851227]  ? __switch_to+0x47/0xf50
[   15.851257]  ? __schedule+0x10cc/0x2b60
[   15.851285]  ? __pfx_read_tsc+0x10/0x10
[   15.851310]  ? ktime_get_ts64+0x86/0x230
[   15.851337]  kunit_try_run_case+0x1a5/0x480
[   15.851366]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.851392]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   15.851420]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   15.851536]  ? __kthread_parkme+0x82/0x180
[   15.851564]  ? preempt_count_sub+0x50/0x80
[   15.851591]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.851619]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.851661]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   15.851688]  kthread+0x337/0x6f0
[   15.851711]  ? trace_preempt_on+0x20/0xc0
[   15.851738]  ? __pfx_kthread+0x10/0x10
[   15.851874]  ? _raw_spin_unlock_irq+0x47/0x80
[   15.851908]  ? calculate_sigpending+0x7b/0xa0
[   15.851938]  ? __pfx_kthread+0x10/0x10
[   15.851964]  ret_from_fork+0x116/0x1d0
[   15.851989]  ? __pfx_kthread+0x10/0x10
[   15.852012]  ret_from_fork_asm+0x1a/0x30
[   15.852050]  </TASK>
[   15.852064] 
[   15.862128] Allocated by task 277:
[   15.862389]  kasan_save_stack+0x45/0x70
[   15.862609]  kasan_save_track+0x18/0x40
[   15.863062]  kasan_save_alloc_info+0x3b/0x50
[   15.863326]  __kasan_kmalloc+0xb7/0xc0
[   15.863551]  __kmalloc_cache_noprof+0x189/0x420
[   15.863834]  kasan_strings+0xc0/0xe80
[   15.864163]  kunit_try_run_case+0x1a5/0x480
[   15.864454]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.864847]  kthread+0x337/0x6f0
[   15.865058]  ret_from_fork+0x116/0x1d0
[   15.865276]  ret_from_fork_asm+0x1a/0x30
[   15.865508] 
[   15.865623] Freed by task 277:
[   15.865804]  kasan_save_stack+0x45/0x70
[   15.866076]  kasan_save_track+0x18/0x40
[   15.866318]  kasan_save_free_info+0x3f/0x60
[   15.866569]  __kasan_slab_free+0x56/0x70
[   15.867024]  kfree+0x222/0x3f0
[   15.867203]  kasan_strings+0x2aa/0xe80
[   15.867365]  kunit_try_run_case+0x1a5/0x480
[   15.867659]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.868024]  kthread+0x337/0x6f0
[   15.868178]  ret_from_fork+0x116/0x1d0
[   15.868359]  ret_from_fork_asm+0x1a/0x30
[   15.868731] 
[   15.868951] The buggy address belongs to the object at ffff8881038e5fc0
[   15.868951]  which belongs to the cache kmalloc-32 of size 32
[   15.869509] The buggy address is located 16 bytes inside of
[   15.869509]  freed 32-byte region [ffff8881038e5fc0, ffff8881038e5fe0)
[   15.870207] 
[   15.870332] The buggy address belongs to the physical page:
[   15.870621] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e5
[   15.871252] flags: 0x200000000000000(node=0|zone=2)
[   15.871506] page_type: f5(slab)
[   15.871753] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   15.872261] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000
[   15.872677] page dumped because: kasan: bad access detected
[   15.872972] 
[   15.873058] Memory state around the buggy address:
[   15.873322]  ffff8881038e5e80: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc
[   15.873672]  ffff8881038e5f00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   15.874054] >ffff8881038e5f80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   15.874433]                                                  ^
[   15.875017]  ffff8881038e6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   15.875325]  ffff8881038e6080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   15.875716] ==================================================================