[   14.012803] ==================================================================
[   14.013796] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   14.014099] Read of size 1 at addr ffff888103994910 by task kunit_try_catch/276
[   14.014478] 
[   14.014574] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc4 #1 PREEMPT(voluntary) 
[   14.014624] Tainted: [B]=BAD_PAGE, [N]=TEST
[   14.014636] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   14.014659] Call Trace:
[   14.014679]  <TASK>
[   14.014700]  dump_stack_lvl+0x73/0xb0
[   14.014731]  print_report+0xd1/0x650
[   14.014755]  ? __virt_addr_valid+0x1db/0x2d0
[   14.014779]  ? strnlen+0x73/0x80
[   14.014796]  ? kasan_complete_mode_report_info+0x64/0x200
[   14.014818]  ? strnlen+0x73/0x80
[   14.014835]  kasan_report+0x141/0x180
[   14.014856]  ? strnlen+0x73/0x80
[   14.014878]  __asan_report_load1_noabort+0x18/0x20
[   14.014904]  strnlen+0x73/0x80
[   14.014921]  kasan_strings+0x615/0xe80
[   14.014941]  ? trace_hardirqs_on+0x37/0xe0
[   14.014965]  ? __pfx_kasan_strings+0x10/0x10
[   14.014985]  ? finish_task_switch.isra.0+0x153/0x700
[   14.015006]  ? __switch_to+0x47/0xf50
[   14.015031]  ? __schedule+0x10cc/0x2b60
[   14.015053]  ? __pfx_read_tsc+0x10/0x10
[   14.015074]  ? ktime_get_ts64+0x86/0x230
[   14.015097]  kunit_try_run_case+0x1a5/0x480
[   14.015121]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.015143]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   14.015166]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   14.015188]  ? __kthread_parkme+0x82/0x180
[   14.015208]  ? preempt_count_sub+0x50/0x80
[   14.015244]  ? __pfx_kunit_try_run_case+0x10/0x10
[   14.015267]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.015289]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   14.015333]  kthread+0x337/0x6f0
[   14.015352]  ? trace_preempt_on+0x20/0xc0
[   14.015373]  ? __pfx_kthread+0x10/0x10
[   14.015392]  ? _raw_spin_unlock_irq+0x47/0x80
[   14.015413]  ? calculate_sigpending+0x7b/0xa0
[   14.015436]  ? __pfx_kthread+0x10/0x10
[   14.015457]  ret_from_fork+0x116/0x1d0
[   14.015475]  ? __pfx_kthread+0x10/0x10
[   14.015495]  ret_from_fork_asm+0x1a/0x30
[   14.015526]  </TASK>
[   14.015537] 
[   14.023718] Allocated by task 276:
[   14.023880]  kasan_save_stack+0x45/0x70
[   14.024097]  kasan_save_track+0x18/0x40
[   14.024387]  kasan_save_alloc_info+0x3b/0x50
[   14.024611]  __kasan_kmalloc+0xb7/0xc0
[   14.024803]  __kmalloc_cache_noprof+0x189/0x420
[   14.025038]  kasan_strings+0xc0/0xe80
[   14.025319]  kunit_try_run_case+0x1a5/0x480
[   14.025541]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.025793]  kthread+0x337/0x6f0
[   14.025941]  ret_from_fork+0x116/0x1d0
[   14.026079]  ret_from_fork_asm+0x1a/0x30
[   14.026617] 
[   14.026725] Freed by task 276:
[   14.026866]  kasan_save_stack+0x45/0x70
[   14.027008]  kasan_save_track+0x18/0x40
[   14.027142]  kasan_save_free_info+0x3f/0x60
[   14.027305]  __kasan_slab_free+0x56/0x70
[   14.027561]  kfree+0x222/0x3f0
[   14.027734]  kasan_strings+0x2aa/0xe80
[   14.027929]  kunit_try_run_case+0x1a5/0x480
[   14.028144]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   14.028414]  kthread+0x337/0x6f0
[   14.028622]  ret_from_fork+0x116/0x1d0
[   14.028830]  ret_from_fork_asm+0x1a/0x30
[   14.029032] 
[   14.029131] The buggy address belongs to the object at ffff888103994900
[   14.029131]  which belongs to the cache kmalloc-32 of size 32
[   14.029667] The buggy address is located 16 bytes inside of
[   14.029667]  freed 32-byte region [ffff888103994900, ffff888103994920)
[   14.030021] 
[   14.030111] The buggy address belongs to the physical page:
[   14.030376] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103994
[   14.030729] flags: 0x200000000000000(node=0|zone=2)
[   14.030939] page_type: f5(slab)
[   14.031064] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   14.031783] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   14.032139] page dumped because: kasan: bad access detected
[   14.032572] 
[   14.032655] Memory state around the buggy address:
[   14.032864]  ffff888103994800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   14.033082]  ffff888103994880: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   14.033312] >ffff888103994900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.033526]                          ^
[   14.033656]  ffff888103994980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   14.033871]  ffff888103994a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   14.034144] ==================================================================