[   13.959944] ==================================================================
[   13.960247] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   13.960723] Read of size 1 at addr ffff88810397b990 by task kunit_try_catch/276
[   13.961046] 
[   13.961141] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6 #1 PREEMPT(voluntary) 
[   13.961183] Tainted: [B]=BAD_PAGE, [N]=TEST
[   13.961195] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   13.961215] Call Trace:
[   13.961229]  <TASK>
[   13.961242]  dump_stack_lvl+0x73/0xb0
[   13.961269]  print_report+0xd1/0x610
[   13.961291]  ? __virt_addr_valid+0x1db/0x2d0
[   13.961312]  ? strnlen+0x73/0x80
[   13.961329]  ? kasan_complete_mode_report_info+0x64/0x200
[   13.961351]  ? strnlen+0x73/0x80
[   13.961369]  kasan_report+0x141/0x180
[   13.961389]  ? strnlen+0x73/0x80
[   13.961424]  __asan_report_load1_noabort+0x18/0x20
[   13.961448]  strnlen+0x73/0x80
[   13.961467]  kasan_strings+0x615/0xe80
[   13.961486]  ? trace_hardirqs_on+0x37/0xe0
[   13.961508]  ? __pfx_kasan_strings+0x10/0x10
[   13.961528]  ? finish_task_switch.isra.0+0x153/0x700
[   13.961549]  ? __switch_to+0x47/0xf50
[   13.961574]  ? __schedule+0x10cc/0x2b60
[   13.961597]  ? __pfx_read_tsc+0x10/0x10
[   13.961617]  ? ktime_get_ts64+0x86/0x230
[   13.961641]  kunit_try_run_case+0x1a5/0x480
[   13.961664]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.961686]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   13.961709]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   13.961732]  ? __kthread_parkme+0x82/0x180
[   13.961752]  ? preempt_count_sub+0x50/0x80
[   13.961774]  ? __pfx_kunit_try_run_case+0x10/0x10
[   13.961797]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.961819]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   13.961842]  kthread+0x337/0x6f0
[   13.961862]  ? trace_preempt_on+0x20/0xc0
[   13.961882]  ? __pfx_kthread+0x10/0x10
[   13.961902]  ? _raw_spin_unlock_irq+0x47/0x80
[   13.961922]  ? calculate_sigpending+0x7b/0xa0
[   13.961945]  ? __pfx_kthread+0x10/0x10
[   13.961965]  ret_from_fork+0x116/0x1d0
[   13.961983]  ? __pfx_kthread+0x10/0x10
[   13.962014]  ret_from_fork_asm+0x1a/0x30
[   13.962045]  </TASK>
[   13.962054] 
[   13.969857] Allocated by task 276:
[   13.969992]  kasan_save_stack+0x45/0x70
[   13.970145]  kasan_save_track+0x18/0x40
[   13.970279]  kasan_save_alloc_info+0x3b/0x50
[   13.970427]  __kasan_kmalloc+0xb7/0xc0
[   13.970560]  __kmalloc_cache_noprof+0x189/0x420
[   13.970715]  kasan_strings+0xc0/0xe80
[   13.970846]  kunit_try_run_case+0x1a5/0x480
[   13.970991]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.971476]  kthread+0x337/0x6f0
[   13.971834]  ret_from_fork+0x116/0x1d0
[   13.972035]  ret_from_fork_asm+0x1a/0x30
[   13.972227] 
[   13.972319] Freed by task 276:
[   13.972677]  kasan_save_stack+0x45/0x70
[   13.972879]  kasan_save_track+0x18/0x40
[   13.973085]  kasan_save_free_info+0x3f/0x60
[   13.973294]  __kasan_slab_free+0x56/0x70
[   13.973666]  kfree+0x222/0x3f0
[   13.973790]  kasan_strings+0x2aa/0xe80
[   13.973922]  kunit_try_run_case+0x1a5/0x480
[   13.974111]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   13.974507]  kthread+0x337/0x6f0
[   13.974697]  ret_from_fork+0x116/0x1d0
[   13.974885]  ret_from_fork_asm+0x1a/0x30
[   13.975083] 
[   13.975158] The buggy address belongs to the object at ffff88810397b980
[   13.975158]  which belongs to the cache kmalloc-32 of size 32
[   13.975901] The buggy address is located 16 bytes inside of
[   13.975901]  freed 32-byte region [ffff88810397b980, ffff88810397b9a0)
[   13.976321] 
[   13.976500] The buggy address belongs to the physical page:
[   13.976764] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10397b
[   13.977102] flags: 0x200000000000000(node=0|zone=2)
[   13.977263] page_type: f5(slab)
[   13.977495] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   13.977854] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   13.978189] page dumped because: kasan: bad access detected
[   13.978599] 
[   13.978678] Memory state around the buggy address:
[   13.978878]  ffff88810397b880: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc
[   13.979168]  ffff88810397b900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.979444] >ffff88810397b980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.979794]                          ^
[   13.979925]  ffff88810397ba00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   13.980152]  ffff88810397ba80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   13.980364] ==================================================================