[   16.311942] ==================================================================
[   16.312369] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80
[   16.313156] Read of size 1 at addr ffff888102b6e290 by task kunit_try_catch/277
[   16.313640] 
[   16.313907] CPU: 0 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) 
[   16.314020] Tainted: [B]=BAD_PAGE, [N]=TEST
[   16.314045] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   16.314085] Call Trace:
[   16.314152]  <TASK>
[   16.314190]  dump_stack_lvl+0x73/0xb0
[   16.314273]  print_report+0xd1/0x650
[   16.314321]  ? __virt_addr_valid+0x1db/0x2d0
[   16.314401]  ? strnlen+0x73/0x80
[   16.314490]  ? kasan_complete_mode_report_info+0x64/0x200
[   16.314542]  ? strnlen+0x73/0x80
[   16.314612]  kasan_report+0x141/0x180
[   16.314669]  ? strnlen+0x73/0x80
[   16.314705]  __asan_report_load1_noabort+0x18/0x20
[   16.314728]  strnlen+0x73/0x80
[   16.314751]  kasan_strings+0x615/0xe80
[   16.314771]  ? trace_hardirqs_on+0x37/0xe0
[   16.314797]  ? __pfx_kasan_strings+0x10/0x10
[   16.314818]  ? finish_task_switch.isra.0+0x153/0x700
[   16.314841]  ? __switch_to+0x47/0xf50
[   16.314867]  ? __schedule+0x10cc/0x2b60
[   16.314890]  ? __pfx_read_tsc+0x10/0x10
[   16.314911]  ? ktime_get_ts64+0x86/0x230
[   16.314936]  kunit_try_run_case+0x1a5/0x480
[   16.314961]  ? __pfx_kunit_try_run_case+0x10/0x10
[   16.314983]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   16.315006]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   16.315028]  ? __kthread_parkme+0x82/0x180
[   16.315049]  ? preempt_count_sub+0x50/0x80
[   16.315072]  ? __pfx_kunit_try_run_case+0x10/0x10
[   16.315094]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   16.315116]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   16.315139]  kthread+0x337/0x6f0
[   16.315158]  ? trace_preempt_on+0x20/0xc0
[   16.315179]  ? __pfx_kthread+0x10/0x10
[   16.315200]  ? _raw_spin_unlock_irq+0x47/0x80
[   16.315235]  ? calculate_sigpending+0x7b/0xa0
[   16.315265]  ? __pfx_kthread+0x10/0x10
[   16.315287]  ret_from_fork+0x116/0x1d0
[   16.315305]  ? __pfx_kthread+0x10/0x10
[   16.315326]  ret_from_fork_asm+0x1a/0x30
[   16.315356]  </TASK>
[   16.315368] 
[   16.327290] Allocated by task 277:
[   16.327642]  kasan_save_stack+0x45/0x70
[   16.327965]  kasan_save_track+0x18/0x40
[   16.328311]  kasan_save_alloc_info+0x3b/0x50
[   16.328563]  __kasan_kmalloc+0xb7/0xc0
[   16.329155]  __kmalloc_cache_noprof+0x189/0x420
[   16.329712]  kasan_strings+0xc0/0xe80
[   16.329880]  kunit_try_run_case+0x1a5/0x480
[   16.330024]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   16.330193]  kthread+0x337/0x6f0
[   16.330340]  ret_from_fork+0x116/0x1d0
[   16.330677]  ret_from_fork_asm+0x1a/0x30
[   16.330882] 
[   16.330987] Freed by task 277:
[   16.331135]  kasan_save_stack+0x45/0x70
[   16.331317]  kasan_save_track+0x18/0x40
[   16.331490]  kasan_save_free_info+0x3f/0x60
[   16.331670]  __kasan_slab_free+0x56/0x70
[   16.332414]  kfree+0x222/0x3f0
[   16.332708]  kasan_strings+0x2aa/0xe80
[   16.333008]  kunit_try_run_case+0x1a5/0x480
[   16.333330]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   16.333720]  kthread+0x337/0x6f0
[   16.333877]  ret_from_fork+0x116/0x1d0
[   16.334012]  ret_from_fork_asm+0x1a/0x30
[   16.334151] 
[   16.335175] The buggy address belongs to the object at ffff888102b6e280
[   16.335175]  which belongs to the cache kmalloc-32 of size 32
[   16.336300] The buggy address is located 16 bytes inside of
[   16.336300]  freed 32-byte region [ffff888102b6e280, ffff888102b6e2a0)
[   16.336695] 
[   16.336816] The buggy address belongs to the physical page:
[   16.337179] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b6e
[   16.338209] flags: 0x200000000000000(node=0|zone=2)
[   16.338797] page_type: f5(slab)
[   16.339117] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   16.339527] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   16.340168] page dumped because: kasan: bad access detected
[   16.340744] 
[   16.340949] Memory state around the buggy address:
[   16.341162]  ffff888102b6e180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   16.341677]  ffff888102b6e200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   16.342141] >ffff888102b6e280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   16.342573]                          ^
[   16.342844]  ffff888102b6e300: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   16.343423]  ffff888102b6e380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   16.344060] ==================================================================