[   31.720607] ==================================================================
[   31.721207] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0
[   31.721787] Read of size 1 at addr ffff888103b4da50 by task kunit_try_catch/289
[   31.722531] 
[   31.722800] CPU: 1 UID: 0 PID: 289 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250624 #1 PREEMPT(voluntary) 
[   31.722916] Tainted: [B]=BAD_PAGE, [N]=TEST
[   31.722947] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   31.722998] Call Trace:
[   31.723041]  <TASK>
[   31.723220]  dump_stack_lvl+0x73/0xb0
[   31.723317]  print_report+0xd1/0x650
[   31.723381]  ? __virt_addr_valid+0x1db/0x2d0
[   31.723445]  ? strlen+0x8f/0xb0
[   31.723500]  ? kasan_complete_mode_report_info+0x64/0x200
[   31.723581]  ? strlen+0x8f/0xb0
[   31.723662]  kasan_report+0x141/0x180
[   31.723723]  ? strlen+0x8f/0xb0
[   31.723798]  __asan_report_load1_noabort+0x18/0x20
[   31.723892]  strlen+0x8f/0xb0
[   31.723958]  kasan_strings+0x57b/0xe80
[   31.724028]  ? trace_hardirqs_on+0x37/0xe0
[   31.724252]  ? __pfx_kasan_strings+0x10/0x10
[   31.724289]  ? finish_task_switch.isra.0+0x153/0x700
[   31.724322]  ? __switch_to+0x47/0xf50
[   31.724357]  ? __schedule+0x10cc/0x2b60
[   31.724391]  ? __pfx_read_tsc+0x10/0x10
[   31.724421]  ? ktime_get_ts64+0x86/0x230
[   31.724453]  kunit_try_run_case+0x1a5/0x480
[   31.724488]  ? __pfx_kunit_try_run_case+0x10/0x10
[   31.724517]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   31.724570]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   31.724604]  ? __kthread_parkme+0x82/0x180
[   31.724664]  ? preempt_count_sub+0x50/0x80
[   31.724701]  ? __pfx_kunit_try_run_case+0x10/0x10
[   31.724733]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   31.724765]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   31.724798]  kthread+0x337/0x6f0
[   31.724824]  ? trace_preempt_on+0x20/0xc0
[   31.724855]  ? __pfx_kthread+0x10/0x10
[   31.724881]  ? _raw_spin_unlock_irq+0x47/0x80
[   31.724914]  ? calculate_sigpending+0x7b/0xa0
[   31.724945]  ? __pfx_kthread+0x10/0x10
[   31.724974]  ret_from_fork+0x116/0x1d0
[   31.725000]  ? __pfx_kthread+0x10/0x10
[   31.725026]  ret_from_fork_asm+0x1a/0x30
[   31.725078]  </TASK>
[   31.725101] 
[   31.741296] Allocated by task 289:
[   31.741729]  kasan_save_stack+0x45/0x70
[   31.742135]  kasan_save_track+0x18/0x40
[   31.742563]  kasan_save_alloc_info+0x3b/0x50
[   31.742863]  __kasan_kmalloc+0xb7/0xc0
[   31.743368]  __kmalloc_cache_noprof+0x189/0x420
[   31.743843]  kasan_strings+0xc0/0xe80
[   31.744178]  kunit_try_run_case+0x1a5/0x480
[   31.744662]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   31.745167]  kthread+0x337/0x6f0
[   31.746126]  ret_from_fork+0x116/0x1d0
[   31.746775]  ret_from_fork_asm+0x1a/0x30
[   31.747038] 
[   31.747210] Freed by task 289:
[   31.747661]  kasan_save_stack+0x45/0x70
[   31.748073]  kasan_save_track+0x18/0x40
[   31.748464]  kasan_save_free_info+0x3f/0x60
[   31.749048]  __kasan_slab_free+0x56/0x70
[   31.749457]  kfree+0x222/0x3f0
[   31.749875]  kasan_strings+0x2aa/0xe80
[   31.750206]  kunit_try_run_case+0x1a5/0x480
[   31.750476]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   31.751430]  kthread+0x337/0x6f0
[   31.751841]  ret_from_fork+0x116/0x1d0
[   31.752427]  ret_from_fork_asm+0x1a/0x30
[   31.752843] 
[   31.753073] The buggy address belongs to the object at ffff888103b4da40
[   31.753073]  which belongs to the cache kmalloc-32 of size 32
[   31.754015] The buggy address is located 16 bytes inside of
[   31.754015]  freed 32-byte region [ffff888103b4da40, ffff888103b4da60)
[   31.755058] 
[   31.755356] The buggy address belongs to the physical page:
[   31.755870] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103b4d
[   31.756311] flags: 0x200000000000000(node=0|zone=2)
[   31.756835] page_type: f5(slab)
[   31.757190] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   31.758416] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   31.759023] page dumped because: kasan: bad access detected
[   31.759678] 
[   31.759863] Memory state around the buggy address:
[   31.760245]  ffff888103b4d900: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.760907]  ffff888103b4d980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.761595] >ffff888103b4da00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.762169]                                                  ^
[   31.763138]  ffff888103b4da80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.763790]  ffff888103b4db00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.764571] ==================================================================