[   11.741748] ==================================================================
[   11.742505] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350
[   11.742820] Read of size 1 at addr ffff888102ae9120 by task kunit_try_catch/209
[   11.743158] 
[   11.743322] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-next-20250605 #1 PREEMPT(voluntary) 
[   11.743368] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.743378] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.743398] Call Trace:
[   11.743409]  <TASK>
[   11.743423]  dump_stack_lvl+0x73/0xb0
[   11.743449]  print_report+0xd1/0x650
[   11.743471]  ? __virt_addr_valid+0x1db/0x2d0
[   11.743494]  ? kmalloc_double_kzfree+0x19c/0x350
[   11.743516]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.743538]  ? kmalloc_double_kzfree+0x19c/0x350
[   11.743561]  kasan_report+0x141/0x180
[   11.743583]  ? kmalloc_double_kzfree+0x19c/0x350
[   11.743608]  ? kmalloc_double_kzfree+0x19c/0x350
[   11.743642]  __kasan_check_byte+0x3d/0x50
[   11.743664]  kfree_sensitive+0x22/0x90
[   11.743686]  kmalloc_double_kzfree+0x19c/0x350
[   11.743708]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   11.743732]  ? __schedule+0x10cc/0x2b60
[   11.743756]  ? __pfx_read_tsc+0x10/0x10
[   11.743776]  ? ktime_get_ts64+0x86/0x230
[   11.743799]  kunit_try_run_case+0x1a5/0x480
[   11.743820]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.743839]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.743863]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.743887]  ? __kthread_parkme+0x82/0x180
[   11.743921]  ? preempt_count_sub+0x50/0x80
[   11.743988]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.744012]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.744036]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.744060]  kthread+0x337/0x6f0
[   11.744079]  ? trace_preempt_on+0x20/0xc0
[   11.744100]  ? __pfx_kthread+0x10/0x10
[   11.744120]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.744143]  ? calculate_sigpending+0x7b/0xa0
[   11.744166]  ? __pfx_kthread+0x10/0x10
[   11.744187]  ret_from_fork+0x116/0x1d0
[   11.744205]  ? __pfx_kthread+0x10/0x10
[   11.744225]  ret_from_fork_asm+0x1a/0x30
[   11.744255]  </TASK>
[   11.744265] 
[   11.752093] Allocated by task 209:
[   11.752286]  kasan_save_stack+0x45/0x70
[   11.752574]  kasan_save_track+0x18/0x40
[   11.752827]  kasan_save_alloc_info+0x3b/0x50
[   11.753175]  __kasan_kmalloc+0xb7/0xc0
[   11.753320]  __kmalloc_cache_noprof+0x189/0x420
[   11.753477]  kmalloc_double_kzfree+0xa9/0x350
[   11.753669]  kunit_try_run_case+0x1a5/0x480
[   11.753873]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.754154]  kthread+0x337/0x6f0
[   11.754427]  ret_from_fork+0x116/0x1d0
[   11.754565]  ret_from_fork_asm+0x1a/0x30
[   11.754703] 
[   11.754773] Freed by task 209:
[   11.754883]  kasan_save_stack+0x45/0x70
[   11.755240]  kasan_save_track+0x18/0x40
[   11.755448]  kasan_save_free_info+0x3f/0x60
[   11.755661]  __kasan_slab_free+0x56/0x70
[   11.755860]  kfree+0x222/0x3f0
[   11.756102]  kfree_sensitive+0x67/0x90
[   11.756251]  kmalloc_double_kzfree+0x12b/0x350
[   11.756411]  kunit_try_run_case+0x1a5/0x480
[   11.756610]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.756908]  kthread+0x337/0x6f0
[   11.757113]  ret_from_fork+0x116/0x1d0
[   11.757256]  ret_from_fork_asm+0x1a/0x30
[   11.757450] 
[   11.757544] The buggy address belongs to the object at ffff888102ae9120
[   11.757544]  which belongs to the cache kmalloc-16 of size 16
[   11.757972] The buggy address is located 0 bytes inside of
[   11.757972]  freed 16-byte region [ffff888102ae9120, ffff888102ae9130)
[   11.758363] 
[   11.758467] The buggy address belongs to the physical page:
[   11.758716] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ae9
[   11.759082] flags: 0x200000000000000(node=0|zone=2)
[   11.759339] page_type: f5(slab)
[   11.759615] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.760183] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.760496] page dumped because: kasan: bad access detected
[   11.760736] 
[   11.760837] Memory state around the buggy address:
[   11.761135]  ffff888102ae9000: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc
[   11.761411]  ffff888102ae9080: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc
[   11.761733] >ffff888102ae9100: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc
[   11.761964]                                ^
[   11.762165]  ffff888102ae9180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.762554]  ffff888102ae9200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.762857] ==================================================================