[   18.486655] ==================================================================
[   18.487851] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350
[   18.488717] Read of size 1 at addr ffff8881027b1d60 by task kunit_try_catch/219
[   18.490045] 
[   18.490347] CPU: 0 UID: 0 PID: 219 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc2-next-20250617 #1 PREEMPT(voluntary) 
[   18.490625] Tainted: [B]=BAD_PAGE, [N]=TEST
[   18.490665] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   18.490723] Call Trace:
[   18.490757]  <TASK>
[   18.490802]  dump_stack_lvl+0x73/0xb0
[   18.490883]  print_report+0xd1/0x650
[   18.490917]  ? __virt_addr_valid+0x1db/0x2d0
[   18.490950]  ? kmalloc_double_kzfree+0x19c/0x350
[   18.490981]  ? kasan_complete_mode_report_info+0x64/0x200
[   18.491012]  ? kmalloc_double_kzfree+0x19c/0x350
[   18.491043]  kasan_report+0x141/0x180
[   18.491073]  ? kmalloc_double_kzfree+0x19c/0x350
[   18.491108]  ? kmalloc_double_kzfree+0x19c/0x350
[   18.491139]  __kasan_check_byte+0x3d/0x50
[   18.491168]  kfree_sensitive+0x22/0x90
[   18.491198]  kmalloc_double_kzfree+0x19c/0x350
[   18.491243]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   18.491322]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   18.491391]  kunit_try_run_case+0x1a5/0x480
[   18.491430]  ? __pfx_kunit_try_run_case+0x10/0x10
[   18.491461]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   18.491490]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   18.491525]  ? __kthread_parkme+0x82/0x180
[   18.491566]  ? preempt_count_sub+0x50/0x80
[   18.491598]  ? __pfx_kunit_try_run_case+0x10/0x10
[   18.491632]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   18.491663]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   18.491693]  kthread+0x337/0x6f0
[   18.491719]  ? trace_preempt_on+0x20/0xc0
[   18.491751]  ? __pfx_kthread+0x10/0x10
[   18.491779]  ? _raw_spin_unlock_irq+0x47/0x80
[   18.491811]  ? calculate_sigpending+0x7b/0xa0
[   18.491871]  ? __pfx_kthread+0x10/0x10
[   18.491903]  ret_from_fork+0x116/0x1d0
[   18.491929]  ? __pfx_kthread+0x10/0x10
[   18.491957]  ret_from_fork_asm+0x1a/0x30
[   18.491997]  </TASK>
[   18.492013] 
[   18.509955] Allocated by task 219:
[   18.510383]  kasan_save_stack+0x45/0x70
[   18.510921]  kasan_save_track+0x18/0x40
[   18.511396]  kasan_save_alloc_info+0x3b/0x50
[   18.511887]  __kasan_kmalloc+0xb7/0xc0
[   18.512246]  __kmalloc_cache_noprof+0x189/0x420
[   18.512631]  kmalloc_double_kzfree+0xa9/0x350
[   18.512962]  kunit_try_run_case+0x1a5/0x480
[   18.513311]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   18.513961]  kthread+0x337/0x6f0
[   18.514776]  ret_from_fork+0x116/0x1d0
[   18.515145]  ret_from_fork_asm+0x1a/0x30
[   18.515671] 
[   18.515899] Freed by task 219:
[   18.516413]  kasan_save_stack+0x45/0x70
[   18.516695]  kasan_save_track+0x18/0x40
[   18.517128]  kasan_save_free_info+0x3f/0x60
[   18.517653]  __kasan_slab_free+0x56/0x70
[   18.518044]  kfree+0x222/0x3f0
[   18.518806]  kfree_sensitive+0x67/0x90
[   18.519676]  kmalloc_double_kzfree+0x12b/0x350
[   18.520457]  kunit_try_run_case+0x1a5/0x480
[   18.520987]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   18.521527]  kthread+0x337/0x6f0
[   18.522169]  ret_from_fork+0x116/0x1d0
[   18.522693]  ret_from_fork_asm+0x1a/0x30
[   18.523082] 
[   18.523479] The buggy address belongs to the object at ffff8881027b1d60
[   18.523479]  which belongs to the cache kmalloc-16 of size 16
[   18.524396] The buggy address is located 0 bytes inside of
[   18.524396]  freed 16-byte region [ffff8881027b1d60, ffff8881027b1d70)
[   18.525794] 
[   18.526014] The buggy address belongs to the physical page:
[   18.526607] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027b1
[   18.527499] flags: 0x200000000000000(node=0|zone=2)
[   18.527963] page_type: f5(slab)
[   18.528338] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   18.529030] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   18.529806] page dumped because: kasan: bad access detected
[   18.530432] 
[   18.530670] Memory state around the buggy address:
[   18.531079]  ffff8881027b1c00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   18.531606]  ffff8881027b1c80: fa fb fc fc fa fb fc fc 00 05 fc fc fa fb fc fc
[   18.532126] >ffff8881027b1d00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   18.532697]                                                        ^
[   18.533708]  ffff8881027b1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   18.534433]  ffff8881027b1e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   18.534990] ==================================================================