[   26.115641] ==================================================================
[   26.116437] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350
[   26.117170] Read of size 1 at addr ffff8881057d7660 by task kunit_try_catch/241
[   26.118179] 
[   26.118453] CPU: 0 UID: 0 PID: 241 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) 
[   26.118508] Tainted: [B]=BAD_PAGE, [N]=TEST
[   26.118521] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   26.118543] Call Trace:
[   26.118557]  <TASK>
[   26.118573]  dump_stack_lvl+0x73/0xb0
[   26.118605]  print_report+0xd1/0x640
[   26.118629]  ? __virt_addr_valid+0x1db/0x2d0
[   26.118653]  ? kmalloc_double_kzfree+0x19c/0x350
[   26.118676]  ? kasan_complete_mode_report_info+0x64/0x200
[   26.118703]  ? kmalloc_double_kzfree+0x19c/0x350
[   26.118726]  kasan_report+0x141/0x180
[   26.118748]  ? kmalloc_double_kzfree+0x19c/0x350
[   26.118884]  ? kmalloc_double_kzfree+0x19c/0x350
[   26.118916]  __kasan_check_byte+0x3d/0x50
[   26.118939]  kfree_sensitive+0x22/0x90
[   26.118975]  kmalloc_double_kzfree+0x19c/0x350
[   26.118998]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   26.119023]  ? __schedule+0x10da/0x2b60
[   26.119051]  ? __pfx_read_tsc+0x10/0x10
[   26.119075]  ? ktime_get_ts64+0x86/0x230
[   26.119100]  kunit_try_run_case+0x1a5/0x480
[   26.119126]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.119149]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   26.119171]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   26.119198]  ? __kthread_parkme+0x82/0x180
[   26.119221]  ? preempt_count_sub+0x50/0x80
[   26.119246]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.119271]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.119295]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   26.119320]  kthread+0x337/0x6f0
[   26.119340]  ? trace_preempt_on+0x20/0xc0
[   26.119364]  ? __pfx_kthread+0x10/0x10
[   26.119385]  ? _raw_spin_unlock_irq+0x47/0x80
[   26.119409]  ? calculate_sigpending+0x7b/0xa0
[   26.119433]  ? __pfx_kthread+0x10/0x10
[   26.119454]  ret_from_fork+0x116/0x1d0
[   26.119474]  ? __pfx_kthread+0x10/0x10
[   26.119495]  ret_from_fork_asm+0x1a/0x30
[   26.119527]  </TASK>
[   26.119539] 
[   26.135507] Allocated by task 241:
[   26.136072]  kasan_save_stack+0x45/0x70
[   26.136572]  kasan_save_track+0x18/0x40
[   26.137162]  kasan_save_alloc_info+0x3b/0x50
[   26.137751]  __kasan_kmalloc+0xb7/0xc0
[   26.138289]  __kmalloc_cache_noprof+0x189/0x420
[   26.138827]  kmalloc_double_kzfree+0xa9/0x350
[   26.139255]  kunit_try_run_case+0x1a5/0x480
[   26.139707]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.140325]  kthread+0x337/0x6f0
[   26.140709]  ret_from_fork+0x116/0x1d0
[   26.141204]  ret_from_fork_asm+0x1a/0x30
[   26.141626] 
[   26.141712] Freed by task 241:
[   26.142144]  kasan_save_stack+0x45/0x70
[   26.142653]  kasan_save_track+0x18/0x40
[   26.143228]  kasan_save_free_info+0x3f/0x60
[   26.143638]  __kasan_slab_free+0x5e/0x80
[   26.143964]  kfree+0x222/0x3f0
[   26.144439]  kfree_sensitive+0x67/0x90
[   26.144961]  kmalloc_double_kzfree+0x12b/0x350
[   26.145467]  kunit_try_run_case+0x1a5/0x480
[   26.145631]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.146043]  kthread+0x337/0x6f0
[   26.146502]  ret_from_fork+0x116/0x1d0
[   26.147021]  ret_from_fork_asm+0x1a/0x30
[   26.147615] 
[   26.147920] The buggy address belongs to the object at ffff8881057d7660
[   26.147920]  which belongs to the cache kmalloc-16 of size 16
[   26.148759] The buggy address is located 0 bytes inside of
[   26.148759]  freed 16-byte region [ffff8881057d7660, ffff8881057d7670)
[   26.149768] 
[   26.150031] The buggy address belongs to the physical page:
[   26.150800] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057d7
[   26.151833] flags: 0x200000000000000(node=0|zone=2)
[   26.152474] page_type: f5(slab)
[   26.152933] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   26.153590] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   26.154027] page dumped because: kasan: bad access detected
[   26.154781] 
[   26.155125] Memory state around the buggy address:
[   26.155690]  ffff8881057d7500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   26.156605]  ffff8881057d7580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   26.157058] >ffff8881057d7600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   26.157965]                                                        ^
[   26.158776]  ffff8881057d7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.159043]  ffff8881057d7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.160026] ==================================================================