[   12.839257] ==================================================================
[   12.839821] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350
[   12.840169] Read of size 1 at addr ffff888101debe80 by task kunit_try_catch/209
[   12.840471] 
[   12.840579] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[   12.840620] Tainted: [B]=BAD_PAGE, [N]=TEST
[   12.840631] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   12.840650] Call Trace:
[   12.840662]  <TASK>
[   12.840676]  dump_stack_lvl+0x73/0xb0
[   12.840706]  print_report+0xd1/0x650
[   12.840728]  ? __virt_addr_valid+0x1db/0x2d0
[   12.840751]  ? kmalloc_double_kzfree+0x19c/0x350
[   12.840773]  ? kasan_complete_mode_report_info+0x64/0x200
[   12.840796]  ? kmalloc_double_kzfree+0x19c/0x350
[   12.840819]  kasan_report+0x141/0x180
[   12.840840]  ? kmalloc_double_kzfree+0x19c/0x350
[   12.840866]  ? kmalloc_double_kzfree+0x19c/0x350
[   12.840889]  __kasan_check_byte+0x3d/0x50
[   12.840910]  kfree_sensitive+0x22/0x90
[   12.840933]  kmalloc_double_kzfree+0x19c/0x350
[   12.840956]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   12.841054]  ? __schedule+0x10cc/0x2b60
[   12.841077]  ? __pfx_read_tsc+0x10/0x10
[   12.841098]  ? ktime_get_ts64+0x86/0x230
[   12.841121]  kunit_try_run_case+0x1a5/0x480
[   12.841146]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.841168]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   12.841192]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   12.841217]  ? __kthread_parkme+0x82/0x180
[   12.841238]  ? preempt_count_sub+0x50/0x80
[   12.841262]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.841287]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.841311]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   12.841336]  kthread+0x337/0x6f0
[   12.841354]  ? trace_preempt_on+0x20/0xc0
[   12.841377]  ? __pfx_kthread+0x10/0x10
[   12.841397]  ? _raw_spin_unlock_irq+0x47/0x80
[   12.841418]  ? calculate_sigpending+0x7b/0xa0
[   12.841441]  ? __pfx_kthread+0x10/0x10
[   12.841462]  ret_from_fork+0x116/0x1d0
[   12.841480]  ? __pfx_kthread+0x10/0x10
[   12.841499]  ret_from_fork_asm+0x1a/0x30
[   12.841530]  </TASK>
[   12.841539] 
[   12.849069] Allocated by task 209:
[   12.849219]  kasan_save_stack+0x45/0x70
[   12.849367]  kasan_save_track+0x18/0x40
[   12.849502]  kasan_save_alloc_info+0x3b/0x50
[   12.849727]  __kasan_kmalloc+0xb7/0xc0
[   12.849927]  __kmalloc_cache_noprof+0x189/0x420
[   12.850351]  kmalloc_double_kzfree+0xa9/0x350
[   12.850561]  kunit_try_run_case+0x1a5/0x480
[   12.850732]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.850905]  kthread+0x337/0x6f0
[   12.851023]  ret_from_fork+0x116/0x1d0
[   12.851385]  ret_from_fork_asm+0x1a/0x30
[   12.851587] 
[   12.851680] Freed by task 209:
[   12.851830]  kasan_save_stack+0x45/0x70
[   12.852390]  kasan_save_track+0x18/0x40
[   12.852561]  kasan_save_free_info+0x3f/0x60
[   12.852756]  __kasan_slab_free+0x56/0x70
[   12.853080]  kfree+0x222/0x3f0
[   12.853225]  kfree_sensitive+0x67/0x90
[   12.853374]  kmalloc_double_kzfree+0x12b/0x350
[   12.853526]  kunit_try_run_case+0x1a5/0x480
[   12.853718]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.853989]  kthread+0x337/0x6f0
[   12.854170]  ret_from_fork+0x116/0x1d0
[   12.854355]  ret_from_fork_asm+0x1a/0x30
[   12.854540] 
[   12.854636] The buggy address belongs to the object at ffff888101debe80
[   12.854636]  which belongs to the cache kmalloc-16 of size 16
[   12.855248] The buggy address is located 0 bytes inside of
[   12.855248]  freed 16-byte region [ffff888101debe80, ffff888101debe90)
[   12.855703] 
[   12.855774] The buggy address belongs to the physical page:
[   12.855950] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101deb
[   12.856200] flags: 0x200000000000000(node=0|zone=2)
[   12.856362] page_type: f5(slab)
[   12.856527] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   12.856877] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   12.857377] page dumped because: kasan: bad access detected
[   12.857545] 
[   12.857612] Memory state around the buggy address:
[   12.857763]  ffff888101debd80: 00 02 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   12.857973]  ffff888101debe00: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   12.858662] >ffff888101debe80: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.859256]                    ^
[   12.859423]  ffff888101debf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.859741]  ffff888101debf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.860192] ==================================================================