[   11.120759] ==================================================================
[   11.121589] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   11.122030] Read of size 16 at addr ffff888102219640 by task kunit_try_catch/188
[   11.122352] 
[   11.122462] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G    B            N  6.15.8-rc1 #1 PREEMPT(voluntary) 
[   11.122508] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.122519] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.122539] Call Trace:
[   11.122551]  <TASK>
[   11.122568]  dump_stack_lvl+0x73/0xb0
[   11.122595]  print_report+0xd1/0x610
[   11.122617]  ? __virt_addr_valid+0x1db/0x2d0
[   11.122638]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.122658]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.122679]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.122700]  kasan_report+0x141/0x180
[   11.122721]  ? kmalloc_uaf_16+0x47b/0x4c0
[   11.122747]  __asan_report_load16_noabort+0x18/0x20
[   11.122767]  kmalloc_uaf_16+0x47b/0x4c0
[   11.122788]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   11.122809]  ? __schedule+0x10c6/0x2b60
[   11.122832]  ? __pfx_read_tsc+0x10/0x10
[   11.122851]  ? ktime_get_ts64+0x86/0x230
[   11.122875]  kunit_try_run_case+0x1a5/0x480
[   11.122896]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.122913]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.122933]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.122956]  ? __kthread_parkme+0x82/0x180
[   11.122977]  ? preempt_count_sub+0x50/0x80
[   11.123002]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.123021]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.123044]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.123066]  kthread+0x337/0x6f0
[   11.123082]  ? trace_preempt_on+0x20/0xc0
[   11.123106]  ? __pfx_kthread+0x10/0x10
[   11.123123]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.123144]  ? calculate_sigpending+0x7b/0xa0
[   11.123164]  ? __pfx_kthread+0x10/0x10
[   11.123182]  ret_from_fork+0x41/0x80
[   11.123201]  ? __pfx_kthread+0x10/0x10
[   11.123218]  ret_from_fork_asm+0x1a/0x30
[   11.123261]  </TASK>
[   11.123271] 
[   11.130522] Allocated by task 188:
[   11.130724]  kasan_save_stack+0x45/0x70
[   11.130946]  kasan_save_track+0x18/0x40
[   11.131130]  kasan_save_alloc_info+0x3b/0x50
[   11.131358]  __kasan_kmalloc+0xb7/0xc0
[   11.131535]  __kmalloc_cache_noprof+0x189/0x420
[   11.131765]  kmalloc_uaf_16+0x15b/0x4c0
[   11.131976]  kunit_try_run_case+0x1a5/0x480
[   11.132179]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.132356]  kthread+0x337/0x6f0
[   11.132471]  ret_from_fork+0x41/0x80
[   11.132719]  ret_from_fork_asm+0x1a/0x30
[   11.132934] 
[   11.133029] Freed by task 188:
[   11.133181]  kasan_save_stack+0x45/0x70
[   11.133379]  kasan_save_track+0x18/0x40
[   11.133568]  kasan_save_free_info+0x3f/0x60
[   11.133775]  __kasan_slab_free+0x56/0x70
[   11.133965]  kfree+0x222/0x3f0
[   11.134074]  kmalloc_uaf_16+0x1d6/0x4c0
[   11.134204]  kunit_try_run_case+0x1a5/0x480
[   11.134461]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.134710]  kthread+0x337/0x6f0
[   11.134896]  ret_from_fork+0x41/0x80
[   11.135119]  ret_from_fork_asm+0x1a/0x30
[   11.135303] 
[   11.135371] The buggy address belongs to the object at ffff888102219640
[   11.135371]  which belongs to the cache kmalloc-16 of size 16
[   11.136074] The buggy address is located 0 bytes inside of
[   11.136074]  freed 16-byte region [ffff888102219640, ffff888102219650)
[   11.136556] 
[   11.136689] The buggy address belongs to the physical page:
[   11.136947] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102219
[   11.137341] flags: 0x200000000000000(node=0|zone=2)
[   11.137615] page_type: f5(slab)
[   11.137795] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.138117] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.138488] page dumped because: kasan: bad access detected
[   11.138802] 
[   11.138896] Memory state around the buggy address:
[   11.139131]  ffff888102219500: 00 01 fc fc 00 01 fc fc 00 04 fc fc 00 04 fc fc
[   11.139463]  ffff888102219580: 00 05 fc fc 00 04 fc fc fa fb fc fc fa fb fc fc
[   11.139855] >ffff888102219600: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc
[   11.140152]                                            ^
[   11.140476]  ffff888102219680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.140763]  ffff888102219700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.141085] ==================================================================