[   51.703983] ==================================================================
[   51.704680] BUG: KASAN: double-free in kfree+0x7c/0x120
[   51.705999] Free of addr ffff888101a81400 by task kunit_try_catch/228
[   51.706523] 
[   51.706866] CPU: 0 PID: 228 Comm: kunit_try_catch Tainted: G    B            N 6.6.76-rc1 #1
[   51.707770] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   51.708577] Call Trace:
[   51.708977]  <TASK>
[   51.710033]  dump_stack_lvl+0x4e/0x90
[   51.710550]  print_report+0xd2/0x660
[   51.711122]  ? __virt_addr_valid+0x156/0x1e0
[   51.711667]  ? kfree+0x7c/0x120
[   51.712620]  ? kasan_complete_mode_report_info+0x64/0x200
[   51.713769]  ? kfree+0x7c/0x120
[   51.714354]  kasan_report_invalid_free+0xcf/0x100
[   51.715272]  ? kfree+0x7c/0x120
[   51.715730]  ? kfree+0x7c/0x120
[   51.716146]  ____kasan_slab_free+0x19c/0x1d0
[   51.716657]  ? kfree_sensitive+0x2e/0x90
[   51.717631]  __kasan_slab_free+0x16/0x20
[   51.718416]  __kmem_cache_free+0x190/0x310
[   51.719162]  kfree+0x7c/0x120
[   51.719818]  kfree_sensitive+0x2e/0x90
[   51.720487]  kmalloc_double_kzfree+0xd4/0x1d0
[   51.721762]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   51.722506]  ? __schedule+0x70b/0x1190
[   51.723123]  ? ktime_get_ts64+0x118/0x140
[   51.723811]  kunit_try_run_case+0x126/0x290
[   51.724399]  ? __pfx_kunit_try_run_case+0x10/0x10
[   51.725068]  ? __kasan_check_write+0x18/0x20
[   51.726137]  ? trace_preempt_on+0x20/0xa0
[   51.726404]  ? __kthread_parkme+0x4f/0xd0
[   51.726649]  ? preempt_count_sub+0x50/0x80
[   51.727458]  ? __pfx_kunit_try_run_case+0x10/0x10
[   51.728134]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   51.729638]  kunit_generic_run_threadfn_adapter+0x33/0x50
[   51.730231]  kthread+0x19e/0x1e0
[   51.730749]  ? __pfx_kthread+0x10/0x10
[   51.731601]  ret_from_fork+0x41/0x70
[   51.732633]  ? __pfx_kthread+0x10/0x10
[   51.733386]  ret_from_fork_asm+0x1b/0x30
[   51.734333]  </TASK>
[   51.734582] 
[   51.734865] Allocated by task 228:
[   51.735311]  kasan_save_stack+0x3c/0x60
[   51.736135]  kasan_set_track+0x29/0x40
[   51.736540]  kasan_save_alloc_info+0x22/0x30
[   51.737355]  __kasan_kmalloc+0xb7/0xc0
[   51.738244]  kmalloc_trace+0x4c/0xb0
[   51.738776]  kmalloc_double_kzfree+0x9d/0x1d0
[   51.739550]  kunit_try_run_case+0x126/0x290
[   51.740515]  kunit_generic_run_threadfn_adapter+0x33/0x50
[   51.741321]  kthread+0x19e/0x1e0
[   51.742038]  ret_from_fork+0x41/0x70
[   51.742613]  ret_from_fork_asm+0x1b/0x30
[   51.743103] 
[   51.743759] Freed by task 228:
[   51.744211]  kasan_save_stack+0x3c/0x60
[   51.744858]  kasan_set_track+0x29/0x40
[   51.745762]  kasan_save_free_info+0x2f/0x50
[   51.746406]  ____kasan_slab_free+0x172/0x1d0
[   51.747657]  __kasan_slab_free+0x16/0x20
[   51.748330]  __kmem_cache_free+0x190/0x310
[   51.749012]  kfree+0x7c/0x120
[   51.749503]  kfree_sensitive+0x67/0x90
[   51.749967]  kmalloc_double_kzfree+0xbd/0x1d0
[   51.750489]  kunit_try_run_case+0x126/0x290
[   51.751167]  kunit_generic_run_threadfn_adapter+0x33/0x50
[   51.751932]  kthread+0x19e/0x1e0
[   51.752337]  ret_from_fork+0x41/0x70
[   51.752948]  ret_from_fork_asm+0x1b/0x30
[   51.753440] 
[   51.753633] The buggy address belongs to the object at ffff888101a81400
[   51.753633]  which belongs to the cache kmalloc-16 of size 16
[   51.754958] The buggy address is located 0 bytes inside of
[   51.754958]  16-byte region [ffff888101a81400, ffff888101a81410)
[   51.755956] 
[   51.756264] The buggy address belongs to the physical page:
[   51.757018] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101a81
[   51.758156] flags: 0x200000000000800(slab|node=0|zone=2)
[   51.758617] page_type: 0xffffffff()
[   51.759185] raw: 0200000000000800 ffff8881000413c0 dead000000000122 0000000000000000
[   51.760052] raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000
[   51.760962] page dumped because: kasan: bad access detected
[   51.761482] 
[   51.761667] Memory state around the buggy address:
[   51.762293]  ffff888101a81300: 00 02 fc fc 00 02 fc fc fa fb fc fc fa fb fc fc
[   51.763206]  ffff888101a81380: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc
[   51.763898] >ffff888101a81400: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   51.764668]                    ^
[   51.765140]  ffff888101a81480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   51.765990]  ffff888101a81500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   51.766636] ==================================================================