[   17.770626] ==================================================================
[   17.772118] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350
[   17.772972] Read of size 1 at addr ffff888102175280 by task kunit_try_catch/213
[   17.773559] 
[   17.773859] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc1 #1 PREEMPT(voluntary) 
[   17.773978] Tainted: [B]=BAD_PAGE, [N]=TEST
[   17.774013] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   17.774067] Call Trace:
[   17.774107]  <TASK>
[   17.774155]  dump_stack_lvl+0x73/0xb0
[   17.774236]  print_report+0xd1/0x650
[   17.774313]  ? __virt_addr_valid+0x1db/0x2d0
[   17.774388]  ? kmalloc_double_kzfree+0x19c/0x350
[   17.774458]  ? kasan_complete_mode_report_info+0x64/0x200
[   17.774533]  ? kmalloc_double_kzfree+0x19c/0x350
[   17.774601]  kasan_report+0x141/0x180
[   17.775017]  ? kmalloc_double_kzfree+0x19c/0x350
[   17.775054]  ? kmalloc_double_kzfree+0x19c/0x350
[   17.775085]  __kasan_check_byte+0x3d/0x50
[   17.775119]  kfree_sensitive+0x22/0x90
[   17.775156]  kmalloc_double_kzfree+0x19c/0x350
[   17.775185]  ? __pfx_kmalloc_double_kzfree+0x10/0x10
[   17.775239]  ? __schedule+0x10cc/0x2b60
[   17.775289]  ? __pfx_read_tsc+0x10/0x10
[   17.775322]  ? ktime_get_ts64+0x86/0x230
[   17.775359]  kunit_try_run_case+0x1a5/0x480
[   17.775397]  ? __pfx_kunit_try_run_case+0x10/0x10
[   17.775431]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   17.775467]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   17.775502]  ? __kthread_parkme+0x82/0x180
[   17.775535]  ? preempt_count_sub+0x50/0x80
[   17.775570]  ? __pfx_kunit_try_run_case+0x10/0x10
[   17.775666]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   17.775750]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   17.775787]  kthread+0x337/0x6f0
[   17.775814]  ? trace_preempt_on+0x20/0xc0
[   17.775848]  ? __pfx_kthread+0x10/0x10
[   17.775872]  ? _raw_spin_unlock_irq+0x47/0x80
[   17.775902]  ? calculate_sigpending+0x7b/0xa0
[   17.775932]  ? __pfx_kthread+0x10/0x10
[   17.775956]  ret_from_fork+0x41/0x80
[   17.775986]  ? __pfx_kthread+0x10/0x10
[   17.776011]  ret_from_fork_asm+0x1a/0x30
[   17.776053]  </TASK>
[   17.776067] 
[   17.793262] Allocated by task 213:
[   17.793842]  kasan_save_stack+0x45/0x70
[   17.794275]  kasan_save_track+0x18/0x40
[   17.794881]  kasan_save_alloc_info+0x3b/0x50
[   17.795376]  __kasan_kmalloc+0xb7/0xc0
[   17.795932]  __kmalloc_cache_noprof+0x189/0x420
[   17.796399]  kmalloc_double_kzfree+0xa9/0x350
[   17.797118]  kunit_try_run_case+0x1a5/0x480
[   17.797574]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   17.798279]  kthread+0x337/0x6f0
[   17.798785]  ret_from_fork+0x41/0x80
[   17.799204]  ret_from_fork_asm+0x1a/0x30
[   17.799576] 
[   17.799836] Freed by task 213:
[   17.800135]  kasan_save_stack+0x45/0x70
[   17.800533]  kasan_save_track+0x18/0x40
[   17.801196]  kasan_save_free_info+0x3f/0x60
[   17.801810]  __kasan_slab_free+0x56/0x70
[   17.802130]  kfree+0x222/0x3f0
[   17.802446]  kfree_sensitive+0x67/0x90
[   17.803005]  kmalloc_double_kzfree+0x12b/0x350
[   17.803499]  kunit_try_run_case+0x1a5/0x480
[   17.804070]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   17.804586]  kthread+0x337/0x6f0
[   17.805274]  ret_from_fork+0x41/0x80
[   17.805822]  ret_from_fork_asm+0x1a/0x30
[   17.806286] 
[   17.806518] The buggy address belongs to the object at ffff888102175280
[   17.806518]  which belongs to the cache kmalloc-16 of size 16
[   17.807439] The buggy address is located 0 bytes inside of
[   17.807439]  freed 16-byte region [ffff888102175280, ffff888102175290)
[   17.808378] 
[   17.808562] The buggy address belongs to the physical page:
[   17.809438] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102175
[   17.810300] flags: 0x200000000000000(node=0|zone=2)
[   17.810822] page_type: f5(slab)
[   17.811113] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   17.811802] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   17.812471] page dumped because: kasan: bad access detected
[   17.813440] 
[   17.813658] Memory state around the buggy address:
[   17.814149]  ffff888102175180: 00 04 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc
[   17.814881]  ffff888102175200: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   17.815392] >ffff888102175280: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.816132]                    ^
[   17.816528]  ffff888102175300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.817554]  ffff888102175380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   17.818184] ==================================================================