[   11.376024] ==================================================================
[   11.376557] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360
[   11.376893] Write of size 33 at addr ffff8881028bc400 by task kunit_try_catch/206
[   11.377212] 
[   11.377315] CPU: 1 UID: 0 PID: 206 Comm: kunit_try_catch Tainted: G    B            N  6.15.8-rc1 #1 PREEMPT(voluntary) 
[   11.377635] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.377650] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.377673] Call Trace:
[   11.377686]  <TASK>
[   11.377703]  dump_stack_lvl+0x73/0xb0
[   11.377730]  print_report+0xd1/0x610
[   11.377752]  ? __virt_addr_valid+0x1db/0x2d0
[   11.377774]  ? kmalloc_uaf_memset+0x1a3/0x360
[   11.377813]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.377836]  ? kmalloc_uaf_memset+0x1a3/0x360
[   11.377857]  kasan_report+0x141/0x180
[   11.377879]  ? kmalloc_uaf_memset+0x1a3/0x360
[   11.378008]  kasan_check_range+0x10c/0x1c0
[   11.378029]  __asan_memset+0x27/0x50
[   11.378048]  kmalloc_uaf_memset+0x1a3/0x360
[   11.378069]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   11.378092]  ? __schedule+0x10c6/0x2b60
[   11.378117]  ? __pfx_read_tsc+0x10/0x10
[   11.378137]  ? ktime_get_ts64+0x86/0x230
[   11.378162]  kunit_try_run_case+0x1a5/0x480
[   11.378183]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.378201]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.378221]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.378258]  ? __kthread_parkme+0x82/0x180
[   11.378280]  ? preempt_count_sub+0x50/0x80
[   11.378304]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.378324]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.378346]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.378382]  kthread+0x337/0x6f0
[   11.378398]  ? trace_preempt_on+0x20/0xc0
[   11.378421]  ? __pfx_kthread+0x10/0x10
[   11.378438]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.378461]  ? calculate_sigpending+0x7b/0xa0
[   11.378482]  ? __pfx_kthread+0x10/0x10
[   11.378501]  ret_from_fork+0x41/0x80
[   11.378521]  ? __pfx_kthread+0x10/0x10
[   11.378539]  ret_from_fork_asm+0x1a/0x30
[   11.378570]  </TASK>
[   11.378581] 
[   11.388624] Allocated by task 206:
[   11.389085]  kasan_save_stack+0x45/0x70
[   11.389304]  kasan_save_track+0x18/0x40
[   11.389507]  kasan_save_alloc_info+0x3b/0x50
[   11.389914]  __kasan_kmalloc+0xb7/0xc0
[   11.390091]  __kmalloc_cache_noprof+0x189/0x420
[   11.390303]  kmalloc_uaf_memset+0xa9/0x360
[   11.390850]  kunit_try_run_case+0x1a5/0x480
[   11.391146]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.391481]  kthread+0x337/0x6f0
[   11.391705]  ret_from_fork+0x41/0x80
[   11.391951]  ret_from_fork_asm+0x1a/0x30
[   11.392144] 
[   11.392216] Freed by task 206:
[   11.392400]  kasan_save_stack+0x45/0x70
[   11.392576]  kasan_save_track+0x18/0x40
[   11.392724]  kasan_save_free_info+0x3f/0x60
[   11.392939]  __kasan_slab_free+0x56/0x70
[   11.393125]  kfree+0x222/0x3f0
[   11.393740]  kmalloc_uaf_memset+0x12b/0x360
[   11.393900]  kunit_try_run_case+0x1a5/0x480
[   11.394508]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.394831]  kthread+0x337/0x6f0
[   11.395146]  ret_from_fork+0x41/0x80
[   11.395335]  ret_from_fork_asm+0x1a/0x30
[   11.395722] 
[   11.395815] The buggy address belongs to the object at ffff8881028bc400
[   11.395815]  which belongs to the cache kmalloc-64 of size 64
[   11.396476] The buggy address is located 0 bytes inside of
[   11.396476]  freed 64-byte region [ffff8881028bc400, ffff8881028bc440)
[   11.397184] 
[   11.397300] The buggy address belongs to the physical page:
[   11.397988] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028bc
[   11.398325] flags: 0x200000000000000(node=0|zone=2)
[   11.398562] page_type: f5(slab)
[   11.398976] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   11.399392] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   11.399804] page dumped because: kasan: bad access detected
[   11.400112] 
[   11.400191] Memory state around the buggy address:
[   11.400397]  ffff8881028bc300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.400861]  ffff8881028bc380: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.401291] >ffff8881028bc400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   11.402060]                    ^
[   11.402392]  ffff8881028bc480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.402975]  ffff8881028bc500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.403619] ==================================================================