[   11.239748] ==================================================================
[   11.240581] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380
[   11.240890] Read of size 1 at addr ffff888101e622e8 by task kunit_try_catch/202
[   11.241199] 
[   11.241291] CPU: 1 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G    B            N  6.15.0-rc7-next-20250526 #1 PREEMPT(voluntary) 
[   11.241336] Tainted: [B]=BAD_PAGE, [N]=TEST
[   11.241348] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   11.241368] Call Trace:
[   11.241392]  <TASK>
[   11.241407]  dump_stack_lvl+0x73/0xb0
[   11.241433]  print_report+0xd1/0x650
[   11.241456]  ? __virt_addr_valid+0x1db/0x2d0
[   11.241477]  ? kmalloc_uaf+0x320/0x380
[   11.241497]  ? kasan_complete_mode_report_info+0x64/0x200
[   11.241519]  ? kmalloc_uaf+0x320/0x380
[   11.241539]  kasan_report+0x141/0x180
[   11.241561]  ? kmalloc_uaf+0x320/0x380
[   11.241586]  __asan_report_load1_noabort+0x18/0x20
[   11.241606]  kmalloc_uaf+0x320/0x380
[   11.241626]  ? __pfx_kmalloc_uaf+0x10/0x10
[   11.241647]  ? __schedule+0x10cc/0x2b60
[   11.241671]  ? __pfx_read_tsc+0x10/0x10
[   11.241691]  ? ktime_get_ts64+0x86/0x230
[   11.241725]  kunit_try_run_case+0x1a5/0x480
[   11.241745]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.241764]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   11.241788]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   11.241812]  ? __kthread_parkme+0x82/0x180
[   11.241832]  ? preempt_count_sub+0x50/0x80
[   11.241854]  ? __pfx_kunit_try_run_case+0x10/0x10
[   11.241875]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.241898]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   11.241922]  kthread+0x337/0x6f0
[   11.241940]  ? trace_preempt_on+0x20/0xc0
[   11.241963]  ? __pfx_kthread+0x10/0x10
[   11.241983]  ? _raw_spin_unlock_irq+0x47/0x80
[   11.242005]  ? calculate_sigpending+0x7b/0xa0
[   11.242035]  ? __pfx_kthread+0x10/0x10
[   11.242055]  ret_from_fork+0x116/0x1d0
[   11.242073]  ? __pfx_kthread+0x10/0x10
[   11.242093]  ret_from_fork_asm+0x1a/0x30
[   11.242123]  </TASK>
[   11.242133] 
[   11.248804] Allocated by task 202:
[   11.248937]  kasan_save_stack+0x45/0x70
[   11.249141]  kasan_save_track+0x18/0x40
[   11.249347]  kasan_save_alloc_info+0x3b/0x50
[   11.249563]  __kasan_kmalloc+0xb7/0xc0
[   11.249790]  __kmalloc_cache_noprof+0x189/0x420
[   11.249965]  kmalloc_uaf+0xaa/0x380
[   11.250097]  kunit_try_run_case+0x1a5/0x480
[   11.250240]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.250424]  kthread+0x337/0x6f0
[   11.250599]  ret_from_fork+0x116/0x1d0
[   11.250890]  ret_from_fork_asm+0x1a/0x30
[   11.251095] 
[   11.251196] Freed by task 202:
[   11.251357]  kasan_save_stack+0x45/0x70
[   11.251558]  kasan_save_track+0x18/0x40
[   11.251797]  kasan_save_free_info+0x3f/0x60
[   11.252005]  __kasan_slab_free+0x56/0x70
[   11.252203]  kfree+0x222/0x3f0
[   11.252341]  kmalloc_uaf+0x12c/0x380
[   11.252481]  kunit_try_run_case+0x1a5/0x480
[   11.252627]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   11.252809]  kthread+0x337/0x6f0
[   11.252938]  ret_from_fork+0x116/0x1d0
[   11.253127]  ret_from_fork_asm+0x1a/0x30
[   11.253501] 
[   11.253600] The buggy address belongs to the object at ffff888101e622e0
[   11.253600]  which belongs to the cache kmalloc-16 of size 16
[   11.254138] The buggy address is located 8 bytes inside of
[   11.254138]  freed 16-byte region [ffff888101e622e0, ffff888101e622f0)
[   11.254686] 
[   11.254759] The buggy address belongs to the physical page:
[   11.254929] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101e62
[   11.255193] flags: 0x200000000000000(node=0|zone=2)
[   11.255434] page_type: f5(slab)
[   11.255604] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   11.256124] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   11.256392] page dumped because: kasan: bad access detected
[   11.256650] 
[   11.256761] Memory state around the buggy address:
[   11.256952]  ffff888101e62180: 00 00 fc fc 00 02 fc fc 00 02 fc fc 00 06 fc fc
[   11.257247]  ffff888101e62200: 00 06 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   11.257551] >ffff888101e62280: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   11.257918]                                                           ^
[   11.258173]  ffff888101e62300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.258427]  ffff888101e62380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   11.258681] ==================================================================