[   25.118223] ==================================================================
[   25.118782] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   25.119021] Read of size 16 at addr ffff888104919c20 by task kunit_try_catch/216
[   25.119522] 
[   25.119767] CPU: 0 UID: 0 PID: 216 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc7-next-20250722 #1 PREEMPT(voluntary) 
[   25.119816] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.119838] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.119860] Call Trace:
[   25.119873]  <TASK>
[   25.119888]  dump_stack_lvl+0x73/0xb0
[   25.119917]  print_report+0xd1/0x640
[   25.119940]  ? __virt_addr_valid+0x1db/0x2d0
[   25.119963]  ? kmalloc_uaf_16+0x47b/0x4c0
[   25.119984]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.120010]  ? kmalloc_uaf_16+0x47b/0x4c0
[   25.120031]  kasan_report+0x141/0x180
[   25.120053]  ? kmalloc_uaf_16+0x47b/0x4c0
[   25.120079]  __asan_report_load16_noabort+0x18/0x20
[   25.120103]  kmalloc_uaf_16+0x47b/0x4c0
[   25.120124]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   25.120173]  ? __schedule+0x10da/0x2b60
[   25.120200]  ? __pfx_read_tsc+0x10/0x10
[   25.120222]  ? ktime_get_ts64+0x86/0x230
[   25.120256]  kunit_try_run_case+0x1a5/0x480
[   25.120282]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.120306]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   25.120331]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.120356]  ? __kthread_parkme+0x82/0x180
[   25.120384]  ? preempt_count_sub+0x50/0x80
[   25.120407]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.120432]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.120478]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.120501]  kthread+0x337/0x6f0
[   25.120521]  ? trace_preempt_on+0x20/0xc0
[   25.120543]  ? __pfx_kthread+0x10/0x10
[   25.120564]  ? _raw_spin_unlock_irq+0x47/0x80
[   25.120599]  ? calculate_sigpending+0x7b/0xa0
[   25.120622]  ? __pfx_kthread+0x10/0x10
[   25.120644]  ret_from_fork+0x116/0x1d0
[   25.120674]  ? __pfx_kthread+0x10/0x10
[   25.120696]  ret_from_fork_asm+0x1a/0x30
[   25.120728]  </TASK>
[   25.120739] 
[   25.133170] Allocated by task 216:
[   25.133584]  kasan_save_stack+0x45/0x70
[   25.134023]  kasan_save_track+0x18/0x40
[   25.134410]  kasan_save_alloc_info+0x3b/0x50
[   25.134880]  __kasan_kmalloc+0xb7/0xc0
[   25.135221]  __kmalloc_cache_noprof+0x189/0x420
[   25.135610]  kmalloc_uaf_16+0x15b/0x4c0
[   25.135750]  kunit_try_run_case+0x1a5/0x480
[   25.135906]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.136082]  kthread+0x337/0x6f0
[   25.136340]  ret_from_fork+0x116/0x1d0
[   25.136737]  ret_from_fork_asm+0x1a/0x30
[   25.137247] 
[   25.137406] Freed by task 216:
[   25.137777]  kasan_save_stack+0x45/0x70
[   25.138166]  kasan_save_track+0x18/0x40
[   25.138603]  kasan_save_free_info+0x3f/0x60
[   25.139008]  __kasan_slab_free+0x56/0x70
[   25.139390]  kfree+0x222/0x3f0
[   25.139751]  kmalloc_uaf_16+0x1d6/0x4c0
[   25.140050]  kunit_try_run_case+0x1a5/0x480
[   25.140505]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.140927]  kthread+0x337/0x6f0
[   25.141135]  ret_from_fork+0x116/0x1d0
[   25.141391]  ret_from_fork_asm+0x1a/0x30
[   25.141809] 
[   25.141978] The buggy address belongs to the object at ffff888104919c20
[   25.141978]  which belongs to the cache kmalloc-16 of size 16
[   25.142727] The buggy address is located 0 bytes inside of
[   25.142727]  freed 16-byte region [ffff888104919c20, ffff888104919c30)
[   25.143699] 
[   25.143872] The buggy address belongs to the physical page:
[   25.144280] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104919
[   25.144783] flags: 0x200000000000000(node=0|zone=2)
[   25.145274] page_type: f5(slab)
[   25.145615] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   25.145862] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   25.146090] page dumped because: kasan: bad access detected
[   25.146260] 
[   25.146327] Memory state around the buggy address:
[   25.146484]  ffff888104919b00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   25.146702]  ffff888104919b80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   25.146934] >ffff888104919c00: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc
[   25.147247]                                ^
[   25.147392]  ffff888104919c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.147660]  ffff888104919d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.148115] ==================================================================