[   26.876265] ==================================================================
[   26.876727] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   26.877555] Read of size 16 at addr ffff8881022a2680 by task kunit_try_catch/197
[   26.878052] 
[   26.878664] CPU: 1 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) 
[   26.878916] Tainted: [B]=BAD_PAGE, [N]=TEST
[   26.878944] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   26.878977] Call Trace:
[   26.878995]  <TASK>
[   26.879020]  dump_stack_lvl+0x73/0xb0
[   26.879068]  print_report+0xd1/0x650
[   26.879094]  ? __virt_addr_valid+0x1db/0x2d0
[   26.879142]  ? kmalloc_uaf_16+0x47b/0x4c0
[   26.879164]  ? kasan_complete_mode_report_info+0x64/0x200
[   26.879191]  ? kmalloc_uaf_16+0x47b/0x4c0
[   26.879213]  kasan_report+0x141/0x180
[   26.879236]  ? kmalloc_uaf_16+0x47b/0x4c0
[   26.879262]  __asan_report_load16_noabort+0x18/0x20
[   26.879287]  kmalloc_uaf_16+0x47b/0x4c0
[   26.879309]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   26.879332]  ? __schedule+0x10cc/0x2b60
[   26.879356]  ? __pfx_read_tsc+0x10/0x10
[   26.879379]  ? ktime_get_ts64+0x86/0x230
[   26.879406]  kunit_try_run_case+0x1a5/0x480
[   26.879433]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.879456]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   26.879479]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   26.879503]  ? __kthread_parkme+0x82/0x180
[   26.879525]  ? preempt_count_sub+0x50/0x80
[   26.879551]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.879574]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.879598]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   26.879622]  kthread+0x337/0x6f0
[   26.879642]  ? trace_preempt_on+0x20/0xc0
[   26.879667]  ? __pfx_kthread+0x10/0x10
[   26.879689]  ? _raw_spin_unlock_irq+0x47/0x80
[   26.879711]  ? calculate_sigpending+0x7b/0xa0
[   26.879736]  ? __pfx_kthread+0x10/0x10
[   26.879758]  ret_from_fork+0x116/0x1d0
[   26.879779]  ? __pfx_kthread+0x10/0x10
[   26.879800]  ret_from_fork_asm+0x1a/0x30
[   26.879831]  </TASK>
[   26.879844] 
[   26.889383] Allocated by task 197:
[   26.889703]  kasan_save_stack+0x45/0x70
[   26.890509]  kasan_save_track+0x18/0x40
[   26.890770]  kasan_save_alloc_info+0x3b/0x50
[   26.891144]  __kasan_kmalloc+0xb7/0xc0
[   26.891684]  __kmalloc_cache_noprof+0x189/0x420
[   26.891891]  kmalloc_uaf_16+0x15b/0x4c0
[   26.892325]  kunit_try_run_case+0x1a5/0x480
[   26.892717]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.892990]  kthread+0x337/0x6f0
[   26.893181]  ret_from_fork+0x116/0x1d0
[   26.893503]  ret_from_fork_asm+0x1a/0x30
[   26.893844] 
[   26.894021] Freed by task 197:
[   26.894351]  kasan_save_stack+0x45/0x70
[   26.894590]  kasan_save_track+0x18/0x40
[   26.894777]  kasan_save_free_info+0x3f/0x60
[   26.895036]  __kasan_slab_free+0x56/0x70
[   26.895389]  kfree+0x222/0x3f0
[   26.895669]  kmalloc_uaf_16+0x1d6/0x4c0
[   26.896038]  kunit_try_run_case+0x1a5/0x480
[   26.896431]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.896726]  kthread+0x337/0x6f0
[   26.896934]  ret_from_fork+0x116/0x1d0
[   26.897282]  ret_from_fork_asm+0x1a/0x30
[   26.897612] 
[   26.897792] The buggy address belongs to the object at ffff8881022a2680
[   26.897792]  which belongs to the cache kmalloc-16 of size 16
[   26.898785] The buggy address is located 0 bytes inside of
[   26.898785]  freed 16-byte region [ffff8881022a2680, ffff8881022a2690)
[   26.899770] 
[   26.900011] The buggy address belongs to the physical page:
[   26.900516] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1022a2
[   26.901122] flags: 0x200000000000000(node=0|zone=2)
[   26.901572] page_type: f5(slab)
[   26.901886] raw: 0200000000000000 ffff888100041640 dead000000000100 dead000000000122
[   26.902335] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   26.902734] page dumped because: kasan: bad access detected
[   26.903554] 
[   26.903675] Memory state around the buggy address:
[   26.904552]  ffff8881022a2580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   26.904917]  ffff8881022a2600: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
[   26.905174] >ffff8881022a2680: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.905505]                    ^
[   26.905691]  ffff8881022a2700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.906895]  ffff8881022a2780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.907163] ==================================================================