[   25.750228] ==================================================================
[   25.750657] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0
[   25.750983] Read of size 16 at addr ffff8881057d7620 by task kunit_try_catch/217
[   25.751605] 
[   25.751736] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) 
[   25.751838] Tainted: [B]=BAD_PAGE, [N]=TEST
[   25.751853] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   25.751872] Call Trace:
[   25.751885]  <TASK>
[   25.751900]  dump_stack_lvl+0x73/0xb0
[   25.751930]  print_report+0xd1/0x640
[   25.751966]  ? __virt_addr_valid+0x1db/0x2d0
[   25.751990]  ? kmalloc_uaf_16+0x47b/0x4c0
[   25.752010]  ? kasan_complete_mode_report_info+0x64/0x200
[   25.752037]  ? kmalloc_uaf_16+0x47b/0x4c0
[   25.752069]  kasan_report+0x141/0x180
[   25.752091]  ? kmalloc_uaf_16+0x47b/0x4c0
[   25.752117]  __asan_report_load16_noabort+0x18/0x20
[   25.752142]  kmalloc_uaf_16+0x47b/0x4c0
[   25.752164]  ? __pfx_kmalloc_uaf_16+0x10/0x10
[   25.752186]  ? __schedule+0x10da/0x2b60
[   25.752208]  ? __pfx_read_tsc+0x10/0x10
[   25.752229]  ? ktime_get_ts64+0x86/0x230
[   25.752254]  kunit_try_run_case+0x1a5/0x480
[   25.752278]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.752303]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   25.752325]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   25.752351]  ? __kthread_parkme+0x82/0x180
[   25.752372]  ? preempt_count_sub+0x50/0x80
[   25.752395]  ? __pfx_kunit_try_run_case+0x10/0x10
[   25.752419]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.752443]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   25.752468]  kthread+0x337/0x6f0
[   25.752489]  ? trace_preempt_on+0x20/0xc0
[   25.752515]  ? __pfx_kthread+0x10/0x10
[   25.752537]  ? _raw_spin_unlock_irq+0x47/0x80
[   25.752562]  ? calculate_sigpending+0x7b/0xa0
[   25.752586]  ? __pfx_kthread+0x10/0x10
[   25.752608]  ret_from_fork+0x116/0x1d0
[   25.752628]  ? __pfx_kthread+0x10/0x10
[   25.752650]  ret_from_fork_asm+0x1a/0x30
[   25.752681]  </TASK>
[   25.752692] 
[   25.760014] Allocated by task 217:
[   25.760148]  kasan_save_stack+0x45/0x70
[   25.760293]  kasan_save_track+0x18/0x40
[   25.760602]  kasan_save_alloc_info+0x3b/0x50
[   25.760813]  __kasan_kmalloc+0xb7/0xc0
[   25.761007]  __kmalloc_cache_noprof+0x189/0x420
[   25.761506]  kmalloc_uaf_16+0x15b/0x4c0
[   25.761679]  kunit_try_run_case+0x1a5/0x480
[   25.761941]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.762129]  kthread+0x337/0x6f0
[   25.762248]  ret_from_fork+0x116/0x1d0
[   25.762380]  ret_from_fork_asm+0x1a/0x30
[   25.762635] 
[   25.762726] Freed by task 217:
[   25.762842]  kasan_save_stack+0x45/0x70
[   25.763031]  kasan_save_track+0x18/0x40
[   25.763223]  kasan_save_free_info+0x3f/0x60
[   25.763424]  __kasan_slab_free+0x5e/0x80
[   25.763566]  kfree+0x222/0x3f0
[   25.763684]  kmalloc_uaf_16+0x1d6/0x4c0
[   25.763820]  kunit_try_run_case+0x1a5/0x480
[   25.763978]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   25.764437]  kthread+0x337/0x6f0
[   25.764630]  ret_from_fork+0x116/0x1d0
[   25.765032]  ret_from_fork_asm+0x1a/0x30
[   25.765252] 
[   25.765348] The buggy address belongs to the object at ffff8881057d7620
[   25.765348]  which belongs to the cache kmalloc-16 of size 16
[   25.766026] The buggy address is located 0 bytes inside of
[   25.766026]  freed 16-byte region [ffff8881057d7620, ffff8881057d7630)
[   25.766533] 
[   25.766621] The buggy address belongs to the physical page:
[   25.766914] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057d7
[   25.767272] flags: 0x200000000000000(node=0|zone=2)
[   25.767455] page_type: f5(slab)
[   25.767585] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000
[   25.768112] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000
[   25.768475] page dumped because: kasan: bad access detected
[   25.768724] 
[   25.768797] Memory state around the buggy address:
[   25.769614]  ffff8881057d7500: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   25.770420]  ffff8881057d7580: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
[   25.770756] >ffff8881057d7600: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc
[   25.771037]                                ^
[   25.771644]  ffff8881057d7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.772149]  ffff8881057d7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.772444] ==================================================================