[   30.621818] ==================================================================
[   30.621921] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468
[   30.623896] Read of size 1 at addr fff00000c9ac9ba8 by task kunit_try_catch/219
[   30.624263] 
[   30.624418] CPU: 1 UID: 0 PID: 219 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5-next-20250711 #1 PREEMPT 
[   30.625426] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.625509] Hardware name: linux,dummy-virt (DT)
[   30.626292] Call trace:
[   30.626334]  show_stack+0x20/0x38 (C)
[   30.626725]  dump_stack_lvl+0x8c/0xd0
[   30.627277]  print_report+0x118/0x5d0
[   30.627677]  kasan_report+0xdc/0x128
[   30.628340]  __asan_report_load1_noabort+0x20/0x30
[   30.629117]  kmalloc_uaf2+0x3f4/0x468
[   30.629820]  kunit_try_run_case+0x170/0x3f0
[   30.630083]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.630652]  kthread+0x328/0x630
[   30.631072]  ret_from_fork+0x10/0x20
[   30.631672] 
[   30.631820] Allocated by task 219:
[   30.632084]  kasan_save_stack+0x3c/0x68
[   30.632434]  kasan_save_track+0x20/0x40
[   30.632477]  kasan_save_alloc_info+0x40/0x58
[   30.633137]  __kasan_kmalloc+0xd4/0xd8
[   30.633654]  __kmalloc_cache_noprof+0x16c/0x3c0
[   30.634280]  kmalloc_uaf2+0xc4/0x468
[   30.634696]  kunit_try_run_case+0x170/0x3f0
[   30.635085]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.635819]  kthread+0x328/0x630
[   30.635989]  ret_from_fork+0x10/0x20
[   30.636421] 
[   30.636444] Freed by task 219:
[   30.636819]  kasan_save_stack+0x3c/0x68
[   30.636871]  kasan_save_track+0x20/0x40
[   30.637654]  kasan_save_free_info+0x4c/0x78
[   30.638151]  __kasan_slab_free+0x6c/0x98
[   30.638446]  kfree+0x214/0x3c8
[   30.638568]  kmalloc_uaf2+0x134/0x468
[   30.639122]  kunit_try_run_case+0x170/0x3f0
[   30.639180]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.639223]  kthread+0x328/0x630
[   30.639899]  ret_from_fork+0x10/0x20
[   30.640438] 
[   30.640464] The buggy address belongs to the object at fff00000c9ac9b80
[   30.640464]  which belongs to the cache kmalloc-64 of size 64
[   30.640919] The buggy address is located 40 bytes inside of
[   30.640919]  freed 64-byte region [fff00000c9ac9b80, fff00000c9ac9bc0)
[   30.640990] 
[   30.641012] The buggy address belongs to the physical page:
[   30.641046] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109ac9
[   30.641107] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.641161] page_type: f5(slab)
[   30.642661] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000
[   30.643477] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   30.643767] page dumped because: kasan: bad access detected
[   30.643840] 
[   30.643859] Memory state around the buggy address:
[   30.644535]  fff00000c9ac9a80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   30.644594]  fff00000c9ac9b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   30.645253] >fff00000c9ac9b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   30.645494]                                   ^
[   30.645803]  fff00000c9ac9c00: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc
[   30.645872]  fff00000c9ac9c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.645945] ==================================================================

[   24.082125] ==================================================================
[   24.082704] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520
[   24.083101] Read of size 1 at addr ffff888104cb3c28 by task kunit_try_catch/238
[   24.083376] 
[   24.083491] CPU: 0 UID: 0 PID: 238 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc5-next-20250711 #1 PREEMPT(voluntary) 
[   24.083606] Tainted: [B]=BAD_PAGE, [N]=TEST
[   24.083619] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   24.083641] Call Trace:
[   24.083655]  <TASK>
[   24.083672]  dump_stack_lvl+0x73/0xb0
[   24.083704]  print_report+0xd1/0x610
[   24.083726]  ? __virt_addr_valid+0x1db/0x2d0
[   24.083765]  ? kmalloc_uaf2+0x4a8/0x520
[   24.083784]  ? kasan_complete_mode_report_info+0x64/0x200
[   24.083809]  ? kmalloc_uaf2+0x4a8/0x520
[   24.083830]  kasan_report+0x141/0x180
[   24.083851]  ? kmalloc_uaf2+0x4a8/0x520
[   24.083875]  __asan_report_load1_noabort+0x18/0x20
[   24.083898]  kmalloc_uaf2+0x4a8/0x520
[   24.083919]  ? __pfx_kmalloc_uaf2+0x10/0x10
[   24.083938]  ? finish_task_switch.isra.0+0x153/0x700
[   24.083960]  ? __switch_to+0x47/0xf80
[   24.083987]  ? __schedule+0x10cc/0x2b60
[   24.084011]  ? __pfx_read_tsc+0x10/0x10
[   24.084032]  ? ktime_get_ts64+0x86/0x230
[   24.084057]  kunit_try_run_case+0x1a5/0x480
[   24.084079]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.084100]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   24.084123]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   24.084146]  ? __kthread_parkme+0x82/0x180
[   24.084166]  ? preempt_count_sub+0x50/0x80
[   24.084189]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.084210]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.084235]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   24.084259]  kthread+0x337/0x6f0
[   24.084325]  ? trace_preempt_on+0x20/0xc0
[   24.084350]  ? __pfx_kthread+0x10/0x10
[   24.084370]  ? _raw_spin_unlock_irq+0x47/0x80
[   24.084392]  ? calculate_sigpending+0x7b/0xa0
[   24.084425]  ? __pfx_kthread+0x10/0x10
[   24.084446]  ret_from_fork+0x116/0x1d0
[   24.084465]  ? __pfx_kthread+0x10/0x10
[   24.084486]  ret_from_fork_asm+0x1a/0x30
[   24.084517]  </TASK>
[   24.084528] 
[   24.091831] Allocated by task 238:
[   24.091954]  kasan_save_stack+0x45/0x70
[   24.092092]  kasan_save_track+0x18/0x40
[   24.092325]  kasan_save_alloc_info+0x3b/0x50
[   24.092706]  __kasan_kmalloc+0xb7/0xc0
[   24.092898]  __kmalloc_cache_noprof+0x189/0x420
[   24.093117]  kmalloc_uaf2+0xc6/0x520
[   24.093422]  kunit_try_run_case+0x1a5/0x480
[   24.093623]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.093850]  kthread+0x337/0x6f0
[   24.094014]  ret_from_fork+0x116/0x1d0
[   24.094175]  ret_from_fork_asm+0x1a/0x30
[   24.094438] 
[   24.094508] Freed by task 238:
[   24.094656]  kasan_save_stack+0x45/0x70
[   24.094836]  kasan_save_track+0x18/0x40
[   24.095002]  kasan_save_free_info+0x3f/0x60
[   24.095186]  __kasan_slab_free+0x56/0x70
[   24.095487]  kfree+0x222/0x3f0
[   24.095636]  kmalloc_uaf2+0x14c/0x520
[   24.095774]  kunit_try_run_case+0x1a5/0x480
[   24.095911]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.096078]  kthread+0x337/0x6f0
[   24.096192]  ret_from_fork+0x116/0x1d0
[   24.096354]  ret_from_fork_asm+0x1a/0x30
[   24.096543] 
[   24.096634] The buggy address belongs to the object at ffff888104cb3c00
[   24.096634]  which belongs to the cache kmalloc-64 of size 64
[   24.097172] The buggy address is located 40 bytes inside of
[   24.097172]  freed 64-byte region [ffff888104cb3c00, ffff888104cb3c40)
[   24.097748] 
[   24.097826] The buggy address belongs to the physical page:
[   24.097997] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104cb3
[   24.098399] flags: 0x200000000000000(node=0|zone=2)
[   24.098720] page_type: f5(slab)
[   24.098896] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   24.099229] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   24.099700] page dumped because: kasan: bad access detected
[   24.099951] 
[   24.100027] Memory state around the buggy address:
[   24.100218]  ffff888104cb3b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   24.100675]  ffff888104cb3b80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   24.100981] >ffff888104cb3c00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   24.101219]                                   ^
[   24.101771]  ffff888104cb3c80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc
[   24.101993]  ffff888104cb3d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.102197] ==================================================================