[   30.711487] ==================================================================
[   30.711873] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468
[   30.712158] Read of size 1 at addr fff00000c6503828 by task kunit_try_catch/220
[   30.712341] 
[   30.712568] CPU: 0 UID: 0 PID: 220 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT 
[   30.713205] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.713999] Hardware name: linux,dummy-virt (DT)
[   30.714040] Call trace:
[   30.714903]  show_stack+0x20/0x38 (C)
[   30.715414]  dump_stack_lvl+0x8c/0xd0
[   30.715877]  print_report+0x118/0x5d0
[   30.715923]  kasan_report+0xdc/0x128
[   30.715968]  __asan_report_load1_noabort+0x20/0x30
[   30.716018]  kmalloc_uaf2+0x3f4/0x468
[   30.716066]  kunit_try_run_case+0x170/0x3f0
[   30.716114]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.716167]  kthread+0x328/0x630
[   30.716209]  ret_from_fork+0x10/0x20
[   30.716263] 
[   30.716281] Allocated by task 220:
[   30.716310]  kasan_save_stack+0x3c/0x68
[   30.716354]  kasan_save_track+0x20/0x40
[   30.716391]  kasan_save_alloc_info+0x40/0x58
[   30.716429]  __kasan_kmalloc+0xd4/0xd8
[   30.717330]  __kmalloc_cache_noprof+0x16c/0x3c0
[   30.717936]  kmalloc_uaf2+0xc4/0x468
[   30.717977]  kunit_try_run_case+0x170/0x3f0
[   30.718106]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.718248]  kthread+0x328/0x630
[   30.718286]  ret_from_fork+0x10/0x20
[   30.718572] 
[   30.718846] Freed by task 220:
[   30.719113]  kasan_save_stack+0x3c/0x68
[   30.719225]  kasan_save_track+0x20/0x40
[   30.719265]  kasan_save_free_info+0x4c/0x78
[   30.719304]  __kasan_slab_free+0x6c/0x98
[   30.719673]  kfree+0x214/0x3c8
[   30.719723]  kmalloc_uaf2+0x134/0x468
[   30.719965]  kunit_try_run_case+0x170/0x3f0
[   30.720002]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.720144]  kthread+0x328/0x630
[   30.720180]  ret_from_fork+0x10/0x20
[   30.720654] 
[   30.720733] The buggy address belongs to the object at fff00000c6503800
[   30.720733]  which belongs to the cache kmalloc-64 of size 64
[   30.721129] The buggy address is located 40 bytes inside of
[   30.721129]  freed 64-byte region [fff00000c6503800, fff00000c6503840)
[   30.721332] 
[   30.721597] The buggy address belongs to the physical page:
[   30.721664] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106503
[   30.722112] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.722167] page_type: f5(slab)
[   30.722466] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000
[   30.722521] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   30.722573] page dumped because: kasan: bad access detected
[   30.722971] 
[   30.722991] Memory state around the buggy address:
[   30.723222]  fff00000c6503700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   30.723269]  fff00000c6503780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   30.723311] >fff00000c6503800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   30.723349]                                   ^
[   30.723381]  fff00000c6503880: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc
[   30.723422]  fff00000c6503900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   30.723801] ==================================================================

[   24.353421] ==================================================================
[   24.354003] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520
[   24.354279] Read of size 1 at addr ffff8881055e17a8 by task kunit_try_catch/236
[   24.354720] 
[   24.354833] CPU: 1 UID: 0 PID: 236 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT(voluntary) 
[   24.354884] Tainted: [B]=BAD_PAGE, [N]=TEST
[   24.354896] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   24.354919] Call Trace:
[   24.354931]  <TASK>
[   24.354948]  dump_stack_lvl+0x73/0xb0
[   24.354979]  print_report+0xd1/0x610
[   24.355001]  ? __virt_addr_valid+0x1db/0x2d0
[   24.355025]  ? kmalloc_uaf2+0x4a8/0x520
[   24.355045]  ? kasan_complete_mode_report_info+0x64/0x200
[   24.355070]  ? kmalloc_uaf2+0x4a8/0x520
[   24.355090]  kasan_report+0x141/0x180
[   24.355112]  ? kmalloc_uaf2+0x4a8/0x520
[   24.355137]  __asan_report_load1_noabort+0x18/0x20
[   24.355161]  kmalloc_uaf2+0x4a8/0x520
[   24.355181]  ? __pfx_kmalloc_uaf2+0x10/0x10
[   24.355200]  ? finish_task_switch.isra.0+0x153/0x700
[   24.355222]  ? __switch_to+0x47/0xf80
[   24.355250]  ? __schedule+0x10cc/0x2b60
[   24.355271]  ? __pfx_read_tsc+0x10/0x10
[   24.355292]  ? ktime_get_ts64+0x86/0x230
[   24.355317]  kunit_try_run_case+0x1a5/0x480
[   24.355340]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.355361]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   24.355383]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   24.355405]  ? __kthread_parkme+0x82/0x180
[   24.355425]  ? preempt_count_sub+0x50/0x80
[   24.355448]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.355470]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.355496]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   24.355533]  kthread+0x337/0x6f0
[   24.355553]  ? trace_preempt_on+0x20/0xc0
[   24.355576]  ? __pfx_kthread+0x10/0x10
[   24.355597]  ? _raw_spin_unlock_irq+0x47/0x80
[   24.355620]  ? calculate_sigpending+0x7b/0xa0
[   24.355644]  ? __pfx_kthread+0x10/0x10
[   24.355666]  ret_from_fork+0x116/0x1d0
[   24.355684]  ? __pfx_kthread+0x10/0x10
[   24.355704]  ret_from_fork_asm+0x1a/0x30
[   24.355795]  </TASK>
[   24.355810] 
[   24.367109] Allocated by task 236:
[   24.367270]  kasan_save_stack+0x45/0x70
[   24.367456]  kasan_save_track+0x18/0x40
[   24.368021]  kasan_save_alloc_info+0x3b/0x50
[   24.368227]  __kasan_kmalloc+0xb7/0xc0
[   24.368399]  __kmalloc_cache_noprof+0x189/0x420
[   24.368650]  kmalloc_uaf2+0xc6/0x520
[   24.369218]  kunit_try_run_case+0x1a5/0x480
[   24.369659]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.370087]  kthread+0x337/0x6f0
[   24.370266]  ret_from_fork+0x116/0x1d0
[   24.370437]  ret_from_fork_asm+0x1a/0x30
[   24.370669] 
[   24.371145] Freed by task 236:
[   24.371495]  kasan_save_stack+0x45/0x70
[   24.371871]  kasan_save_track+0x18/0x40
[   24.372066]  kasan_save_free_info+0x3f/0x60
[   24.372252]  __kasan_slab_free+0x56/0x70
[   24.372416]  kfree+0x222/0x3f0
[   24.372571]  kmalloc_uaf2+0x14c/0x520
[   24.373201]  kunit_try_run_case+0x1a5/0x480
[   24.373399]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.373876]  kthread+0x337/0x6f0
[   24.374182]  ret_from_fork+0x116/0x1d0
[   24.374367]  ret_from_fork_asm+0x1a/0x30
[   24.374549] 
[   24.374941] The buggy address belongs to the object at ffff8881055e1780
[   24.374941]  which belongs to the cache kmalloc-64 of size 64
[   24.375442] The buggy address is located 40 bytes inside of
[   24.375442]  freed 64-byte region [ffff8881055e1780, ffff8881055e17c0)
[   24.376767] 
[   24.377014] The buggy address belongs to the physical page:
[   24.377339] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055e1
[   24.378165] flags: 0x200000000000000(node=0|zone=2)
[   24.378471] page_type: f5(slab)
[   24.378898] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   24.379219] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   24.379534] page dumped because: kasan: bad access detected
[   24.380267] 
[   24.380464] Memory state around the buggy address:
[   24.380999]  ffff8881055e1680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   24.381453]  ffff8881055e1700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   24.381978] >ffff8881055e1780: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   24.382266]                                   ^
[   24.382454]  ffff8881055e1800: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc
[   24.382958]  ffff8881055e1880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.383974] ==================================================================