[   29.987224] ==================================================================
[   29.987311] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8
[   29.987385] Read of size 8 at addr fff00000c9aded80 by task kunit_try_catch/231
[   29.987444] 
[   29.987483] CPU: 0 UID: 0 PID: 231 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250714 #1 PREEMPT 
[   29.987581] Tainted: [B]=BAD_PAGE, [N]=TEST
[   29.987610] Hardware name: linux,dummy-virt (DT)
[   29.987658] Call trace:
[   29.987683]  show_stack+0x20/0x38 (C)
[   29.987733]  dump_stack_lvl+0x8c/0xd0
[   29.987778]  print_report+0x118/0x5d0
[   29.987822]  kasan_report+0xdc/0x128
[   29.987864]  __asan_report_load8_noabort+0x20/0x30
[   29.987913]  workqueue_uaf+0x480/0x4a8
[   29.987960]  kunit_try_run_case+0x170/0x3f0
[   29.988016]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   29.988081]  kthread+0x328/0x630
[   29.988121]  ret_from_fork+0x10/0x20
[   29.988170] 
[   29.988215] Allocated by task 231:
[   29.988261]  kasan_save_stack+0x3c/0x68
[   29.988402]  kasan_save_track+0x20/0x40
[   29.988649]  kasan_save_alloc_info+0x40/0x58
[   29.988734]  __kasan_kmalloc+0xd4/0xd8
[   29.988774]  __kmalloc_cache_noprof+0x16c/0x3c0
[   29.988817]  workqueue_uaf+0x13c/0x4a8
[   29.988854]  kunit_try_run_case+0x170/0x3f0
[   29.988922]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   29.988966]  kthread+0x328/0x630
[   29.989082]  ret_from_fork+0x10/0x20
[   29.989128] 
[   29.989147] Freed by task 75:
[   29.989173]  kasan_save_stack+0x3c/0x68
[   29.989212]  kasan_save_track+0x20/0x40
[   29.989250]  kasan_save_free_info+0x4c/0x78
[   29.989288]  __kasan_slab_free+0x6c/0x98
[   29.989327]  kfree+0x214/0x3c8
[   29.989404]  workqueue_uaf_work+0x18/0x30
[   29.989535]  process_one_work+0x530/0xf98
[   29.989574]  worker_thread+0x618/0xf38
[   29.989725]  kthread+0x328/0x630
[   29.989758]  ret_from_fork+0x10/0x20
[   29.989860] 
[   29.989921] Last potentially related work creation:
[   29.989964]  kasan_save_stack+0x3c/0x68
[   29.990134]  kasan_record_aux_stack+0xb4/0xc8
[   29.990222]  __queue_work+0x65c/0xfe0
[   29.990379]  queue_work_on+0xbc/0xf8
[   29.990512]  workqueue_uaf+0x210/0x4a8
[   29.990559]  kunit_try_run_case+0x170/0x3f0
[   29.990610]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   29.990651]  kthread+0x328/0x630
[   29.990682]  ret_from_fork+0x10/0x20
[   29.990718] 
[   29.990908] The buggy address belongs to the object at fff00000c9aded80
[   29.990908]  which belongs to the cache kmalloc-32 of size 32
[   29.991005] The buggy address is located 0 bytes inside of
[   29.991005]  freed 32-byte region [fff00000c9aded80, fff00000c9adeda0)
[   29.991165] 
[   29.991271] The buggy address belongs to the physical page:
[   29.991360] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109ade
[   29.991429] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   29.991552] page_type: f5(slab)
[   29.991675] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   29.991788] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   29.991888] page dumped because: kasan: bad access detected
[   29.991939] 
[   29.991956] Memory state around the buggy address:
[   29.991991]  fff00000c9adec80: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   29.992034]  fff00000c9aded00: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc
[   29.992086] >fff00000c9aded80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   29.992324]                    ^
[   29.992415]  fff00000c9adee00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   29.992485]  fff00000c9adee80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   29.992587] ==================================================================

[   24.894324] ==================================================================
[   24.894825] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560
[   24.895351] Read of size 8 at addr ffff888103ea5c00 by task kunit_try_catch/249
[   24.895611] 
[   24.895712] CPU: 0 UID: 0 PID: 249 Comm: kunit_try_catch Tainted: G    B   W        N  6.16.0-rc6-next-20250714 #1 PREEMPT(voluntary) 
[   24.895773] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST
[   24.895786] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   24.895810] Call Trace:
[   24.895822]  <TASK>
[   24.895841]  dump_stack_lvl+0x73/0xb0
[   24.895874]  print_report+0xd1/0x610
[   24.895897]  ? __virt_addr_valid+0x1db/0x2d0
[   24.895922]  ? workqueue_uaf+0x4d6/0x560
[   24.895942]  ? kasan_complete_mode_report_info+0x64/0x200
[   24.895967]  ? workqueue_uaf+0x4d6/0x560
[   24.895988]  kasan_report+0x141/0x180
[   24.896008]  ? workqueue_uaf+0x4d6/0x560
[   24.896033]  __asan_report_load8_noabort+0x18/0x20
[   24.896056]  workqueue_uaf+0x4d6/0x560
[   24.896077]  ? __pfx_workqueue_uaf+0x10/0x10
[   24.896098]  ? __schedule+0x10cc/0x2b60
[   24.896122]  ? __pfx_read_tsc+0x10/0x10
[   24.896143]  ? ktime_get_ts64+0x86/0x230
[   24.896168]  kunit_try_run_case+0x1a5/0x480
[   24.896190]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.896209]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   24.896232]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   24.896254]  ? __kthread_parkme+0x82/0x180
[   24.896276]  ? preempt_count_sub+0x50/0x80
[   24.896298]  ? __pfx_kunit_try_run_case+0x10/0x10
[   24.896345]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.896371]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   24.896396]  kthread+0x337/0x6f0
[   24.896415]  ? trace_preempt_on+0x20/0xc0
[   24.896438]  ? __pfx_kthread+0x10/0x10
[   24.896458]  ? _raw_spin_unlock_irq+0x47/0x80
[   24.896479]  ? calculate_sigpending+0x7b/0xa0
[   24.896502]  ? __pfx_kthread+0x10/0x10
[   24.896523]  ret_from_fork+0x116/0x1d0
[   24.896541]  ? __pfx_kthread+0x10/0x10
[   24.896561]  ret_from_fork_asm+0x1a/0x30
[   24.896591]  </TASK>
[   24.896602] 
[   24.906737] Allocated by task 249:
[   24.907346]  kasan_save_stack+0x45/0x70
[   24.907634]  kasan_save_track+0x18/0x40
[   24.907887]  kasan_save_alloc_info+0x3b/0x50
[   24.908212]  __kasan_kmalloc+0xb7/0xc0
[   24.908394]  __kmalloc_cache_noprof+0x189/0x420
[   24.908717]  workqueue_uaf+0x152/0x560
[   24.908922]  kunit_try_run_case+0x1a5/0x480
[   24.909311]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.909615]  kthread+0x337/0x6f0
[   24.909772]  ret_from_fork+0x116/0x1d0
[   24.910117]  ret_from_fork_asm+0x1a/0x30
[   24.910271] 
[   24.910336] Freed by task 9:
[   24.910593]  kasan_save_stack+0x45/0x70
[   24.910953]  kasan_save_track+0x18/0x40
[   24.911337]  kasan_save_free_info+0x3f/0x60
[   24.911741]  __kasan_slab_free+0x56/0x70
[   24.912164]  kfree+0x222/0x3f0
[   24.912492]  workqueue_uaf_work+0x12/0x20
[   24.912993]  process_one_work+0x5ee/0xf60
[   24.913278]  worker_thread+0x758/0x1220
[   24.913562]  kthread+0x337/0x6f0
[   24.913901]  ret_from_fork+0x116/0x1d0
[   24.914057]  ret_from_fork_asm+0x1a/0x30
[   24.914488] 
[   24.914667] Last potentially related work creation:
[   24.914955]  kasan_save_stack+0x45/0x70
[   24.915081]  kasan_record_aux_stack+0xb2/0xc0
[   24.915376]  __queue_work+0x61a/0xe70
[   24.915506]  queue_work_on+0xb6/0xc0
[   24.915717]  workqueue_uaf+0x26d/0x560
[   24.916063]  kunit_try_run_case+0x1a5/0x480
[   24.916496]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   24.917131]  kthread+0x337/0x6f0
[   24.917591]  ret_from_fork+0x116/0x1d0
[   24.917993]  ret_from_fork_asm+0x1a/0x30
[   24.918196] 
[   24.918287] The buggy address belongs to the object at ffff888103ea5c00
[   24.918287]  which belongs to the cache kmalloc-32 of size 32
[   24.919505] The buggy address is located 0 bytes inside of
[   24.919505]  freed 32-byte region [ffff888103ea5c00, ffff888103ea5c20)
[   24.920091] 
[   24.920253] The buggy address belongs to the physical page:
[   24.920737] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103ea5
[   24.921524] flags: 0x200000000000000(node=0|zone=2)
[   24.922012] page_type: f5(slab)
[   24.922379] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   24.922843] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   24.923169] page dumped because: kasan: bad access detected
[   24.923331] 
[   24.923391] Memory state around the buggy address:
[   24.923537]  ffff888103ea5b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   24.923792]  ffff888103ea5b80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   24.924018] >ffff888103ea5c00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
[   24.924424]                    ^
[   24.924611]  ffff888103ea5c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.924821]  ffff888103ea5d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   24.925318] ==================================================================