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Date
July 14, 2025, 10:38 a.m.

Environment
e850-96
qemu-arm64
qemu-x86_64 

[   56.312095] ==================================================================
[   56.319154] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00
[   56.325837] Read of size 1 at addr ffff000808564890 by task kunit_try_catch/343
[   56.333128] 
[   56.334612] CPU: 2 UID: 0 PID: 343 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250714 #1 PREEMPT 
[   56.334667] Tainted: [B]=BAD_PAGE, [N]=TEST
[   56.334686] Hardware name: WinLink E850-96 board (DT)
[   56.334707] Call trace:
[   56.334720]  show_stack+0x20/0x38 (C)
[   56.334755]  dump_stack_lvl+0x8c/0xd0
[   56.334789]  print_report+0x118/0x5d0
[   56.334817]  kasan_report+0xdc/0x128
[   56.334844]  __asan_report_load1_noabort+0x20/0x30
[   56.334879]  kasan_strings+0x95c/0xb00
[   56.334913]  kunit_try_run_case+0x170/0x3f0
[   56.334951]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   56.334983]  kthread+0x328/0x630
[   56.335013]  ret_from_fork+0x10/0x20
[   56.335050] 
[   56.398229] Allocated by task 343:
[   56.401616]  kasan_save_stack+0x3c/0x68
[   56.405435]  kasan_save_track+0x20/0x40
[   56.409254]  kasan_save_alloc_info+0x40/0x58
[   56.413507]  __kasan_kmalloc+0xd4/0xd8
[   56.417240]  __kmalloc_cache_noprof+0x16c/0x3c0
[   56.421754]  kasan_strings+0xc8/0xb00
[   56.425399]  kunit_try_run_case+0x170/0x3f0
[   56.429566]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   56.435035]  kthread+0x328/0x630
[   56.438246]  ret_from_fork+0x10/0x20
[   56.441806] 
[   56.443281] Freed by task 343:
[   56.446321]  kasan_save_stack+0x3c/0x68
[   56.450139]  kasan_save_track+0x20/0x40
[   56.453958]  kasan_save_free_info+0x4c/0x78
[   56.458125]  __kasan_slab_free+0x6c/0x98
[   56.462031]  kfree+0x214/0x3c8
[   56.465069]  kasan_strings+0x24c/0xb00
[   56.468802]  kunit_try_run_case+0x170/0x3f0
[   56.472968]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   56.478437]  kthread+0x328/0x630
[   56.481648]  ret_from_fork+0x10/0x20
[   56.485207] 
[   56.486684] The buggy address belongs to the object at ffff000808564880
[   56.486684]  which belongs to the cache kmalloc-32 of size 32
[   56.499011] The buggy address is located 16 bytes inside of
[   56.499011]  freed 32-byte region [ffff000808564880, ffff0008085648a0)
[   56.511075] 
[   56.512553] The buggy address belongs to the physical page:
[   56.518109] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x888564
[   56.526094] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   56.532603] page_type: f5(slab)
[   56.535737] raw: 0bfffe0000000000 ffff000800002780 dead000000000122 0000000000000000
[   56.543460] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   56.551179] page dumped because: kasan: bad access detected
[   56.556734] 
[   56.558210] Memory state around the buggy address:
[   56.562989]  ffff000808564780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.570193]  ffff000808564800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.577399] >ffff000808564880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.584598]                          ^
[   56.588335]  ffff000808564900: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   56.595539]  ffff000808564980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.602741] ==================================================================
Metadata Full log Test run details 

[   31.981467] ==================================================================
[   31.981520] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00
[   31.981574] Read of size 1 at addr fff00000c65343d0 by task kunit_try_catch/290
[   31.981914] 
[   31.982138] CPU: 0 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250714 #1 PREEMPT 
[   31.982262] Tainted: [B]=BAD_PAGE, [N]=TEST
[   31.982550] Hardware name: linux,dummy-virt (DT)
[   31.982636] Call trace:
[   31.982703]  show_stack+0x20/0x38 (C)
[   31.982757]  dump_stack_lvl+0x8c/0xd0
[   31.983115]  print_report+0x118/0x5d0
[   31.983191]  kasan_report+0xdc/0x128
[   31.983283]  __asan_report_load1_noabort+0x20/0x30
[   31.983337]  kasan_strings+0x95c/0xb00
[   31.983423]  kunit_try_run_case+0x170/0x3f0
[   31.983587]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   31.983644]  kthread+0x328/0x630
[   31.983953]  ret_from_fork+0x10/0x20
[   31.984032] 
[   31.984068] Allocated by task 290:
[   31.984196]  kasan_save_stack+0x3c/0x68
[   31.984277]  kasan_save_track+0x20/0x40
[   31.984424]  kasan_save_alloc_info+0x40/0x58
[   31.984491]  __kasan_kmalloc+0xd4/0xd8
[   31.984561]  __kmalloc_cache_noprof+0x16c/0x3c0
[   31.984605]  kasan_strings+0xc8/0xb00
[   31.984778]  kunit_try_run_case+0x170/0x3f0
[   31.985111]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   31.985230]  kthread+0x328/0x630
[   31.985348]  ret_from_fork+0x10/0x20
[   31.985447] 
[   31.985503] Freed by task 290:
[   31.985595]  kasan_save_stack+0x3c/0x68
[   31.985692]  kasan_save_track+0x20/0x40
[   31.985733]  kasan_save_free_info+0x4c/0x78
[   31.985955]  __kasan_slab_free+0x6c/0x98
[   31.986031]  kfree+0x214/0x3c8
[   31.986221]  kasan_strings+0x24c/0xb00
[   31.986316]  kunit_try_run_case+0x170/0x3f0
[   31.986396]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   31.987173]  kthread+0x328/0x630
[   31.987271]  ret_from_fork+0x10/0x20
[   31.987781] 
[   31.988063] The buggy address belongs to the object at fff00000c65343c0
[   31.988063]  which belongs to the cache kmalloc-32 of size 32
[   31.988332] The buggy address is located 16 bytes inside of
[   31.988332]  freed 32-byte region [fff00000c65343c0, fff00000c65343e0)
[   31.988396] 
[   31.988573] The buggy address belongs to the physical page:
[   31.988625] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106534
[   31.988787] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   31.989100] page_type: f5(slab)
[   31.989405] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   31.989645] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   31.989872] page dumped because: kasan: bad access detected
[   31.990212] 
[   31.990303] Memory state around the buggy address:
[   31.990383]  fff00000c6534280: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   31.990508]  fff00000c6534300: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   31.990584] >fff00000c6534380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.990710]                                                  ^
[   31.990768]  fff00000c6534400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.990834]  fff00000c6534480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.990947] ==================================================================
Metadata Full log Test run details 

[   26.307204] ==================================================================
[   26.307566] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80
[   26.308357] Read of size 1 at addr ffff888103eba090 by task kunit_try_catch/308
[   26.308786] 
[   26.309187] CPU: 0 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G    B   W        N  6.16.0-rc6-next-20250714 #1 PREEMPT(voluntary) 
[   26.309253] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST
[   26.309269] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   26.309293] Call Trace:
[   26.309313]  <TASK>
[   26.309334]  dump_stack_lvl+0x73/0xb0
[   26.309369]  print_report+0xd1/0x610
[   26.309393]  ? __virt_addr_valid+0x1db/0x2d0
[   26.309417]  ? kasan_strings+0xcbc/0xe80
[   26.309438]  ? kasan_complete_mode_report_info+0x64/0x200
[   26.309463]  ? kasan_strings+0xcbc/0xe80
[   26.309484]  kasan_report+0x141/0x180
[   26.309505]  ? kasan_strings+0xcbc/0xe80
[   26.309530]  __asan_report_load1_noabort+0x18/0x20
[   26.309553]  kasan_strings+0xcbc/0xe80
[   26.309571]  ? trace_hardirqs_on+0x37/0xe0
[   26.309594]  ? __pfx_kasan_strings+0x10/0x10
[   26.309613]  ? finish_task_switch.isra.0+0x153/0x700
[   26.309636]  ? __switch_to+0x47/0xf80
[   26.309674]  ? __schedule+0x10cc/0x2b60
[   26.309697]  ? __pfx_read_tsc+0x10/0x10
[   26.309718]  ? ktime_get_ts64+0x86/0x230
[   26.309743]  kunit_try_run_case+0x1a5/0x480
[   26.309765]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.309785]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   26.309808]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   26.309831]  ? __kthread_parkme+0x82/0x180
[   26.309851]  ? preempt_count_sub+0x50/0x80
[   26.309873]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.309894]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.309918]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   26.309998]  kthread+0x337/0x6f0
[   26.310020]  ? trace_preempt_on+0x20/0xc0
[   26.310047]  ? __pfx_kthread+0x10/0x10
[   26.310067]  ? _raw_spin_unlock_irq+0x47/0x80
[   26.310088]  ? calculate_sigpending+0x7b/0xa0
[   26.310112]  ? __pfx_kthread+0x10/0x10
[   26.310133]  ret_from_fork+0x116/0x1d0
[   26.310154]  ? __pfx_kthread+0x10/0x10
[   26.310175]  ret_from_fork_asm+0x1a/0x30
[   26.310207]  </TASK>
[   26.310218] 
[   26.322781] Allocated by task 308:
[   26.322950]  kasan_save_stack+0x45/0x70
[   26.323112]  kasan_save_track+0x18/0x40
[   26.323245]  kasan_save_alloc_info+0x3b/0x50
[   26.323391]  __kasan_kmalloc+0xb7/0xc0
[   26.323518]  __kmalloc_cache_noprof+0x189/0x420
[   26.323683]  kasan_strings+0xc0/0xe80
[   26.323809]  kunit_try_run_case+0x1a5/0x480
[   26.323949]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.324117]  kthread+0x337/0x6f0
[   26.326050]  ret_from_fork+0x116/0x1d0
[   26.326421]  ret_from_fork_asm+0x1a/0x30
[   26.327004] 
[   26.327168] Freed by task 308:
[   26.327439]  kasan_save_stack+0x45/0x70
[   26.327812]  kasan_save_track+0x18/0x40
[   26.328201]  kasan_save_free_info+0x3f/0x60
[   26.329405]  __kasan_slab_free+0x56/0x70
[   26.330559]  kfree+0x222/0x3f0
[   26.330886]  kasan_strings+0x2aa/0xe80
[   26.331638]  kunit_try_run_case+0x1a5/0x480
[   26.332019]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.332467]  kthread+0x337/0x6f0
[   26.332850]  ret_from_fork+0x116/0x1d0
[   26.333228]  ret_from_fork_asm+0x1a/0x30
[   26.333574] 
[   26.333746] The buggy address belongs to the object at ffff888103eba080
[   26.333746]  which belongs to the cache kmalloc-32 of size 32
[   26.334310] The buggy address is located 16 bytes inside of
[   26.334310]  freed 32-byte region [ffff888103eba080, ffff888103eba0a0)
[   26.334644] 
[   26.334839] The buggy address belongs to the physical page:
[   26.335090] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103eba
[   26.335319] flags: 0x200000000000000(node=0|zone=2)
[   26.335971] page_type: f5(slab)
[   26.336206] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   26.336517] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   26.336893] page dumped because: kasan: bad access detected
[   26.337126] 
[   26.337205] Memory state around the buggy address:
[   26.337426]  ffff888103eb9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.337757]  ffff888103eba000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   26.338093] >ffff888103eba080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   26.338416]                          ^
[   26.338600]  ffff888103eba100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   26.338936]  ffff888103eba180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   26.339183] ==================================================================
Metadata Full log Test run details