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

Environment
e850-96
qemu-arm64
qemu-x86_64 

[   55.995299] ==================================================================
[   56.018987] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8
[   56.024885] Read of size 1 at addr ffff000808564890 by task kunit_try_catch/343
[   56.032176] 
[   56.033664] CPU: 2 UID: 0 PID: 343 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250714 #1 PREEMPT 
[   56.033725] Tainted: [B]=BAD_PAGE, [N]=TEST
[   56.033744] Hardware name: WinLink E850-96 board (DT)
[   56.033766] Call trace:
[   56.033783]  show_stack+0x20/0x38 (C)
[   56.033823]  dump_stack_lvl+0x8c/0xd0
[   56.033854]  print_report+0x118/0x5d0
[   56.033886]  kasan_report+0xdc/0x128
[   56.033913]  __asan_report_load1_noabort+0x20/0x30
[   56.033951]  strcmp+0xc0/0xc8
[   56.033984]  kasan_strings+0x340/0xb00
[   56.034019]  kunit_try_run_case+0x170/0x3f0
[   56.034058]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   56.034093]  kthread+0x328/0x630
[   56.034124]  ret_from_fork+0x10/0x20
[   56.034162] 
[   56.100232] Allocated by task 343:
[   56.103620]  kasan_save_stack+0x3c/0x68
[   56.107435]  kasan_save_track+0x20/0x40
[   56.111255]  kasan_save_alloc_info+0x40/0x58
[   56.115508]  __kasan_kmalloc+0xd4/0xd8
[   56.119241]  __kmalloc_cache_noprof+0x16c/0x3c0
[   56.123754]  kasan_strings+0xc8/0xb00
[   56.127402]  kunit_try_run_case+0x170/0x3f0
[   56.131567]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   56.137036]  kthread+0x328/0x630
[   56.140247]  ret_from_fork+0x10/0x20
[   56.143806] 
[   56.145283] Freed by task 343:
[   56.148323]  kasan_save_stack+0x3c/0x68
[   56.152139]  kasan_save_track+0x20/0x40
[   56.155959]  kasan_save_free_info+0x4c/0x78
[   56.160126]  __kasan_slab_free+0x6c/0x98
[   56.164033]  kfree+0x214/0x3c8
[   56.167070]  kasan_strings+0x24c/0xb00
[   56.170803]  kunit_try_run_case+0x170/0x3f0
[   56.174969]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   56.180438]  kthread+0x328/0x630
[   56.183650]  ret_from_fork+0x10/0x20
[   56.187208] 
[   56.188686] The buggy address belongs to the object at ffff000808564880
[   56.188686]  which belongs to the cache kmalloc-32 of size 32
[   56.201012] The buggy address is located 16 bytes inside of
[   56.201012]  freed 32-byte region [ffff000808564880, ffff0008085648a0)
[   56.213076] 
[   56.214556] The buggy address belongs to the physical page:
[   56.220112] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x888564
[   56.228097] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   56.234606] page_type: f5(slab)
[   56.237742] raw: 0bfffe0000000000 ffff000800002780 dead000000000122 0000000000000000
[   56.245461] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   56.253181] page dumped because: kasan: bad access detected
[   56.258735] 
[   56.260212] Memory state around the buggy address:
[   56.264993]  ffff000808564780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.272194]  ffff000808564800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.279399] >ffff000808564880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.286599]                          ^
[   56.290335]  ffff000808564900: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   56.297540]  ffff000808564980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   56.304742] ==================================================================
Metadata Full log Test run details 

[   31.974645] ==================================================================
[   31.974706] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8
[   31.975008] Read of size 1 at addr fff00000c65343d0 by task kunit_try_catch/290
[   31.975549] 
[   31.975773] CPU: 0 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250714 #1 PREEMPT 
[   31.975872] Tainted: [B]=BAD_PAGE, [N]=TEST
[   31.975996] Hardware name: linux,dummy-virt (DT)
[   31.976060] Call trace:
[   31.976124]  show_stack+0x20/0x38 (C)
[   31.976278]  dump_stack_lvl+0x8c/0xd0
[   31.976331]  print_report+0x118/0x5d0
[   31.976691]  kasan_report+0xdc/0x128
[   31.976771]  __asan_report_load1_noabort+0x20/0x30
[   31.976885]  strcmp+0xc0/0xc8
[   31.976997]  kasan_strings+0x340/0xb00
[   31.977190]  kunit_try_run_case+0x170/0x3f0
[   31.977252]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   31.977304]  kthread+0x328/0x630
[   31.977347]  ret_from_fork+0x10/0x20
[   31.977398] 
[   31.977457] Allocated by task 290:
[   31.977513]  kasan_save_stack+0x3c/0x68
[   31.977567]  kasan_save_track+0x20/0x40
[   31.977614]  kasan_save_alloc_info+0x40/0x58
[   31.977656]  __kasan_kmalloc+0xd4/0xd8
[   31.977697]  __kmalloc_cache_noprof+0x16c/0x3c0
[   31.977740]  kasan_strings+0xc8/0xb00
[   31.977778]  kunit_try_run_case+0x170/0x3f0
[   31.977818]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   31.977865]  kthread+0x328/0x630
[   31.977899]  ret_from_fork+0x10/0x20
[   31.977936] 
[   31.977967] Freed by task 290:
[   31.977995]  kasan_save_stack+0x3c/0x68
[   31.978044]  kasan_save_track+0x20/0x40
[   31.978099]  kasan_save_free_info+0x4c/0x78
[   31.978148]  __kasan_slab_free+0x6c/0x98
[   31.978190]  kfree+0x214/0x3c8
[   31.978228]  kasan_strings+0x24c/0xb00
[   31.978265]  kunit_try_run_case+0x170/0x3f0
[   31.978316]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   31.978364]  kthread+0x328/0x630
[   31.978400]  ret_from_fork+0x10/0x20
[   31.978438] 
[   31.978470] The buggy address belongs to the object at fff00000c65343c0
[   31.978470]  which belongs to the cache kmalloc-32 of size 32
[   31.978536] The buggy address is located 16 bytes inside of
[   31.978536]  freed 32-byte region [fff00000c65343c0, fff00000c65343e0)
[   31.978605] 
[   31.978635] The buggy address belongs to the physical page:
[   31.978675] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106534
[   31.978758] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   31.978832] page_type: f5(slab)
[   31.978878] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   31.978930] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   31.978981] page dumped because: kasan: bad access detected
[   31.979025] 
[   31.979737] Memory state around the buggy address:
[   31.979829]  fff00000c6534280: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   31.979888]  fff00000c6534300: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc
[   31.979998] >fff00000c6534380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.980040]                                                  ^
[   31.980094]  fff00000c6534400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   31.980467]  fff00000c6534480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   31.980685] ==================================================================
Metadata Full log Test run details 

[   26.271380] ==================================================================
[   26.273322] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0
[   26.274275] Read of size 1 at addr ffff888103eba090 by task kunit_try_catch/308
[   26.274641] 
[   26.274898] CPU: 0 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G    B   W        N  6.16.0-rc6-next-20250714 #1 PREEMPT(voluntary) 
[   26.274987] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST
[   26.275006] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   26.275037] Call Trace:
[   26.275053]  <TASK>
[   26.275073]  dump_stack_lvl+0x73/0xb0
[   26.275110]  print_report+0xd1/0x610
[   26.275135]  ? __virt_addr_valid+0x1db/0x2d0
[   26.275160]  ? strcmp+0xb0/0xc0
[   26.275178]  ? kasan_complete_mode_report_info+0x64/0x200
[   26.275203]  ? strcmp+0xb0/0xc0
[   26.275222]  kasan_report+0x141/0x180
[   26.275242]  ? strcmp+0xb0/0xc0
[   26.275264]  __asan_report_load1_noabort+0x18/0x20
[   26.275287]  strcmp+0xb0/0xc0
[   26.275306]  kasan_strings+0x431/0xe80
[   26.275325]  ? trace_hardirqs_on+0x37/0xe0
[   26.275348]  ? __pfx_kasan_strings+0x10/0x10
[   26.275367]  ? finish_task_switch.isra.0+0x153/0x700
[   26.275389]  ? __switch_to+0x47/0xf80
[   26.275414]  ? __schedule+0x10cc/0x2b60
[   26.275437]  ? __pfx_read_tsc+0x10/0x10
[   26.275458]  ? ktime_get_ts64+0x86/0x230
[   26.275482]  kunit_try_run_case+0x1a5/0x480
[   26.275506]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.275526]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   26.275548]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   26.275572]  ? __kthread_parkme+0x82/0x180
[   26.275593]  ? preempt_count_sub+0x50/0x80
[   26.275616]  ? __pfx_kunit_try_run_case+0x10/0x10
[   26.275638]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.275672]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   26.275696]  kthread+0x337/0x6f0
[   26.275716]  ? trace_preempt_on+0x20/0xc0
[   26.275743]  ? __pfx_kthread+0x10/0x10
[   26.275764]  ? _raw_spin_unlock_irq+0x47/0x80
[   26.275785]  ? calculate_sigpending+0x7b/0xa0
[   26.275809]  ? __pfx_kthread+0x10/0x10
[   26.275830]  ret_from_fork+0x116/0x1d0
[   26.275848]  ? __pfx_kthread+0x10/0x10
[   26.275869]  ret_from_fork_asm+0x1a/0x30
[   26.275899]  </TASK>
[   26.275911] 
[   26.290621] Allocated by task 308:
[   26.290956]  kasan_save_stack+0x45/0x70
[   26.291172]  kasan_save_track+0x18/0x40
[   26.291348]  kasan_save_alloc_info+0x3b/0x50
[   26.291547]  __kasan_kmalloc+0xb7/0xc0
[   26.292355]  __kmalloc_cache_noprof+0x189/0x420
[   26.292618]  kasan_strings+0xc0/0xe80
[   26.292812]  kunit_try_run_case+0x1a5/0x480
[   26.293221]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.293475]  kthread+0x337/0x6f0
[   26.293644]  ret_from_fork+0x116/0x1d0
[   26.294263]  ret_from_fork_asm+0x1a/0x30
[   26.294449] 
[   26.294539] Freed by task 308:
[   26.295248]  kasan_save_stack+0x45/0x70
[   26.295564]  kasan_save_track+0x18/0x40
[   26.295715]  kasan_save_free_info+0x3f/0x60
[   26.296122]  __kasan_slab_free+0x56/0x70
[   26.296304]  kfree+0x222/0x3f0
[   26.296629]  kasan_strings+0x2aa/0xe80
[   26.296845]  kunit_try_run_case+0x1a5/0x480
[   26.297258]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   26.297605]  kthread+0x337/0x6f0
[   26.297761]  ret_from_fork+0x116/0x1d0
[   26.298167]  ret_from_fork_asm+0x1a/0x30
[   26.298523] 
[   26.298621] The buggy address belongs to the object at ffff888103eba080
[   26.298621]  which belongs to the cache kmalloc-32 of size 32
[   26.299457] The buggy address is located 16 bytes inside of
[   26.299457]  freed 32-byte region [ffff888103eba080, ffff888103eba0a0)
[   26.300133] 
[   26.300229] The buggy address belongs to the physical page:
[   26.300440] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103eba
[   26.300831] flags: 0x200000000000000(node=0|zone=2)
[   26.301702] page_type: f5(slab)
[   26.301927] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   26.302405] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   26.302741] page dumped because: kasan: bad access detected
[   26.303392] 
[   26.303482] Memory state around the buggy address:
[   26.303820]  ffff888103eb9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.304131]  ffff888103eba000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   26.304473] >ffff888103eba080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   26.305286]                          ^
[   26.305452]  ffff888103eba100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   26.305948]  ffff888103eba180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   26.306413] ==================================================================
Metadata Full log Test run details