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Date
June 26, 2025, 11:12 a.m.

Environment
e850-96
qemu-arm64
qemu-x86_64 

[   40.484979] ==================================================================
[   40.492043] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00
[   40.498721] Read of size 1 at addr ffff0008066bd2d0 by task kunit_try_catch/308
[   40.506012] 
[   40.507498] CPU: 7 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc3 #1 PREEMPT 
[   40.507556] Tainted: [B]=BAD_PAGE, [N]=TEST
[   40.507575] Hardware name: WinLink E850-96 board (DT)
[   40.507596] Call trace:
[   40.507611]  show_stack+0x20/0x38 (C)
[   40.507649]  dump_stack_lvl+0x8c/0xd0
[   40.507690]  print_report+0x118/0x608
[   40.507725]  kasan_report+0xdc/0x128
[   40.507753]  __asan_report_load1_noabort+0x20/0x30
[   40.507791]  kasan_strings+0x95c/0xb00
[   40.507827]  kunit_try_run_case+0x170/0x3f0
[   40.507864]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   40.507904]  kthread+0x328/0x630
[   40.507940]  ret_from_fork+0x10/0x20
[   40.507977] 
[   40.569900] Allocated by task 308:
[   40.573286]  kasan_save_stack+0x3c/0x68
[   40.577105]  kasan_save_track+0x20/0x40
[   40.580924]  kasan_save_alloc_info+0x40/0x58
[   40.585178]  __kasan_kmalloc+0xd4/0xd8
[   40.588910]  __kmalloc_cache_noprof+0x16c/0x3c0
[   40.593424]  kasan_strings+0xc8/0xb00
[   40.597070]  kunit_try_run_case+0x170/0x3f0
[   40.601237]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   40.606705]  kthread+0x328/0x630
[   40.609917]  ret_from_fork+0x10/0x20
[   40.613476] 
[   40.614952] Freed by task 308:
[   40.617992]  kasan_save_stack+0x3c/0x68
[   40.621809]  kasan_save_track+0x20/0x40
[   40.625629]  kasan_save_free_info+0x4c/0x78
[   40.629795]  __kasan_slab_free+0x6c/0x98
[   40.633702]  kfree+0x214/0x3c8
[   40.636740]  kasan_strings+0x24c/0xb00
[   40.640472]  kunit_try_run_case+0x170/0x3f0
[   40.644639]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   40.650107]  kthread+0x328/0x630
[   40.653319]  ret_from_fork+0x10/0x20
[   40.656878] 
[   40.658355] The buggy address belongs to the object at ffff0008066bd2c0
[   40.658355]  which belongs to the cache kmalloc-32 of size 32
[   40.670680] The buggy address is located 16 bytes inside of
[   40.670680]  freed 32-byte region [ffff0008066bd2c0, ffff0008066bd2e0)
[   40.682746] 
[   40.684223] The buggy address belongs to the physical page:
[   40.689780] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8866bd
[   40.697766] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   40.704275] page_type: f5(slab)
[   40.707410] raw: 0bfffe0000000000 ffff000800002780 dead000000000122 0000000000000000
[   40.715131] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   40.722850] page dumped because: kasan: bad access detected
[   40.728405] 
[   40.729880] Memory state around the buggy address:
[   40.734662]  ffff0008066bd180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   40.741863]  ffff0008066bd200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   40.749068] >ffff0008066bd280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   40.756269]                                                  ^
[   40.762089]  ffff0008066bd300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   40.769294]  ffff0008066bd380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   40.776494] ==================================================================
Metadata Full log Test run details 

[   20.313145] ==================================================================
[   20.313225] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00
[   20.313537] Read of size 1 at addr fff00000c5be7090 by task kunit_try_catch/261
[   20.313619] 
[   20.313754] CPU: 1 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc3 #1 PREEMPT 
[   20.313889] Tainted: [B]=BAD_PAGE, [N]=TEST
[   20.313921] Hardware name: linux,dummy-virt (DT)
[   20.313968] Call trace:
[   20.313995]  show_stack+0x20/0x38 (C)
[   20.314060]  dump_stack_lvl+0x8c/0xd0
[   20.314115]  print_report+0x118/0x608
[   20.314170]  kasan_report+0xdc/0x128
[   20.314218]  __asan_report_load1_noabort+0x20/0x30
[   20.314270]  kasan_strings+0x95c/0xb00
[   20.314319]  kunit_try_run_case+0x170/0x3f0
[   20.314381]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   20.314436]  kthread+0x328/0x630
[   20.314484]  ret_from_fork+0x10/0x20
[   20.314534] 
[   20.314564] Allocated by task 261:
[   20.314602]  kasan_save_stack+0x3c/0x68
[   20.314643]  kasan_save_track+0x20/0x40
[   20.314697]  kasan_save_alloc_info+0x40/0x58
[   20.314744]  __kasan_kmalloc+0xd4/0xd8
[   20.314783]  __kmalloc_cache_noprof+0x16c/0x3c0
[   20.314822]  kasan_strings+0xc8/0xb00
[   20.314871]  kunit_try_run_case+0x170/0x3f0
[   20.314912]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   20.314959]  kthread+0x328/0x630
[   20.314996]  ret_from_fork+0x10/0x20
[   20.315035] 
[   20.315056] Freed by task 261:
[   20.315082]  kasan_save_stack+0x3c/0x68
[   20.315120]  kasan_save_track+0x20/0x40
[   20.315167]  kasan_save_free_info+0x4c/0x78
[   20.315215]  __kasan_slab_free+0x6c/0x98
[   20.315254]  kfree+0x214/0x3c8
[   20.315293]  kasan_strings+0x24c/0xb00
[   20.315333]  kunit_try_run_case+0x170/0x3f0
[   20.315373]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   20.315430]  kthread+0x328/0x630
[   20.315468]  ret_from_fork+0x10/0x20
[   20.315506] 
[   20.315527] The buggy address belongs to the object at fff00000c5be7080
[   20.315527]  which belongs to the cache kmalloc-32 of size 32
[   20.315589] The buggy address is located 16 bytes inside of
[   20.315589]  freed 32-byte region [fff00000c5be7080, fff00000c5be70a0)
[   20.315652] 
[   20.315675] The buggy address belongs to the physical page:
[   20.315708] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105be7
[   20.315759] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   20.315810] page_type: f5(slab)
[   20.315849] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000
[   20.316260] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000
[   20.316308] page dumped because: kasan: bad access detected
[   20.316713] 
[   20.316792] Memory state around the buggy address:
[   20.317242]  fff00000c5be6f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   20.317592]  fff00000c5be7000: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   20.317885] >fff00000c5be7080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   20.318062]                          ^
[   20.318169]  fff00000c5be7100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
[   20.318220]  fff00000c5be7180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   20.318451] ==================================================================
Metadata Full log Test run details 

[   12.853156] ==================================================================
[   12.853788] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80
[   12.854150] Read of size 1 at addr ffff888102a07fd0 by task kunit_try_catch/278
[   12.854456] 
[   12.854550] CPU: 0 UID: 0 PID: 278 Comm: kunit_try_catch Tainted: G    B            N  6.15.4-rc3 #1 PREEMPT(voluntary) 
[   12.854597] Tainted: [B]=BAD_PAGE, [N]=TEST
[   12.854609] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   12.854630] Call Trace:
[   12.854648]  <TASK>
[   12.854667]  dump_stack_lvl+0x73/0xb0
[   12.854691]  print_report+0xd1/0x650
[   12.854736]  ? __virt_addr_valid+0x1db/0x2d0
[   12.854758]  ? kasan_strings+0xcbc/0xe80
[   12.854779]  ? kasan_complete_mode_report_info+0x64/0x200
[   12.854803]  ? kasan_strings+0xcbc/0xe80
[   12.854825]  kasan_report+0x141/0x180
[   12.854848]  ? kasan_strings+0xcbc/0xe80
[   12.854874]  __asan_report_load1_noabort+0x18/0x20
[   12.854894]  kasan_strings+0xcbc/0xe80
[   12.854914]  ? trace_hardirqs_on+0x37/0xe0
[   12.854948]  ? __pfx_kasan_strings+0x10/0x10
[   12.854968]  ? finish_task_switch.isra.0+0x153/0x700
[   12.854992]  ? __switch_to+0x5d9/0xf60
[   12.855012]  ? dequeue_task_fair+0x156/0x4e0
[   12.855036]  ? __schedule+0x10cc/0x2b60
[   12.855059]  ? __pfx_read_tsc+0x10/0x10
[   12.855078]  ? ktime_get_ts64+0x86/0x230
[   12.855103]  kunit_try_run_case+0x1a5/0x480
[   12.855128]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.855150]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   12.855174]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   12.855197]  ? __kthread_parkme+0x82/0x180
[   12.855218]  ? preempt_count_sub+0x50/0x80
[   12.855244]  ? __pfx_kunit_try_run_case+0x10/0x10
[   12.855267]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.855290]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   12.855313]  kthread+0x337/0x6f0
[   12.855329]  ? trace_preempt_on+0x20/0xc0
[   12.855351]  ? __pfx_kthread+0x10/0x10
[   12.855368]  ? _raw_spin_unlock_irq+0x47/0x80
[   12.855389]  ? calculate_sigpending+0x7b/0xa0
[   12.855411]  ? __pfx_kthread+0x10/0x10
[   12.855429]  ret_from_fork+0x41/0x80
[   12.855449]  ? __pfx_kthread+0x10/0x10
[   12.855466]  ret_from_fork_asm+0x1a/0x30
[   12.855497]  </TASK>
[   12.855507] 
[   12.863564] Allocated by task 278:
[   12.863704]  kasan_save_stack+0x45/0x70
[   12.863853]  kasan_save_track+0x18/0x40
[   12.864258]  kasan_save_alloc_info+0x3b/0x50
[   12.864478]  __kasan_kmalloc+0xb7/0xc0
[   12.864854]  __kmalloc_cache_noprof+0x189/0x420
[   12.865097]  kasan_strings+0xc0/0xe80
[   12.865286]  kunit_try_run_case+0x1a5/0x480
[   12.865497]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.865746]  kthread+0x337/0x6f0
[   12.865914]  ret_from_fork+0x41/0x80
[   12.866107]  ret_from_fork_asm+0x1a/0x30
[   12.866306] 
[   12.866399] Freed by task 278:
[   12.866568]  kasan_save_stack+0x45/0x70
[   12.866701]  kasan_save_track+0x18/0x40
[   12.866899]  kasan_save_free_info+0x3f/0x60
[   12.867124]  __kasan_slab_free+0x56/0x70
[   12.867324]  kfree+0x222/0x3f0
[   12.867481]  kasan_strings+0x2aa/0xe80
[   12.867708]  kunit_try_run_case+0x1a5/0x480
[   12.867889]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   12.868118]  kthread+0x337/0x6f0
[   12.868277]  ret_from_fork+0x41/0x80
[   12.868438]  ret_from_fork_asm+0x1a/0x30
[   12.868820] 
[   12.868943] The buggy address belongs to the object at ffff888102a07fc0
[   12.868943]  which belongs to the cache kmalloc-32 of size 32
[   12.869376] The buggy address is located 16 bytes inside of
[   12.869376]  freed 32-byte region [ffff888102a07fc0, ffff888102a07fe0)
[   12.870002] 
[   12.870248] The buggy address belongs to the physical page:
[   12.870452] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a07
[   12.871051] flags: 0x200000000000000(node=0|zone=2)
[   12.871229] page_type: f5(slab)
[   12.871355] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000
[   12.871593] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000
[   12.871947] page dumped because: kasan: bad access detected
[   12.872205] 
[   12.872402] Memory state around the buggy address:
[   12.872952]  ffff888102a07e80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
[   12.873267]  ffff888102a07f00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc
[   12.873510] >ffff888102a07f80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc
[   12.873724]                                                  ^
[   12.873904]  ffff888102a08000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   12.874226]  ffff888102a08080: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc
[   12.874669] ==================================================================
Metadata Full log Test run details