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Date
June 26, 2025, 9:10 a.m.

Environment
dragonboard-845c
qemu-arm64
qemu-x86_64 

[   40.692743] ==================================================================
[   40.703431] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310
[   40.710662] Write of size 33 at addr ffff000093903980 by task kunit_try_catch/272
[   40.718247] 
[   40.719778] CPU: 0 UID: 0 PID: 272 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250626 #1 PREEMPT 
[   40.719806] Tainted: [B]=BAD_PAGE, [N]=TEST
[   40.719815] Hardware name: Thundercomm Dragonboard 845c (DT)
[   40.719827] Call trace:
[   40.719834]  show_stack+0x20/0x38 (C)
[   40.719852]  dump_stack_lvl+0x8c/0xd0
[   40.719871]  print_report+0x118/0x608
[   40.719890]  kasan_report+0xdc/0x128
[   40.719908]  kasan_check_range+0x100/0x1a8
[   40.719928]  __asan_memset+0x34/0x78
[   40.719942]  kmalloc_uaf_memset+0x170/0x310
[   40.719959]  kunit_try_run_case+0x170/0x3f0
[   40.719977]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   40.720000]  kthread+0x328/0x630
[   40.720014]  ret_from_fork+0x10/0x20
[   40.720031] 
[   40.788647] Allocated by task 272:
[   40.792107]  kasan_save_stack+0x3c/0x68
[   40.796017]  kasan_save_track+0x20/0x40
[   40.799927]  kasan_save_alloc_info+0x40/0x58
[   40.804272]  __kasan_kmalloc+0xd4/0xd8
[   40.808096]  __kmalloc_cache_noprof+0x16c/0x3c0
[   40.812704]  kmalloc_uaf_memset+0xb8/0x310
[   40.816871]  kunit_try_run_case+0x170/0x3f0
[   40.821126]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   40.826699]  kthread+0x328/0x630
[   40.829990]  ret_from_fork+0x10/0x20
[   40.833628] 
[   40.835156] Freed by task 272:
[   40.838269]  kasan_save_stack+0x3c/0x68
[   40.842178]  kasan_save_track+0x20/0x40
[   40.846087]  kasan_save_free_info+0x4c/0x78
[   40.850339]  __kasan_slab_free+0x6c/0x98
[   40.854335]  kfree+0x214/0x3c8
[   40.857453]  kmalloc_uaf_memset+0x11c/0x310
[   40.861706]  kunit_try_run_case+0x170/0x3f0
[   40.865958]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   40.871531]  kthread+0x328/0x630
[   40.874821]  ret_from_fork+0x10/0x20
[   40.878461] 
[   40.879988] The buggy address belongs to the object at ffff000093903980
[   40.879988]  which belongs to the cache kmalloc-64 of size 64
[   40.892475] The buggy address is located 0 bytes inside of
[   40.892475]  freed 64-byte region [ffff000093903980, ffff0000939039c0)
[   40.904611] 
[   40.906142] The buggy address belongs to the physical page:
[   40.911789] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113903
[   40.919902] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   40.926516] page_type: f5(slab)
[   40.929720] raw: 0bfffe0000000000 ffff0000800028c0 dead000000000122 0000000000000000
[   40.937567] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   40.945407] page dumped because: kasan: bad access detected
[   40.951056] 
[   40.952590] Memory state around the buggy address:
[   40.957452]  ffff000093903880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   40.964777]  ffff000093903900: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   40.972091] >ffff000093903980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   40.979406]                    ^
[   40.982695]  ffff000093903a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   40.990017]  ffff000093903a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   40.997339] ==================================================================
Metadata Full log Test run details 

[   26.941568] ==================================================================
[   26.941768] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310
[   26.941884] Write of size 33 at addr fff00000c5753700 by task kunit_try_catch/198
[   26.942089] 
[   26.942236] CPU: 0 UID: 0 PID: 198 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250626 #1 PREEMPT 
[   26.942351] Tainted: [B]=BAD_PAGE, [N]=TEST
[   26.942404] Hardware name: linux,dummy-virt (DT)
[   26.942550] Call trace:
[   26.942575]  show_stack+0x20/0x38 (C)
[   26.942625]  dump_stack_lvl+0x8c/0xd0
[   26.942726]  print_report+0x118/0x608
[   26.942776]  kasan_report+0xdc/0x128
[   26.942822]  kasan_check_range+0x100/0x1a8
[   26.942869]  __asan_memset+0x34/0x78
[   26.942919]  kmalloc_uaf_memset+0x170/0x310
[   26.943181]  kunit_try_run_case+0x170/0x3f0
[   26.943231]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   26.943284]  kthread+0x328/0x630
[   26.943326]  ret_from_fork+0x10/0x20
[   26.943371] 
[   26.943390] Allocated by task 198:
[   26.943422]  kasan_save_stack+0x3c/0x68
[   26.943625]  kasan_save_track+0x20/0x40
[   26.944010]  kasan_save_alloc_info+0x40/0x58
[   26.944189]  __kasan_kmalloc+0xd4/0xd8
[   26.944659]  __kmalloc_cache_noprof+0x16c/0x3c0
[   26.945006]  kmalloc_uaf_memset+0xb8/0x310
[   26.945068]  kunit_try_run_case+0x170/0x3f0
[   26.945106]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   26.945150]  kthread+0x328/0x630
[   26.945182]  ret_from_fork+0x10/0x20
[   26.945244] 
[   26.945264] Freed by task 198:
[   26.945319]  kasan_save_stack+0x3c/0x68
[   26.945455]  kasan_save_track+0x20/0x40
[   26.945641]  kasan_save_free_info+0x4c/0x78
[   26.945853]  __kasan_slab_free+0x6c/0x98
[   26.945981]  kfree+0x214/0x3c8
[   26.946015]  kmalloc_uaf_memset+0x11c/0x310
[   26.946072]  kunit_try_run_case+0x170/0x3f0
[   26.946133]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   26.946216]  kthread+0x328/0x630
[   26.946400]  ret_from_fork+0x10/0x20
[   26.946582] 
[   26.946603] The buggy address belongs to the object at fff00000c5753700
[   26.946603]  which belongs to the cache kmalloc-64 of size 64
[   26.947164] The buggy address is located 0 bytes inside of
[   26.947164]  freed 64-byte region [fff00000c5753700, fff00000c5753740)
[   26.947280] 
[   26.947370] The buggy address belongs to the physical page:
[   26.947399] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105753
[   26.947574] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   26.947635] page_type: f5(slab)
[   26.947673] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000
[   26.947814] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   26.947857] page dumped because: kasan: bad access detected
[   26.947889] 
[   26.948051] Memory state around the buggy address:
[   26.948261]  fff00000c5753600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   26.948315]  fff00000c5753680: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   26.948379] >fff00000c5753700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   26.948656]                    ^
[   26.948719]  fff00000c5753780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.948790]  fff00000c5753800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   26.948884] ==================================================================
Metadata Full log Test run details 

[   22.390084] ==================================================================
[   22.390513] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360
[   22.391082] Write of size 33 at addr ffff888103ae5280 by task kunit_try_catch/215
[   22.391814] 
[   22.391987] CPU: 1 UID: 0 PID: 215 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc3-next-20250626 #1 PREEMPT(voluntary) 
[   22.392040] Tainted: [B]=BAD_PAGE, [N]=TEST
[   22.392177] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   22.392202] Call Trace:
[   22.392216]  <TASK>
[   22.392248]  dump_stack_lvl+0x73/0xb0
[   22.392280]  print_report+0xd1/0x650
[   22.392302]  ? __virt_addr_valid+0x1db/0x2d0
[   22.392326]  ? kmalloc_uaf_memset+0x1a3/0x360
[   22.392346]  ? kasan_complete_mode_report_info+0x64/0x200
[   22.392370]  ? kmalloc_uaf_memset+0x1a3/0x360
[   22.392390]  kasan_report+0x141/0x180
[   22.392411]  ? kmalloc_uaf_memset+0x1a3/0x360
[   22.392435]  kasan_check_range+0x10c/0x1c0
[   22.392457]  __asan_memset+0x27/0x50
[   22.392480]  kmalloc_uaf_memset+0x1a3/0x360
[   22.392500]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   22.392522]  ? __pfx_kmalloc_uaf_memset+0x10/0x10
[   22.392546]  kunit_try_run_case+0x1a5/0x480
[   22.392570]  ? __pfx_kunit_try_run_case+0x10/0x10
[   22.392592]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   22.392618]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   22.392643]  ? __kthread_parkme+0x82/0x180
[   22.392663]  ? preempt_count_sub+0x50/0x80
[   22.392686]  ? __pfx_kunit_try_run_case+0x10/0x10
[   22.392709]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   22.392732]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   22.392755]  kthread+0x337/0x6f0
[   22.392774]  ? trace_preempt_on+0x20/0xc0
[   22.392809]  ? __pfx_kthread+0x10/0x10
[   22.392829]  ? _raw_spin_unlock_irq+0x47/0x80
[   22.392853]  ? calculate_sigpending+0x7b/0xa0
[   22.392875]  ? __pfx_kthread+0x10/0x10
[   22.392897]  ret_from_fork+0x116/0x1d0
[   22.392917]  ? __pfx_kthread+0x10/0x10
[   22.392938]  ret_from_fork_asm+0x1a/0x30
[   22.392969]  </TASK>
[   22.392980] 
[   22.402434] Allocated by task 215:
[   22.402644]  kasan_save_stack+0x45/0x70
[   22.402959]  kasan_save_track+0x18/0x40
[   22.403359]  kasan_save_alloc_info+0x3b/0x50
[   22.403571]  __kasan_kmalloc+0xb7/0xc0
[   22.403904]  __kmalloc_cache_noprof+0x189/0x420
[   22.404254]  kmalloc_uaf_memset+0xa9/0x360
[   22.404437]  kunit_try_run_case+0x1a5/0x480
[   22.404740]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   22.405058]  kthread+0x337/0x6f0
[   22.405284]  ret_from_fork+0x116/0x1d0
[   22.405439]  ret_from_fork_asm+0x1a/0x30
[   22.405619] 
[   22.405709] Freed by task 215:
[   22.405841]  kasan_save_stack+0x45/0x70
[   22.406436]  kasan_save_track+0x18/0x40
[   22.406612]  kasan_save_free_info+0x3f/0x60
[   22.407110]  __kasan_slab_free+0x56/0x70
[   22.407312]  kfree+0x222/0x3f0
[   22.407428]  kmalloc_uaf_memset+0x12b/0x360
[   22.407633]  kunit_try_run_case+0x1a5/0x480
[   22.408431]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   22.408663]  kthread+0x337/0x6f0
[   22.408837]  ret_from_fork+0x116/0x1d0
[   22.409303]  ret_from_fork_asm+0x1a/0x30
[   22.409482] 
[   22.409580] The buggy address belongs to the object at ffff888103ae5280
[   22.409580]  which belongs to the cache kmalloc-64 of size 64
[   22.410069] The buggy address is located 0 bytes inside of
[   22.410069]  freed 64-byte region [ffff888103ae5280, ffff888103ae52c0)
[   22.410545] 
[   22.410632] The buggy address belongs to the physical page:
[   22.410862] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103ae5
[   22.411691] flags: 0x200000000000000(node=0|zone=2)
[   22.411885] page_type: f5(slab)
[   22.412413] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000
[   22.412843] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
[   22.413301] page dumped because: kasan: bad access detected
[   22.413597] 
[   22.413750] Memory state around the buggy address:
[   22.414333]  ffff888103ae5180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
[   22.414613]  ffff888103ae5200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   22.415327] >ffff888103ae5280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[   22.415633]                    ^
[   22.415956]  ffff888103ae5300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   22.416312]  ffff888103ae5380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   22.416681] ==================================================================
Metadata Full log Test run details