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Date
June 2, 2025, 2:11 p.m.

Environment
e850-96
qemu-arm64
qemu-x86_64 

[   19.736288] ==================================================================
[   19.750528] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350
[   19.756861] Read of size 1 at addr ffff0008065f0000 by task kunit_try_catch/201
[   19.764151] 
[   19.765636] CPU: 5 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G    B            N  6.15.1-rc1 #1 PREEMPT 
[   19.765689] Tainted: [B]=BAD_PAGE, [N]=TEST
[   19.765706] Hardware name: WinLink E850-96 board (DT)
[   19.765728] Call trace:
[   19.765742]  show_stack+0x20/0x38 (C)
[   19.765779]  dump_stack_lvl+0x8c/0xd0
[   19.765813]  print_report+0x118/0x608
[   19.765843]  kasan_report+0xdc/0x128
[   19.765875]  __asan_report_load1_noabort+0x20/0x30
[   19.765908]  page_alloc_uaf+0x328/0x350
[   19.765944]  kunit_try_run_case+0x170/0x3f0
[   19.765980]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   19.766021]  kthread+0x328/0x630
[   19.766057]  ret_from_fork+0x10/0x20
[   19.766090] 
[   19.828128] The buggy address belongs to the physical page:
[   19.833686] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8865f0
[   19.841671] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   19.848178] page_type: f0(buddy)
[   19.851403] raw: 0bfffe0000000000 ffff00087f61bbe0 ffff00087f61bbe0 0000000000000000
[   19.859123] raw: 0000000000000000 0000000000000004 00000000f0000000 0000000000000000
[   19.866841] page dumped because: kasan: bad access detected
[   19.872396] 
[   19.873871] Memory state around the buggy address:
[   19.878652]  ffff0008065eff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   19.885854]  ffff0008065eff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   19.893059] >ffff0008065f0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   19.900260]                    ^
[   19.903475]  ffff0008065f0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   19.910680]  ffff0008065f0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   19.917883] ==================================================================
Metadata Full log Test run details 

[   17.502805] ==================================================================
[   17.502872] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350
[   17.502940] Read of size 1 at addr fff00000c77b0000 by task kunit_try_catch/157
[   17.502990] 
[   17.503036] CPU: 1 UID: 0 PID: 157 Comm: kunit_try_catch Tainted: G    B            N  6.15.1-rc1 #1 PREEMPT 
[   17.503119] Tainted: [B]=BAD_PAGE, [N]=TEST
[   17.503144] Hardware name: linux,dummy-virt (DT)
[   17.503176] Call trace:
[   17.503200]  show_stack+0x20/0x38 (C)
[   17.503258]  dump_stack_lvl+0x8c/0xd0
[   17.503312]  print_report+0x118/0x608
[   17.504200]  kasan_report+0xdc/0x128
[   17.504263]  __asan_report_load1_noabort+0x20/0x30
[   17.504471]  page_alloc_uaf+0x328/0x350
[   17.504528]  kunit_try_run_case+0x170/0x3f0
[   17.505067]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   17.505128]  kthread+0x328/0x630
[   17.505176]  ret_from_fork+0x10/0x20
[   17.505228] 
[   17.505250] The buggy address belongs to the physical page:
[   17.505283] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1077b0
[   17.505337] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   17.505403] page_type: f0(buddy)
[   17.505446] raw: 0bfffe0000000000 fff00000ff616020 fff00000ff616020 0000000000000000
[   17.505523] raw: 0000000000000000 0000000000000004 00000000f0000000 0000000000000000
[   17.505563] page dumped because: kasan: bad access detected
[   17.505594] 
[   17.505617] Memory state around the buggy address:
[   17.505653]  fff00000c77aff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   17.505697]  fff00000c77aff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   17.505739] >fff00000c77b0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   17.505776]                    ^
[   17.505806]  fff00000c77b0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   17.505848]  fff00000c77b0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   17.505885] ==================================================================
Metadata Full log Test run details 

[   15.851458] ==================================================================
[   15.852341] BUG: KASAN: use-after-free in page_alloc_uaf+0x356/0x3d0
[   15.853117] Read of size 1 at addr ffff888103a00000 by task kunit_try_catch/175
[   15.854342] 
[   15.854535] CPU: 0 UID: 0 PID: 175 Comm: kunit_try_catch Tainted: G    B            N  6.15.1-rc1 #1 PREEMPT(voluntary) 
[   15.854650] Tainted: [B]=BAD_PAGE, [N]=TEST
[   15.854677] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   15.854718] Call Trace:
[   15.854744]  <TASK>
[   15.854796]  dump_stack_lvl+0x73/0xb0
[   15.854859]  print_report+0xd1/0x650
[   15.854904]  ? __virt_addr_valid+0x1db/0x2d0
[   15.854947]  ? page_alloc_uaf+0x356/0x3d0
[   15.854983]  ? kasan_addr_to_slab+0x11/0xa0
[   15.855062]  ? page_alloc_uaf+0x356/0x3d0
[   15.855103]  kasan_report+0x141/0x180
[   15.855149]  ? page_alloc_uaf+0x356/0x3d0
[   15.855471]  __asan_report_load1_noabort+0x18/0x20
[   15.855537]  page_alloc_uaf+0x356/0x3d0
[   15.855572]  ? __pfx_page_alloc_uaf+0x10/0x10
[   15.855604]  ? __schedule+0x10cc/0x2b30
[   15.855655]  ? __pfx_read_tsc+0x10/0x10
[   15.855689]  ? ktime_get_ts64+0x86/0x230
[   15.855733]  kunit_try_run_case+0x1a5/0x480
[   15.855792]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.855827]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   15.855868]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   15.855945]  ? __kthread_parkme+0x82/0x180
[   15.855991]  ? preempt_count_sub+0x50/0x80
[   15.856022]  ? __pfx_kunit_try_run_case+0x10/0x10
[   15.856049]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   15.856075]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   15.856100]  kthread+0x337/0x6f0
[   15.856147]  ? trace_preempt_on+0x20/0xc0
[   15.856181]  ? __pfx_kthread+0x10/0x10
[   15.856217]  ? _raw_spin_unlock_irq+0x47/0x80
[   15.856253]  ? calculate_sigpending+0x7b/0xa0
[   15.856294]  ? __pfx_kthread+0x10/0x10
[   15.856319]  ret_from_fork+0x41/0x80
[   15.856344]  ? __pfx_kthread+0x10/0x10
[   15.856364]  ret_from_fork_asm+0x1a/0x30
[   15.856399]  </TASK>
[   15.856414] 
[   15.870979] The buggy address belongs to the physical page:
[   15.871893] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a00
[   15.872581] flags: 0x200000000000000(node=0|zone=2)
[   15.873109] page_type: f0(buddy)
[   15.873452] raw: 0200000000000000 ffff88817fffb548 ffff88817fffb548 0000000000000000
[   15.874164] raw: 0000000000000000 0000000000000009 00000000f0000000 0000000000000000
[   15.874595] page dumped because: kasan: bad access detected
[   15.874983] 
[   15.875101] Memory state around the buggy address:
[   15.875273]  ffff8881039fff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   15.876003]  ffff8881039fff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   15.876956] >ffff888103a00000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   15.877489]                    ^
[   15.878246]  ffff888103a00080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   15.878807]  ffff888103a00100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   15.879037] ==================================================================
Metadata Full log Test run details