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Date
July 15, 2025, 11:35 a.m.

Environment
e850-96
qemu-arm64
qemu-x86_64 

[   38.841736] ==================================================================
[   38.856032] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350
[   38.862366] Read of size 1 at addr ffff0008084c0000 by task kunit_try_catch/235
[   38.869659] 
[   38.871144] CPU: 2 UID: 0 PID: 235 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT 
[   38.871202] Tainted: [B]=BAD_PAGE, [N]=TEST
[   38.871220] Hardware name: WinLink E850-96 board (DT)
[   38.871242] Call trace:
[   38.871254]  show_stack+0x20/0x38 (C)
[   38.871292]  dump_stack_lvl+0x8c/0xd0
[   38.871327]  print_report+0x118/0x5d0
[   38.871356]  kasan_report+0xdc/0x128
[   38.871380]  __asan_report_load1_noabort+0x20/0x30
[   38.871412]  page_alloc_uaf+0x328/0x350
[   38.871443]  kunit_try_run_case+0x170/0x3f0
[   38.871475]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   38.871511]  kthread+0x328/0x630
[   38.871542]  ret_from_fork+0x10/0x20
[   38.871576] 
[   38.934851] The buggy address belongs to the physical page:
[   38.940407] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8884c0
[   38.948390] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   38.954901] page_type: f0(buddy)
[   38.958122] raw: 0bfffe0000000000 ffff00087f61bd70 ffff00087f61bd70 0000000000000000
[   38.965842] raw: 0000000000000000 0000000000000006 00000000f0000000 0000000000000000
[   38.973563] page dumped because: kasan: bad access detected
[   38.979117] 
[   38.980592] Memory state around the buggy address:
[   38.985373]  ffff0008084bff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   38.992576]  ffff0008084bff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   38.999782] >ffff0008084c0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   39.006981]                    ^
[   39.010196]  ffff0008084c0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   39.017401]  ffff0008084c0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   39.024604] ==================================================================
Metadata Full log Test run details 

[   30.428706] ==================================================================
[   30.428775] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350
[   30.428977] Read of size 1 at addr fff00000c9a60000 by task kunit_try_catch/186
[   30.429047] 
[   30.429185] CPU: 0 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT 
[   30.429314] Tainted: [B]=BAD_PAGE, [N]=TEST
[   30.429662] Hardware name: linux,dummy-virt (DT)
[   30.429788] Call trace:
[   30.429813]  show_stack+0x20/0x38 (C)
[   30.429882]  dump_stack_lvl+0x8c/0xd0
[   30.429941]  print_report+0x118/0x5d0
[   30.429987]  kasan_report+0xdc/0x128
[   30.430183]  __asan_report_load1_noabort+0x20/0x30
[   30.430331]  page_alloc_uaf+0x328/0x350
[   30.430575]  kunit_try_run_case+0x170/0x3f0
[   30.430701]  kunit_generic_run_threadfn_adapter+0x88/0x100
[   30.430913]  kthread+0x328/0x630
[   30.431161]  ret_from_fork+0x10/0x20
[   30.431448] 
[   30.431530] The buggy address belongs to the physical page:
[   30.431653] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a60
[   30.431780] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)
[   30.432019] page_type: f0(buddy)
[   30.432252] raw: 0bfffe0000000000 fff00000ff616148 fff00000ff616148 0000000000000000
[   30.432325] raw: 0000000000000000 0000000000000005 00000000f0000000 0000000000000000
[   30.432485] page dumped because: kasan: bad access detected
[   30.432566] 
[   30.432633] Memory state around the buggy address:
[   30.432722]  fff00000c9a5ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.432796]  fff00000c9a5ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.432869] >fff00000c9a60000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.432906]                    ^
[   30.433123]  fff00000c9a60080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.433417]  fff00000c9a60100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   30.433633] ==================================================================
Metadata Full log Test run details 

[   23.659183] ==================================================================
[   23.660000] BUG: KASAN: use-after-free in page_alloc_uaf+0x356/0x3d0
[   23.660304] Read of size 1 at addr ffff8881061f0000 by task kunit_try_catch/202
[   23.660651] 
[   23.660756] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G    B            N  6.16.0-rc6-next-20250715 #1 PREEMPT(voluntary) 
[   23.660808] Tainted: [B]=BAD_PAGE, [N]=TEST
[   23.660822] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[   23.660844] Call Trace:
[   23.660858]  <TASK>
[   23.660876]  dump_stack_lvl+0x73/0xb0
[   23.660912]  print_report+0xd1/0x610
[   23.660940]  ? __virt_addr_valid+0x1db/0x2d0
[   23.660969]  ? page_alloc_uaf+0x356/0x3d0
[   23.660994]  ? kasan_addr_to_slab+0x11/0xa0
[   23.661019]  ? page_alloc_uaf+0x356/0x3d0
[   23.661046]  kasan_report+0x141/0x180
[   23.661073]  ? page_alloc_uaf+0x356/0x3d0
[   23.661106]  __asan_report_load1_noabort+0x18/0x20
[   23.661134]  page_alloc_uaf+0x356/0x3d0
[   23.661160]  ? __pfx_page_alloc_uaf+0x10/0x10
[   23.661188]  ? __schedule+0x10cc/0x2b60
[   23.661214]  ? __pfx_read_tsc+0x10/0x10
[   23.661240]  ? ktime_get_ts64+0x86/0x230
[   23.661271]  kunit_try_run_case+0x1a5/0x480
[   23.661300]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.661325]  ? _raw_spin_lock_irqsave+0xa1/0x100
[   23.661352]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[   23.661379]  ? __kthread_parkme+0x82/0x180
[   23.661405]  ? preempt_count_sub+0x50/0x80
[   23.661434]  ? __pfx_kunit_try_run_case+0x10/0x10
[   23.661462]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[   23.661493]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[   23.661870]  kthread+0x337/0x6f0
[   23.661905]  ? trace_preempt_on+0x20/0xc0
[   23.661935]  ? __pfx_kthread+0x10/0x10
[   23.661960]  ? _raw_spin_unlock_irq+0x47/0x80
[   23.661989]  ? calculate_sigpending+0x7b/0xa0
[   23.662019]  ? __pfx_kthread+0x10/0x10
[   23.662046]  ret_from_fork+0x116/0x1d0
[   23.662070]  ? __pfx_kthread+0x10/0x10
[   23.662096]  ret_from_fork_asm+0x1a/0x30
[   23.662136]  </TASK>
[   23.662148] 
[   23.669924] The buggy address belongs to the physical page:
[   23.670112] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1061f0
[   23.670508] flags: 0x200000000000000(node=0|zone=2)
[   23.670766] page_type: f0(buddy)
[   23.671019] raw: 0200000000000000 ffff88817fffc460 ffff88817fffc460 0000000000000000
[   23.671555] raw: 0000000000000000 0000000000000004 00000000f0000000 0000000000000000
[   23.671951] page dumped because: kasan: bad access detected
[   23.672268] 
[   23.672352] Memory state around the buggy address:
[   23.672576]  ffff8881061eff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   23.673049]  ffff8881061eff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   23.673344] >ffff8881061f0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   23.673737]                    ^
[   23.673907]  ffff8881061f0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   23.674213]  ffff8881061f0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   23.674487] ==================================================================
Metadata Full log Test run details