Date
July 10, 2025, 9:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.350058] ================================================================== [ 29.350117] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350 [ 29.350184] Read of size 1 at addr fff00000c9ac0000 by task kunit_try_catch/185 [ 29.350240] [ 29.350269] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250710 #1 PREEMPT [ 29.350605] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.350634] Hardware name: linux,dummy-virt (DT) [ 29.350673] Call trace: [ 29.350710] show_stack+0x20/0x38 (C) [ 29.350763] dump_stack_lvl+0x8c/0xd0 [ 29.350817] print_report+0x118/0x5d0 [ 29.351050] kasan_report+0xdc/0x128 [ 29.351097] __asan_report_load1_noabort+0x20/0x30 [ 29.351159] page_alloc_uaf+0x328/0x350 [ 29.351206] kunit_try_run_case+0x170/0x3f0 [ 29.351255] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.351320] kthread+0x328/0x630 [ 29.351536] ret_from_fork+0x10/0x20 [ 29.351639] [ 29.351672] The buggy address belongs to the physical page: [ 29.351828] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109ac0 [ 29.352028] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.352683] page_type: f0(buddy) [ 29.352774] raw: 0bfffe0000000000 fff00000ff6161b0 fff00000ff6161b0 0000000000000000 [ 29.352825] raw: 0000000000000000 0000000000000006 00000000f0000000 0000000000000000 [ 29.352894] page dumped because: kasan: bad access detected [ 29.352935] [ 29.352959] Memory state around the buggy address: [ 29.353048] fff00000c9abff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.353091] fff00000c9abff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.353141] >fff00000c9ac0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 29.353180] ^ [ 29.353227] fff00000c9ac0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 29.353271] fff00000c9ac0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 29.353312] ==================================================================
[ 24.626676] ================================================================== [ 24.628419] BUG: KASAN: use-after-free in page_alloc_uaf+0x356/0x3d0 [ 24.629036] Read of size 1 at addr ffff888106200000 by task kunit_try_catch/202 [ 24.629633] [ 24.629745] CPU: 1 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250710 #1 PREEMPT(voluntary) [ 24.629805] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.629818] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.629840] Call Trace: [ 24.629854] <TASK> [ 24.629872] dump_stack_lvl+0x73/0xb0 [ 24.629902] print_report+0xd1/0x610 [ 24.629925] ? __virt_addr_valid+0x1db/0x2d0 [ 24.629949] ? page_alloc_uaf+0x356/0x3d0 [ 24.629970] ? kasan_addr_to_slab+0x11/0xa0 [ 24.629990] ? page_alloc_uaf+0x356/0x3d0 [ 24.630011] kasan_report+0x141/0x180 [ 24.630033] ? page_alloc_uaf+0x356/0x3d0 [ 24.630058] __asan_report_load1_noabort+0x18/0x20 [ 24.630082] page_alloc_uaf+0x356/0x3d0 [ 24.630103] ? __pfx_page_alloc_uaf+0x10/0x10 [ 24.630125] ? __schedule+0x10cc/0x2b60 [ 24.630147] ? __pfx_read_tsc+0x10/0x10 [ 24.630169] ? ktime_get_ts64+0x86/0x230 [ 24.630194] kunit_try_run_case+0x1a5/0x480 [ 24.630217] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.630237] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.630259] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.630281] ? __kthread_parkme+0x82/0x180 [ 24.630302] ? preempt_count_sub+0x50/0x80 [ 24.630325] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.630349] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.630373] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.630398] kthread+0x337/0x6f0 [ 24.630419] ? trace_preempt_on+0x20/0xc0 [ 24.630442] ? __pfx_kthread+0x10/0x10 [ 24.630463] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.630484] ? calculate_sigpending+0x7b/0xa0 [ 24.630570] ? __pfx_kthread+0x10/0x10 [ 24.630592] ret_from_fork+0x116/0x1d0 [ 24.630611] ? __pfx_kthread+0x10/0x10 [ 24.630631] ret_from_fork_asm+0x1a/0x30 [ 24.630662] </TASK> [ 24.630675] [ 24.640017] The buggy address belongs to the physical page: [ 24.640305] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106200 [ 24.640798] flags: 0x200000000000000(node=0|zone=2) [ 24.641486] page_type: f0(buddy) [ 24.641969] raw: 0200000000000000 ffff88817fffc5c8 ffff88817fffc5c8 0000000000000000 [ 24.642286] raw: 0000000000000000 0000000000000009 00000000f0000000 0000000000000000 [ 24.642789] page dumped because: kasan: bad access detected [ 24.643235] [ 24.643477] Memory state around the buggy address: [ 24.643869] ffff8881061fff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.644360] ffff8881061fff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.644813] >ffff888106200000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.645272] ^ [ 24.645418] ffff888106200080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.646225] ffff888106200100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 24.646765] ==================================================================