Date
July 25, 2025, 3:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.169325] ================================================================== [ 32.169390] BUG: KASAN: use-after-free in page_alloc_uaf+0x328/0x350 [ 32.169452] Read of size 1 at addr fff00000c9b40000 by task kunit_try_catch/186 [ 32.169501] [ 32.169536] CPU: 1 UID: 0 PID: 186 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250725 #1 PREEMPT [ 32.169657] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.169723] Hardware name: linux,dummy-virt (DT) [ 32.169756] Call trace: [ 32.169788] show_stack+0x20/0x38 (C) [ 32.170117] dump_stack_lvl+0x8c/0xd0 [ 32.170412] print_report+0x118/0x5e8 [ 32.170705] kasan_report+0xdc/0x128 [ 32.171012] __asan_report_load1_noabort+0x20/0x30 [ 32.171091] page_alloc_uaf+0x328/0x350 [ 32.171395] kunit_try_run_case+0x170/0x3f0 [ 32.171969] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.172430] kthread+0x328/0x630 [ 32.172499] ret_from_fork+0x10/0x20 [ 32.173635] [ 32.173743] The buggy address belongs to the physical page: [ 32.173863] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109b40 [ 32.173942] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.174025] page_type: f0(buddy) [ 32.174386] raw: 0bfffe0000000000 fff00000ff6161b0 fff00000ff6161b0 0000000000000000 [ 32.174543] raw: 0000000000000000 0000000000000006 00000000f0000000 0000000000000000 [ 32.174851] page dumped because: kasan: bad access detected [ 32.175274] [ 32.175402] Memory state around the buggy address: [ 32.175449] fff00000c9b3ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.175772] fff00000c9b3ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.175926] >fff00000c9b40000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.176041] ^ [ 32.176285] fff00000c9b40080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.176695] fff00000c9b40100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 32.176740] ==================================================================
[ 25.245937] ================================================================== [ 25.246522] BUG: KASAN: use-after-free in page_alloc_uaf+0x356/0x3d0 [ 25.246816] Read of size 1 at addr ffff8881062f0000 by task kunit_try_catch/203 [ 25.247300] [ 25.247420] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250725 #1 PREEMPT(voluntary) [ 25.247468] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.247480] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.247500] Call Trace: [ 25.247645] <TASK> [ 25.247676] dump_stack_lvl+0x73/0xb0 [ 25.247705] print_report+0xd1/0x640 [ 25.247728] ? __virt_addr_valid+0x1db/0x2d0 [ 25.247753] ? page_alloc_uaf+0x356/0x3d0 [ 25.247775] ? kasan_addr_to_slab+0x11/0xa0 [ 25.247797] ? page_alloc_uaf+0x356/0x3d0 [ 25.247819] kasan_report+0x141/0x180 [ 25.247846] ? page_alloc_uaf+0x356/0x3d0 [ 25.247874] __asan_report_load1_noabort+0x18/0x20 [ 25.247899] page_alloc_uaf+0x356/0x3d0 [ 25.247922] ? __pfx_page_alloc_uaf+0x10/0x10 [ 25.247956] ? __schedule+0x10da/0x2b60 [ 25.247978] ? __pfx_read_tsc+0x10/0x10 [ 25.248055] ? ktime_get_ts64+0x86/0x230 [ 25.248082] kunit_try_run_case+0x1a5/0x480 [ 25.248107] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.248130] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.248153] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.248179] ? __kthread_parkme+0x82/0x180 [ 25.248200] ? preempt_count_sub+0x50/0x80 [ 25.248224] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.248249] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.248273] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.248298] kthread+0x337/0x6f0 [ 25.248318] ? trace_preempt_on+0x20/0xc0 [ 25.248342] ? __pfx_kthread+0x10/0x10 [ 25.248363] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.248387] ? calculate_sigpending+0x7b/0xa0 [ 25.248411] ? __pfx_kthread+0x10/0x10 [ 25.248434] ret_from_fork+0x116/0x1d0 [ 25.248454] ? __pfx_kthread+0x10/0x10 [ 25.248475] ret_from_fork_asm+0x1a/0x30 [ 25.248507] </TASK> [ 25.248518] [ 25.257520] The buggy address belongs to the physical page: [ 25.258224] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1062f0 [ 25.258507] flags: 0x200000000000000(node=0|zone=2) [ 25.258714] page_type: f0(buddy) [ 25.259439] raw: 0200000000000000 ffff88817fffb460 ffff88817fffb460 0000000000000000 [ 25.260103] raw: 0000000000000000 0000000000000004 00000000f0000000 0000000000000000 [ 25.260427] page dumped because: kasan: bad access detected [ 25.260635] [ 25.260710] Memory state around the buggy address: [ 25.261187] ffff8881062eff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 25.261493] ffff8881062eff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 25.261782] >ffff8881062f0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 25.262807] ^ [ 25.262936] ffff8881062f0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 25.263567] ffff8881062f0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 25.263938] ==================================================================