Date
July 8, 2025, 4:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.650992] ================================================================== [ 17.651370] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 17.651688] Read of size 1 at addr fff00000c5d30000 by task kunit_try_catch/150 [ 17.651915] [ 17.651952] CPU: 1 UID: 0 PID: 150 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT [ 17.652093] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.652118] Hardware name: linux,dummy-virt (DT) [ 17.652154] Call trace: [ 17.652214] show_stack+0x20/0x38 (C) [ 17.652262] dump_stack_lvl+0x8c/0xd0 [ 17.652308] print_report+0x118/0x608 [ 17.652360] kasan_report+0xdc/0x128 [ 17.652403] __asan_report_load1_noabort+0x20/0x30 [ 17.652450] kmalloc_large_uaf+0x2cc/0x2f8 [ 17.653275] kunit_try_run_case+0x170/0x3f0 [ 17.653676] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.653749] kthread+0x328/0x630 [ 17.653796] ret_from_fork+0x10/0x20 [ 17.653843] [ 17.653977] The buggy address belongs to the physical page: [ 17.654014] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d30 [ 17.654231] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.654317] raw: 0bfffe0000000000 fff00000da4a1e00 fff00000da4a1e00 0000000000000000 [ 17.654376] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 17.654534] page dumped because: kasan: bad access detected [ 17.654758] [ 17.654780] Memory state around the buggy address: [ 17.654855] fff00000c5d2ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.654897] fff00000c5d2ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.654950] >fff00000c5d30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 17.654985] ^ [ 17.655012] fff00000c5d30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 17.655103] fff00000c5d30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 17.655222] ==================================================================
[ 10.699351] ================================================================== [ 10.700259] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 10.700622] Read of size 1 at addr ffff888102d64000 by task kunit_try_catch/168 [ 10.700983] [ 10.701121] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.15.6-rc1 #1 PREEMPT(voluntary) [ 10.701167] Tainted: [B]=BAD_PAGE, [N]=TEST [ 10.701191] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 10.701221] Call Trace: [ 10.701234] <TASK> [ 10.701250] dump_stack_lvl+0x73/0xb0 [ 10.701277] print_report+0xd1/0x650 [ 10.701315] ? __virt_addr_valid+0x1db/0x2d0 [ 10.701337] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.701359] ? kasan_addr_to_slab+0x11/0xa0 [ 10.701380] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.701402] kasan_report+0x141/0x180 [ 10.701425] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.701461] __asan_report_load1_noabort+0x18/0x20 [ 10.701482] kmalloc_large_uaf+0x2f1/0x340 [ 10.701504] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 10.701537] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 10.701559] ? trace_hardirqs_on+0x37/0xe0 [ 10.701583] ? __pfx_read_tsc+0x10/0x10 [ 10.701603] ? ktime_get_ts64+0x86/0x230 [ 10.701630] kunit_try_run_case+0x1a5/0x480 [ 10.701651] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.701680] ? queued_spin_lock_slowpath+0x116/0xb40 [ 10.701705] ? __kthread_parkme+0x82/0x180 [ 10.701728] ? preempt_count_sub+0x50/0x80 [ 10.701763] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.701784] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 10.701807] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 10.701830] kthread+0x337/0x6f0 [ 10.701863] ? trace_preempt_on+0x20/0xc0 [ 10.701895] ? __pfx_kthread+0x10/0x10 [ 10.701914] ? _raw_spin_unlock_irq+0x47/0x80 [ 10.701936] ? calculate_sigpending+0x7b/0xa0 [ 10.701958] ? __pfx_kthread+0x10/0x10 [ 10.701977] ret_from_fork+0x41/0x80 [ 10.701997] ? __pfx_kthread+0x10/0x10 [ 10.702015] ret_from_fork_asm+0x1a/0x30 [ 10.702045] </TASK> [ 10.702056] [ 10.710127] The buggy address belongs to the physical page: [ 10.710368] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d64 [ 10.710792] flags: 0x200000000000000(node=0|zone=2) [ 10.710984] raw: 0200000000000000 ffffea00040b5a08 ffff88815b139a80 0000000000000000 [ 10.711389] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 10.711685] page dumped because: kasan: bad access detected [ 10.712093] [ 10.712218] Memory state around the buggy address: [ 10.712486] ffff888102d63f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.712827] ffff888102d63f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.713116] >ffff888102d64000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.713371] ^ [ 10.713587] ffff888102d64080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.714164] ffff888102d64100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.714385] ==================================================================