Date
July 16, 2025, 12:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 30.380930] ================================================================== [ 30.380995] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 30.381124] Read of size 1 at addr fff00000c9a08000 by task kunit_try_catch/179 [ 30.381190] [ 30.381220] CPU: 0 UID: 0 PID: 179 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT [ 30.381303] Tainted: [B]=BAD_PAGE, [N]=TEST [ 30.381349] Hardware name: linux,dummy-virt (DT) [ 30.381385] Call trace: [ 30.381407] show_stack+0x20/0x38 (C) [ 30.381452] dump_stack_lvl+0x8c/0xd0 [ 30.381498] print_report+0x118/0x5d0 [ 30.381553] kasan_report+0xdc/0x128 [ 30.381594] __asan_report_load1_noabort+0x20/0x30 [ 30.381641] kmalloc_large_uaf+0x2cc/0x2f8 [ 30.381686] kunit_try_run_case+0x170/0x3f0 [ 30.381732] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 30.381787] kthread+0x328/0x630 [ 30.381829] ret_from_fork+0x10/0x20 [ 30.381880] [ 30.381905] The buggy address belongs to the physical page: [ 30.381935] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a08 [ 30.381986] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 30.382054] raw: 0bfffe0000000000 fff00000da450d00 fff00000da450d00 0000000000000000 [ 30.382103] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 30.382142] page dumped because: kasan: bad access detected [ 30.382173] [ 30.382190] Memory state around the buggy address: [ 30.382220] fff00000c9a07f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.382262] fff00000c9a07f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.382304] >fff00000c9a08000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 30.382341] ^ [ 30.382374] fff00000c9a08080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 30.382427] fff00000c9a08100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 30.382465] ==================================================================
[ 22.789363] ================================================================== [ 22.790510] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 22.791007] Read of size 1 at addr ffff8881060ec000 by task kunit_try_catch/197 [ 22.791493] [ 22.791664] CPU: 1 UID: 0 PID: 197 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT(voluntary) [ 22.791717] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.791729] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.791750] Call Trace: [ 22.791763] <TASK> [ 22.791779] dump_stack_lvl+0x73/0xb0 [ 22.791807] print_report+0xd1/0x610 [ 22.791828] ? __virt_addr_valid+0x1db/0x2d0 [ 22.791851] ? kmalloc_large_uaf+0x2f1/0x340 [ 22.791870] ? kasan_addr_to_slab+0x11/0xa0 [ 22.791890] ? kmalloc_large_uaf+0x2f1/0x340 [ 22.791910] kasan_report+0x141/0x180 [ 22.791931] ? kmalloc_large_uaf+0x2f1/0x340 [ 22.791955] __asan_report_load1_noabort+0x18/0x20 [ 22.791978] kmalloc_large_uaf+0x2f1/0x340 [ 22.791999] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 22.792020] ? __schedule+0x10c6/0x2b60 [ 22.792042] ? __pfx_read_tsc+0x10/0x10 [ 22.792064] ? ktime_get_ts64+0x86/0x230 [ 22.792089] kunit_try_run_case+0x1a5/0x480 [ 22.792113] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.792155] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.792177] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.792199] ? __kthread_parkme+0x82/0x180 [ 22.792219] ? preempt_count_sub+0x50/0x80 [ 22.792242] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.792273] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.792299] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.792325] kthread+0x337/0x6f0 [ 22.792344] ? trace_preempt_on+0x20/0xc0 [ 22.792368] ? __pfx_kthread+0x10/0x10 [ 22.792388] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.792407] ? calculate_sigpending+0x7b/0xa0 [ 22.792431] ? __pfx_kthread+0x10/0x10 [ 22.792452] ret_from_fork+0x116/0x1d0 [ 22.792470] ? __pfx_kthread+0x10/0x10 [ 22.792490] ret_from_fork_asm+0x1a/0x30 [ 22.792520] </TASK> [ 22.792546] [ 22.801104] The buggy address belongs to the physical page: [ 22.801389] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1060ec [ 22.802056] flags: 0x200000000000000(node=0|zone=2) [ 22.802501] raw: 0200000000000000 ffffea0004183c08 ffff88815b139fc0 0000000000000000 [ 22.803329] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 22.804047] page dumped because: kasan: bad access detected [ 22.804619] [ 22.804773] Memory state around the buggy address: [ 22.805234] ffff8881060ebf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.805906] ffff8881060ebf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.806409] >ffff8881060ec000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 22.806637] ^ [ 22.806924] ffff8881060ec080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 22.807612] ffff8881060ec100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 22.808314] ==================================================================