Date
July 17, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.390836] ================================================================== [ 16.390943] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 16.391015] Read of size 1 at addr fff00000c7898000 by task kunit_try_catch/148 [ 16.391297] [ 16.391417] CPU: 1 UID: 0 PID: 148 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 16.391506] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.391555] Hardware name: linux,dummy-virt (DT) [ 16.391690] Call trace: [ 16.391718] show_stack+0x20/0x38 (C) [ 16.392117] dump_stack_lvl+0x8c/0xd0 [ 16.392280] print_report+0x118/0x5d0 [ 16.392359] kasan_report+0xdc/0x128 [ 16.392635] __asan_report_load1_noabort+0x20/0x30 [ 16.392816] kmalloc_large_uaf+0x2cc/0x2f8 [ 16.392994] kunit_try_run_case+0x170/0x3f0 [ 16.393097] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.393309] kthread+0x328/0x630 [ 16.393494] ret_from_fork+0x10/0x20 [ 16.393722] [ 16.393750] The buggy address belongs to the physical page: [ 16.393784] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107898 [ 16.393930] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.394077] raw: 0bfffe0000000000 ffffc1ffc31e2708 fff00000da478c40 0000000000000000 [ 16.394128] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 16.394355] page dumped because: kasan: bad access detected [ 16.394543] [ 16.394630] Memory state around the buggy address: [ 16.394726] fff00000c7897f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.394772] fff00000c7897f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.394820] >fff00000c7898000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.395088] ^ [ 16.395240] fff00000c7898080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.395328] fff00000c7898100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.395425] ==================================================================
[ 11.751957] ================================================================== [ 11.752512] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 11.752896] Read of size 1 at addr ffff888102b2c000 by task kunit_try_catch/165 [ 11.753465] [ 11.753635] CPU: 1 UID: 0 PID: 165 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 11.753683] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.753749] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.753771] Call Trace: [ 11.753784] <TASK> [ 11.753800] dump_stack_lvl+0x73/0xb0 [ 11.753888] print_report+0xd1/0x610 [ 11.753913] ? __virt_addr_valid+0x1db/0x2d0 [ 11.753949] ? kmalloc_large_uaf+0x2f1/0x340 [ 11.753969] ? kasan_addr_to_slab+0x11/0xa0 [ 11.753988] ? kmalloc_large_uaf+0x2f1/0x340 [ 11.754009] kasan_report+0x141/0x180 [ 11.754030] ? kmalloc_large_uaf+0x2f1/0x340 [ 11.754069] __asan_report_load1_noabort+0x18/0x20 [ 11.754093] kmalloc_large_uaf+0x2f1/0x340 [ 11.754113] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 11.754134] ? __schedule+0x10cc/0x2b60 [ 11.754157] ? __pfx_read_tsc+0x10/0x10 [ 11.754177] ? ktime_get_ts64+0x86/0x230 [ 11.754201] kunit_try_run_case+0x1a5/0x480 [ 11.754230] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.754252] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.754275] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.754299] ? __kthread_parkme+0x82/0x180 [ 11.754319] ? preempt_count_sub+0x50/0x80 [ 11.754343] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.754366] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.754388] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.754411] kthread+0x337/0x6f0 [ 11.754429] ? trace_preempt_on+0x20/0xc0 [ 11.754452] ? __pfx_kthread+0x10/0x10 [ 11.754472] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.754492] ? calculate_sigpending+0x7b/0xa0 [ 11.754515] ? __pfx_kthread+0x10/0x10 [ 11.754536] ret_from_fork+0x116/0x1d0 [ 11.754553] ? __pfx_kthread+0x10/0x10 [ 11.754573] ret_from_fork_asm+0x1a/0x30 [ 11.754672] </TASK> [ 11.754681] [ 11.765161] The buggy address belongs to the physical page: [ 11.765418] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b2c [ 11.766186] flags: 0x200000000000000(node=0|zone=2) [ 11.766381] raw: 0200000000000000 ffffea00040acc08 ffff88815b139f80 0000000000000000 [ 11.766641] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 11.767339] page dumped because: kasan: bad access detected [ 11.768069] [ 11.768388] Memory state around the buggy address: [ 11.768853] ffff888102b2bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.769494] ffff888102b2bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.770098] >ffff888102b2c000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.770573] ^ [ 11.770690] ffff888102b2c080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.771263] ffff888102b2c100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.772139] ==================================================================