Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.547522] ================================================================== [ 16.547586] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 16.547630] Read of size 1 at addr fff00000c7800000 by task kunit_try_catch/148 [ 16.547676] [ 16.548816] CPU: 0 UID: 0 PID: 148 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 16.548956] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.549055] Hardware name: linux,dummy-virt (DT) [ 16.549104] Call trace: [ 16.549128] show_stack+0x20/0x38 (C) [ 16.549334] dump_stack_lvl+0x8c/0xd0 [ 16.549477] print_report+0x118/0x608 [ 16.549704] kasan_report+0xdc/0x128 [ 16.549781] __asan_report_load1_noabort+0x20/0x30 [ 16.550225] kmalloc_large_uaf+0x2cc/0x2f8 [ 16.550297] kunit_try_run_case+0x170/0x3f0 [ 16.550377] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.551120] kthread+0x328/0x630 [ 16.551270] ret_from_fork+0x10/0x20 [ 16.551320] [ 16.551341] The buggy address belongs to the physical page: [ 16.551398] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107800 [ 16.551755] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.552121] raw: 0bfffe0000000000 ffffc1ffc31e0108 fff00000da457c40 0000000000000000 [ 16.552213] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 16.552409] page dumped because: kasan: bad access detected [ 16.552587] [ 16.552611] Memory state around the buggy address: [ 16.552849] fff00000c77fff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.552971] fff00000c77fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.553124] >fff00000c7800000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.553242] ^ [ 16.553271] fff00000c7800080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.553323] fff00000c7800100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.553361] ==================================================================
[ 10.989591] ================================================================== [ 10.990632] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 10.990931] Read of size 1 at addr ffff8881029fc000 by task kunit_try_catch/166 [ 10.991244] [ 10.991417] CPU: 0 UID: 0 PID: 166 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 10.991458] Tainted: [B]=BAD_PAGE, [N]=TEST [ 10.991469] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 10.991488] Call Trace: [ 10.991500] <TASK> [ 10.991514] dump_stack_lvl+0x73/0xb0 [ 10.991540] print_report+0xd1/0x650 [ 10.991562] ? __virt_addr_valid+0x1db/0x2d0 [ 10.991583] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.991602] ? kasan_addr_to_slab+0x11/0xa0 [ 10.991622] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.991641] kasan_report+0x141/0x180 [ 10.991662] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.991687] __asan_report_load1_noabort+0x18/0x20 [ 10.991711] kmalloc_large_uaf+0x2f1/0x340 [ 10.991730] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 10.991752] ? __schedule+0x10cc/0x2b60 [ 10.991773] ? __pfx_read_tsc+0x10/0x10 [ 10.991792] ? ktime_get_ts64+0x86/0x230 [ 10.991815] kunit_try_run_case+0x1a5/0x480 [ 10.991838] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.991859] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 10.991880] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 10.991902] ? __kthread_parkme+0x82/0x180 [ 10.991921] ? preempt_count_sub+0x50/0x80 [ 10.991944] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.991966] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 10.991988] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 10.992009] kthread+0x337/0x6f0 [ 10.992028] ? trace_preempt_on+0x20/0xc0 [ 10.992051] ? __pfx_kthread+0x10/0x10 [ 10.992070] ? _raw_spin_unlock_irq+0x47/0x80 [ 10.992090] ? calculate_sigpending+0x7b/0xa0 [ 10.992127] ? __pfx_kthread+0x10/0x10 [ 10.992147] ret_from_fork+0x116/0x1d0 [ 10.992165] ? __pfx_kthread+0x10/0x10 [ 10.992184] ret_from_fork_asm+0x1a/0x30 [ 10.992214] </TASK> [ 10.992224] [ 10.999289] The buggy address belongs to the physical page: [ 10.999625] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029fc [ 10.999897] flags: 0x200000000000000(node=0|zone=2) [ 11.000071] raw: 0200000000000000 ffffea00040a8008 ffff88815b039f80 0000000000000000 [ 11.000365] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 11.000809] page dumped because: kasan: bad access detected [ 11.001055] [ 11.001254] Memory state around the buggy address: [ 11.001447] ffff8881029fbf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.001667] ffff8881029fbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.001982] >ffff8881029fc000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.002542] ^ [ 11.002676] ffff8881029fc080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.002987] ffff8881029fc100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.003345] ==================================================================