Date
July 22, 2025, 2:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.927023] ================================================================== [ 16.927459] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 16.927615] Read of size 1 at addr fff00000c7888000 by task kunit_try_catch/150 [ 16.927730] [ 16.927807] CPU: 0 UID: 0 PID: 150 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT [ 16.927949] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.927978] Hardware name: linux,dummy-virt (DT) [ 16.928008] Call trace: [ 16.928031] show_stack+0x20/0x38 (C) [ 16.928098] dump_stack_lvl+0x8c/0xd0 [ 16.928146] print_report+0x118/0x5d0 [ 16.928191] kasan_report+0xdc/0x128 [ 16.928242] __asan_report_load1_noabort+0x20/0x30 [ 16.928315] kmalloc_large_uaf+0x2cc/0x2f8 [ 16.928362] kunit_try_run_case+0x170/0x3f0 [ 16.928409] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.928456] kthread+0x328/0x630 [ 16.928515] ret_from_fork+0x10/0x20 [ 16.928566] [ 16.928587] The buggy address belongs to the physical page: [ 16.928617] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107888 [ 16.928666] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.928734] raw: 0bfffe0000000000 ffffc1ffc31e2308 fff00000da47fe00 0000000000000000 [ 16.928795] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 16.928834] page dumped because: kasan: bad access detected [ 16.928863] [ 16.928881] Memory state around the buggy address: [ 16.928920] fff00000c7887f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.928972] fff00000c7887f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.929022] >fff00000c7888000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.929065] ^ [ 16.929101] fff00000c7888080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.929142] fff00000c7888100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 16.929178] ==================================================================
[ 10.571479] ================================================================== [ 10.572341] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 10.573493] Read of size 1 at addr ffff888103c80000 by task kunit_try_catch/168 [ 10.574026] [ 10.574122] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.15.8-rc1 #1 PREEMPT(voluntary) [ 10.574168] Tainted: [B]=BAD_PAGE, [N]=TEST [ 10.574178] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 10.574199] Call Trace: [ 10.574211] <TASK> [ 10.574236] dump_stack_lvl+0x73/0xb0 [ 10.574263] print_report+0xd1/0x610 [ 10.574285] ? __virt_addr_valid+0x1db/0x2d0 [ 10.574306] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.574326] ? kasan_addr_to_slab+0x11/0xa0 [ 10.574369] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.574391] kasan_report+0x141/0x180 [ 10.574412] ? kmalloc_large_uaf+0x2f1/0x340 [ 10.574438] __asan_report_load1_noabort+0x18/0x20 [ 10.574458] kmalloc_large_uaf+0x2f1/0x340 [ 10.574478] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 10.574500] ? __schedule+0x10c6/0x2b60 [ 10.574523] ? __pfx_read_tsc+0x10/0x10 [ 10.574541] ? ktime_get_ts64+0x86/0x230 [ 10.574567] kunit_try_run_case+0x1a5/0x480 [ 10.574587] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.574604] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 10.574624] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 10.574664] ? __kthread_parkme+0x82/0x180 [ 10.574685] ? preempt_count_sub+0x50/0x80 [ 10.574719] ? __pfx_kunit_try_run_case+0x10/0x10 [ 10.574739] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 10.574761] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 10.574783] kthread+0x337/0x6f0 [ 10.574799] ? trace_preempt_on+0x20/0xc0 [ 10.574821] ? __pfx_kthread+0x10/0x10 [ 10.574838] ? _raw_spin_unlock_irq+0x47/0x80 [ 10.574860] ? calculate_sigpending+0x7b/0xa0 [ 10.574881] ? __pfx_kthread+0x10/0x10 [ 10.574898] ret_from_fork+0x41/0x80 [ 10.574917] ? __pfx_kthread+0x10/0x10 [ 10.574934] ret_from_fork_asm+0x1a/0x30 [ 10.574965] </TASK> [ 10.574976] [ 10.588264] The buggy address belongs to the physical page: [ 10.588463] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103c80 [ 10.588705] flags: 0x200000000000000(node=0|zone=2) [ 10.588880] raw: 0200000000000000 ffffea00040f2108 ffff88815b139a80 0000000000000000 [ 10.589116] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 10.589358] page dumped because: kasan: bad access detected [ 10.589598] [ 10.589665] Memory state around the buggy address: [ 10.589820] ffff888103c7ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.590119] ffff888103c7ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 10.590532] >ffff888103c80000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.591199] ^ [ 10.591573] ffff888103c80080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.592165] ffff888103c80100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.592905] ==================================================================