Date
July 15, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.227655] ================================================================== [ 15.227898] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2cc/0x2f8 [ 15.227950] Read of size 1 at addr fff00000c7834000 by task kunit_try_catch/149 [ 15.228192] [ 15.228346] CPU: 1 UID: 0 PID: 149 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.228427] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.228463] Hardware name: linux,dummy-virt (DT) [ 15.228605] Call trace: [ 15.228730] show_stack+0x20/0x38 (C) [ 15.228779] dump_stack_lvl+0x8c/0xd0 [ 15.228823] print_report+0x118/0x5d0 [ 15.228867] kasan_report+0xdc/0x128 [ 15.228911] __asan_report_load1_noabort+0x20/0x30 [ 15.228960] kmalloc_large_uaf+0x2cc/0x2f8 [ 15.229003] kunit_try_run_case+0x170/0x3f0 [ 15.229049] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.229099] kthread+0x328/0x630 [ 15.229139] ret_from_fork+0x10/0x20 [ 15.229454] [ 15.229522] The buggy address belongs to the physical page: [ 15.229566] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107834 [ 15.229712] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.229785] raw: 0bfffe0000000000 ffffc1ffc31e0e08 fff00000da478c40 0000000000000000 [ 15.229835] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 15.229874] page dumped because: kasan: bad access detected [ 15.229904] [ 15.229945] Memory state around the buggy address: [ 15.229975] fff00000c7833f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.230018] fff00000c7833f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.230058] >fff00000c7834000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 15.230257] ^ [ 15.230497] fff00000c7834080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 15.230541] fff00000c7834100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 15.230578] ==================================================================
[ 12.078520] ================================================================== [ 12.078987] BUG: KASAN: use-after-free in kmalloc_large_uaf+0x2f1/0x340 [ 12.079277] Read of size 1 at addr ffff8881026b8000 by task kunit_try_catch/165 [ 12.079746] [ 12.079863] CPU: 1 UID: 0 PID: 165 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.079906] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.079917] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.079937] Call Trace: [ 12.079948] <TASK> [ 12.079962] dump_stack_lvl+0x73/0xb0 [ 12.079992] print_report+0xd1/0x610 [ 12.080014] ? __virt_addr_valid+0x1db/0x2d0 [ 12.080037] ? kmalloc_large_uaf+0x2f1/0x340 [ 12.080058] ? kasan_addr_to_slab+0x11/0xa0 [ 12.080078] ? kmalloc_large_uaf+0x2f1/0x340 [ 12.080100] kasan_report+0x141/0x180 [ 12.080122] ? kmalloc_large_uaf+0x2f1/0x340 [ 12.080147] __asan_report_load1_noabort+0x18/0x20 [ 12.080172] kmalloc_large_uaf+0x2f1/0x340 [ 12.080193] ? __pfx_kmalloc_large_uaf+0x10/0x10 [ 12.080215] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 12.080242] ? trace_hardirqs_on+0x37/0xe0 [ 12.080265] ? __pfx_read_tsc+0x10/0x10 [ 12.080285] ? ktime_get_ts64+0x86/0x230 [ 12.080310] kunit_try_run_case+0x1a5/0x480 [ 12.080528] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.080557] ? queued_spin_lock_slowpath+0x116/0xb40 [ 12.080581] ? __kthread_parkme+0x82/0x180 [ 12.080601] ? preempt_count_sub+0x50/0x80 [ 12.080624] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.080649] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.080683] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.080708] kthread+0x337/0x6f0 [ 12.080727] ? trace_preempt_on+0x20/0xc0 [ 12.080749] ? __pfx_kthread+0x10/0x10 [ 12.080787] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.080808] ? calculate_sigpending+0x7b/0xa0 [ 12.080832] ? __pfx_kthread+0x10/0x10 [ 12.080854] ret_from_fork+0x116/0x1d0 [ 12.080872] ? __pfx_kthread+0x10/0x10 [ 12.080893] ret_from_fork_asm+0x1a/0x30 [ 12.080923] </TASK> [ 12.080933] [ 12.088510] The buggy address belongs to the physical page: [ 12.088972] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1026b8 [ 12.089323] flags: 0x200000000000000(node=0|zone=2) [ 12.089642] raw: 0200000000000000 ffffea000409af08 ffff88815b139f80 0000000000000000 [ 12.089958] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 12.090291] page dumped because: kasan: bad access detected [ 12.090514] [ 12.090629] Memory state around the buggy address: [ 12.090830] ffff8881026b7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.091052] ffff8881026b7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.091377] >ffff8881026b8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 12.091974] ^ [ 12.092125] ffff8881026b8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 12.092365] ffff8881026b8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 12.092577] ==================================================================