Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.663899] ================================================================== [ 19.664029] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 19.664139] Write of size 33 at addr fff00000c59a1180 by task kunit_try_catch/187 [ 19.664257] [ 19.664327] CPU: 0 UID: 0 PID: 187 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.664504] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.664569] Hardware name: linux,dummy-virt (DT) [ 19.664652] Call trace: [ 19.664695] show_stack+0x20/0x38 (C) [ 19.664800] dump_stack_lvl+0x8c/0xd0 [ 19.664920] print_report+0x118/0x608 [ 19.665238] kasan_report+0xdc/0x128 [ 19.665564] kasan_check_range+0x100/0x1a8 [ 19.665788] __asan_memset+0x34/0x78 [ 19.665887] kmalloc_uaf_memset+0x170/0x310 [ 19.665973] kunit_try_run_case+0x170/0x3f0 [ 19.666069] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.666331] kthread+0x328/0x630 [ 19.666421] ret_from_fork+0x10/0x20 [ 19.666536] [ 19.666585] Allocated by task 187: [ 19.666656] kasan_save_stack+0x3c/0x68 [ 19.666747] kasan_save_track+0x20/0x40 [ 19.666845] kasan_save_alloc_info+0x40/0x58 [ 19.667292] __kasan_kmalloc+0xd4/0xd8 [ 19.667559] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.667934] kmalloc_uaf_memset+0xb8/0x310 [ 19.668064] kunit_try_run_case+0x170/0x3f0 [ 19.668159] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.668297] kthread+0x328/0x630 [ 19.668372] ret_from_fork+0x10/0x20 [ 19.668450] [ 19.668492] Freed by task 187: [ 19.668552] kasan_save_stack+0x3c/0x68 [ 19.668636] kasan_save_track+0x20/0x40 [ 19.668748] kasan_save_free_info+0x4c/0x78 [ 19.668851] __kasan_slab_free+0x6c/0x98 [ 19.668926] kfree+0x214/0x3c8 [ 19.668993] kmalloc_uaf_memset+0x11c/0x310 [ 19.669166] kunit_try_run_case+0x170/0x3f0 [ 19.669256] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.669701] kthread+0x328/0x630 [ 19.669782] ret_from_fork+0x10/0x20 [ 19.670425] [ 19.670553] The buggy address belongs to the object at fff00000c59a1180 [ 19.670553] which belongs to the cache kmalloc-64 of size 64 [ 19.670742] The buggy address is located 0 bytes inside of [ 19.670742] freed 64-byte region [fff00000c59a1180, fff00000c59a11c0) [ 19.670973] [ 19.671021] The buggy address belongs to the physical page: [ 19.671105] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059a1 [ 19.671235] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.671340] page_type: f5(slab) [ 19.671652] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.671855] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.672329] page dumped because: kasan: bad access detected [ 19.672414] [ 19.672847] Memory state around the buggy address: [ 19.673095] fff00000c59a1080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.673201] fff00000c59a1100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.673281] >fff00000c59a1180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.673362] ^ [ 19.673421] fff00000c59a1200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.674236] fff00000c59a1280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.674408] ==================================================================
[ 12.893063] ================================================================== [ 12.893499] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 12.893862] Write of size 33 at addr ffff888102658d80 by task kunit_try_catch/204 [ 12.894191] [ 12.894301] CPU: 1 UID: 0 PID: 204 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.894343] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.894354] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.894378] Call Trace: [ 12.894389] <TASK> [ 12.894403] dump_stack_lvl+0x73/0xb0 [ 12.894431] print_report+0xd1/0x650 [ 12.894452] ? __virt_addr_valid+0x1db/0x2d0 [ 12.894474] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.894495] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.894517] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.894538] kasan_report+0x141/0x180 [ 12.894560] ? kmalloc_uaf_memset+0x1a3/0x360 [ 12.894585] kasan_check_range+0x10c/0x1c0 [ 12.894608] __asan_memset+0x27/0x50 [ 12.894627] kmalloc_uaf_memset+0x1a3/0x360 [ 12.894648] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 12.894670] ? __schedule+0x10cc/0x2b60 [ 12.894691] ? __pfx_read_tsc+0x10/0x10 [ 12.894711] ? ktime_get_ts64+0x86/0x230 [ 12.894734] kunit_try_run_case+0x1a5/0x480 [ 12.894770] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.894800] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.894823] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.894847] ? __kthread_parkme+0x82/0x180 [ 12.894874] ? preempt_count_sub+0x50/0x80 [ 12.894898] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.894921] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.894947] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.894971] kthread+0x337/0x6f0 [ 12.894990] ? trace_preempt_on+0x20/0xc0 [ 12.895012] ? __pfx_kthread+0x10/0x10 [ 12.895032] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.895053] ? calculate_sigpending+0x7b/0xa0 [ 12.895077] ? __pfx_kthread+0x10/0x10 [ 12.895098] ret_from_fork+0x116/0x1d0 [ 12.895116] ? __pfx_kthread+0x10/0x10 [ 12.895136] ret_from_fork_asm+0x1a/0x30 [ 12.895166] </TASK> [ 12.895176] [ 12.903613] Allocated by task 204: [ 12.904023] kasan_save_stack+0x45/0x70 [ 12.904224] kasan_save_track+0x18/0x40 [ 12.904416] kasan_save_alloc_info+0x3b/0x50 [ 12.904622] __kasan_kmalloc+0xb7/0xc0 [ 12.905115] __kmalloc_cache_noprof+0x189/0x420 [ 12.905297] kmalloc_uaf_memset+0xa9/0x360 [ 12.905672] kunit_try_run_case+0x1a5/0x480 [ 12.906078] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.906315] kthread+0x337/0x6f0 [ 12.906634] ret_from_fork+0x116/0x1d0 [ 12.906821] ret_from_fork_asm+0x1a/0x30 [ 12.907034] [ 12.907104] Freed by task 204: [ 12.907389] kasan_save_stack+0x45/0x70 [ 12.907840] kasan_save_track+0x18/0x40 [ 12.908220] kasan_save_free_info+0x3f/0x60 [ 12.908401] __kasan_slab_free+0x56/0x70 [ 12.908600] kfree+0x222/0x3f0 [ 12.908881] kmalloc_uaf_memset+0x12b/0x360 [ 12.909196] kunit_try_run_case+0x1a5/0x480 [ 12.909557] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.910057] kthread+0x337/0x6f0 [ 12.910416] ret_from_fork+0x116/0x1d0 [ 12.910608] ret_from_fork_asm+0x1a/0x30 [ 12.910871] [ 12.910988] The buggy address belongs to the object at ffff888102658d80 [ 12.910988] which belongs to the cache kmalloc-64 of size 64 [ 12.911857] The buggy address is located 0 bytes inside of [ 12.911857] freed 64-byte region [ffff888102658d80, ffff888102658dc0) [ 12.912534] [ 12.912628] The buggy address belongs to the physical page: [ 12.912874] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102658 [ 12.913333] flags: 0x200000000000000(node=0|zone=2) [ 12.913575] page_type: f5(slab) [ 12.914017] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.914302] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.914866] page dumped because: kasan: bad access detected [ 12.915088] [ 12.915183] Memory state around the buggy address: [ 12.915380] ffff888102658c80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.915693] ffff888102658d00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.916285] >ffff888102658d80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.916653] ^ [ 12.916845] ffff888102658e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.917176] ffff888102658e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.917618] ==================================================================