Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.690415] ================================================================== [ 19.690554] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x3f4/0x468 [ 19.690658] Read of size 1 at addr fff00000c59a1328 by task kunit_try_catch/189 [ 19.690761] [ 19.690844] CPU: 0 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.690998] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.691056] Hardware name: linux,dummy-virt (DT) [ 19.691125] Call trace: [ 19.691169] show_stack+0x20/0x38 (C) [ 19.691272] dump_stack_lvl+0x8c/0xd0 [ 19.691376] print_report+0x118/0x608 [ 19.691474] kasan_report+0xdc/0x128 [ 19.691576] __asan_report_load1_noabort+0x20/0x30 [ 19.691689] kmalloc_uaf2+0x3f4/0x468 [ 19.691784] kunit_try_run_case+0x170/0x3f0 [ 19.691898] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.692005] kthread+0x328/0x630 [ 19.692102] ret_from_fork+0x10/0x20 [ 19.692286] [ 19.692412] Allocated by task 189: [ 19.692622] kasan_save_stack+0x3c/0x68 [ 19.692791] kasan_save_track+0x20/0x40 [ 19.692882] kasan_save_alloc_info+0x40/0x58 [ 19.693209] __kasan_kmalloc+0xd4/0xd8 [ 19.693277] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.693361] kmalloc_uaf2+0xc4/0x468 [ 19.693695] kunit_try_run_case+0x170/0x3f0 [ 19.693790] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.693902] kthread+0x328/0x630 [ 19.693989] ret_from_fork+0x10/0x20 [ 19.694072] [ 19.694118] Freed by task 189: [ 19.694173] kasan_save_stack+0x3c/0x68 [ 19.694256] kasan_save_track+0x20/0x40 [ 19.694358] kasan_save_free_info+0x4c/0x78 [ 19.694487] __kasan_slab_free+0x6c/0x98 [ 19.694581] kfree+0x214/0x3c8 [ 19.694698] kmalloc_uaf2+0x134/0x468 [ 19.694798] kunit_try_run_case+0x170/0x3f0 [ 19.694896] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.695029] kthread+0x328/0x630 [ 19.695136] ret_from_fork+0x10/0x20 [ 19.695214] [ 19.695257] The buggy address belongs to the object at fff00000c59a1300 [ 19.695257] which belongs to the cache kmalloc-64 of size 64 [ 19.695399] The buggy address is located 40 bytes inside of [ 19.695399] freed 64-byte region [fff00000c59a1300, fff00000c59a1340) [ 19.695589] [ 19.695638] The buggy address belongs to the physical page: [ 19.695703] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059a1 [ 19.695832] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.695938] page_type: f5(slab) [ 19.696028] raw: 0bfffe0000000000 fff00000c00018c0 dead000000000122 0000000000000000 [ 19.696175] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 19.696278] page dumped because: kasan: bad access detected [ 19.696376] [ 19.696427] Memory state around the buggy address: [ 19.696494] fff00000c59a1200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.696597] fff00000c59a1280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.696692] >fff00000c59a1300: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 19.696778] ^ [ 19.696866] fff00000c59a1380: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 19.696953] fff00000c59a1400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.697035] ==================================================================
[ 12.920761] ================================================================== [ 12.921511] BUG: KASAN: slab-use-after-free in kmalloc_uaf2+0x4a8/0x520 [ 12.922247] Read of size 1 at addr ffff888102b9bb28 by task kunit_try_catch/206 [ 12.922980] [ 12.923076] CPU: 0 UID: 0 PID: 206 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.923121] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.923132] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.923153] Call Trace: [ 12.923164] <TASK> [ 12.923180] dump_stack_lvl+0x73/0xb0 [ 12.923210] print_report+0xd1/0x650 [ 12.923232] ? __virt_addr_valid+0x1db/0x2d0 [ 12.923255] ? kmalloc_uaf2+0x4a8/0x520 [ 12.923274] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.923297] ? kmalloc_uaf2+0x4a8/0x520 [ 12.923317] kasan_report+0x141/0x180 [ 12.923338] ? kmalloc_uaf2+0x4a8/0x520 [ 12.923362] __asan_report_load1_noabort+0x18/0x20 [ 12.923387] kmalloc_uaf2+0x4a8/0x520 [ 12.923406] ? __pfx_kmalloc_uaf2+0x10/0x10 [ 12.923426] ? finish_task_switch.isra.0+0x153/0x700 [ 12.923449] ? __switch_to+0x47/0xf50 [ 12.923476] ? __schedule+0x10cc/0x2b60 [ 12.923497] ? __pfx_read_tsc+0x10/0x10 [ 12.923517] ? ktime_get_ts64+0x86/0x230 [ 12.923540] kunit_try_run_case+0x1a5/0x480 [ 12.923564] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.923586] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.923609] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.923632] ? __kthread_parkme+0x82/0x180 [ 12.923664] ? preempt_count_sub+0x50/0x80 [ 12.923687] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.923711] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.923734] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.923771] kthread+0x337/0x6f0 [ 12.923805] ? trace_preempt_on+0x20/0xc0 [ 12.923830] ? __pfx_kthread+0x10/0x10 [ 12.923851] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.923872] ? calculate_sigpending+0x7b/0xa0 [ 12.923985] ? __pfx_kthread+0x10/0x10 [ 12.924008] ret_from_fork+0x116/0x1d0 [ 12.924027] ? __pfx_kthread+0x10/0x10 [ 12.924047] ret_from_fork_asm+0x1a/0x30 [ 12.924078] </TASK> [ 12.924089] [ 12.940973] Allocated by task 206: [ 12.941237] kasan_save_stack+0x45/0x70 [ 12.941657] kasan_save_track+0x18/0x40 [ 12.942110] kasan_save_alloc_info+0x3b/0x50 [ 12.942601] __kasan_kmalloc+0xb7/0xc0 [ 12.942854] __kmalloc_cache_noprof+0x189/0x420 [ 12.943401] kmalloc_uaf2+0xc6/0x520 [ 12.943838] kunit_try_run_case+0x1a5/0x480 [ 12.944363] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.944930] kthread+0x337/0x6f0 [ 12.945210] ret_from_fork+0x116/0x1d0 [ 12.945633] ret_from_fork_asm+0x1a/0x30 [ 12.946122] [ 12.946220] Freed by task 206: [ 12.946416] kasan_save_stack+0x45/0x70 [ 12.946890] kasan_save_track+0x18/0x40 [ 12.947300] kasan_save_free_info+0x3f/0x60 [ 12.947818] __kasan_slab_free+0x56/0x70 [ 12.948176] kfree+0x222/0x3f0 [ 12.948409] kmalloc_uaf2+0x14c/0x520 [ 12.948576] kunit_try_run_case+0x1a5/0x480 [ 12.948985] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.949601] kthread+0x337/0x6f0 [ 12.949992] ret_from_fork+0x116/0x1d0 [ 12.950399] ret_from_fork_asm+0x1a/0x30 [ 12.950889] [ 12.951078] The buggy address belongs to the object at ffff888102b9bb00 [ 12.951078] which belongs to the cache kmalloc-64 of size 64 [ 12.952161] The buggy address is located 40 bytes inside of [ 12.952161] freed 64-byte region [ffff888102b9bb00, ffff888102b9bb40) [ 12.953032] [ 12.953274] The buggy address belongs to the physical page: [ 12.953867] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102b9b [ 12.954472] flags: 0x200000000000000(node=0|zone=2) [ 12.954841] page_type: f5(slab) [ 12.955048] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 12.955310] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 12.955596] page dumped because: kasan: bad access detected [ 12.956183] [ 12.956409] Memory state around the buggy address: [ 12.957027] ffff888102b9ba00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.957847] ffff888102b9ba80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.958601] >ffff888102b9bb00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 12.959370] ^ [ 12.959874] ffff888102b9bb80: 00 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc [ 12.960622] ffff888102b9bc00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.963921] ==================================================================