Date
July 4, 2025, 3:11 p.m.
| Environment | |
|---|---|
| e850-96 | |
| qemu-x86_64 |
[ 27.353328] ================================================================== [ 27.361981] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x170/0x310 [ 27.369094] Write of size 33 at addr ffff000803afaa80 by task kunit_try_catch/235 [ 27.376559] [ 27.378043] CPU: 2 UID: 0 PID: 235 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc2 #1 PREEMPT [ 27.378096] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.378114] Hardware name: WinLink E850-96 board (DT) [ 27.378136] Call trace: [ 27.378151] show_stack+0x20/0x38 (C) [ 27.378185] dump_stack_lvl+0x8c/0xd0 [ 27.378225] print_report+0x118/0x608 [ 27.378257] kasan_report+0xdc/0x128 [ 27.378288] kasan_check_range+0x100/0x1a8 [ 27.378321] __asan_memset+0x34/0x78 [ 27.378353] kmalloc_uaf_memset+0x170/0x310 [ 27.378385] kunit_try_run_case+0x170/0x3f0 [ 27.378421] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.378460] kthread+0x328/0x630 [ 27.378495] ret_from_fork+0x10/0x20 [ 27.378529] [ 27.443744] Allocated by task 235: [ 27.447133] kasan_save_stack+0x3c/0x68 [ 27.450949] kasan_save_track+0x20/0x40 [ 27.454769] kasan_save_alloc_info+0x40/0x58 [ 27.459022] __kasan_kmalloc+0xd4/0xd8 [ 27.462754] __kmalloc_cache_noprof+0x16c/0x3c0 [ 27.467268] kmalloc_uaf_memset+0xb8/0x310 [ 27.471348] kunit_try_run_case+0x170/0x3f0 [ 27.475514] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.480983] kthread+0x328/0x630 [ 27.484195] ret_from_fork+0x10/0x20 [ 27.487754] [ 27.489231] Freed by task 235: [ 27.492268] kasan_save_stack+0x3c/0x68 [ 27.496087] kasan_save_track+0x20/0x40 [ 27.499907] kasan_save_free_info+0x4c/0x78 [ 27.504073] __kasan_slab_free+0x6c/0x98 [ 27.507979] kfree+0x214/0x3c8 [ 27.511017] kmalloc_uaf_memset+0x11c/0x310 [ 27.515184] kunit_try_run_case+0x170/0x3f0 [ 27.519351] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 27.524819] kthread+0x328/0x630 [ 27.528031] ret_from_fork+0x10/0x20 [ 27.531590] [ 27.533067] The buggy address belongs to the object at ffff000803afaa80 [ 27.533067] which belongs to the cache kmalloc-64 of size 64 [ 27.545396] The buggy address is located 0 bytes inside of [ 27.545396] freed 64-byte region [ffff000803afaa80, ffff000803afaac0) [ 27.557371] [ 27.558849] The buggy address belongs to the physical page: [ 27.564407] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x883afa [ 27.572390] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 27.578900] page_type: f5(slab) [ 27.582039] raw: 0bfffe0000000000 ffff0008000028c0 dead000000000122 0000000000000000 [ 27.589756] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 27.597474] page dumped because: kasan: bad access detected [ 27.603030] [ 27.604505] Memory state around the buggy address: [ 27.609287] ffff000803afa980: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.616490] ffff000803afaa00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.623695] >ffff000803afaa80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.630894] ^ [ 27.634110] ffff000803afab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.641314] ffff000803afab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.648517] ==================================================================
[ 14.607484] ================================================================== [ 14.608021] BUG: KASAN: slab-use-after-free in kmalloc_uaf_memset+0x1a3/0x360 [ 14.608468] Write of size 33 at addr ffff8881029f1280 by task kunit_try_catch/207 [ 14.608962] [ 14.609113] CPU: 1 UID: 0 PID: 207 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc2 #1 PREEMPT(voluntary) [ 14.609176] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.609190] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.609214] Call Trace: [ 14.609231] <TASK> [ 14.609257] dump_stack_lvl+0x73/0xb0 [ 14.609294] print_report+0xd1/0x650 [ 14.609320] ? __virt_addr_valid+0x1db/0x2d0 [ 14.609379] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.609430] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.609488] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.609533] kasan_report+0x141/0x180 [ 14.609581] ? kmalloc_uaf_memset+0x1a3/0x360 [ 14.609649] kasan_check_range+0x10c/0x1c0 [ 14.609787] __asan_memset+0x27/0x50 [ 14.609833] kmalloc_uaf_memset+0x1a3/0x360 [ 14.609882] ? __pfx_kmalloc_uaf_memset+0x10/0x10 [ 14.609932] ? __schedule+0x10cc/0x2b60 [ 14.609981] ? __pfx_read_tsc+0x10/0x10 [ 14.610027] ? ktime_get_ts64+0x86/0x230 [ 14.610080] kunit_try_run_case+0x1a5/0x480 [ 14.610124] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.610160] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.610210] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.610259] ? __kthread_parkme+0x82/0x180 [ 14.610302] ? preempt_count_sub+0x50/0x80 [ 14.610331] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.610376] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.610401] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.610424] kthread+0x337/0x6f0 [ 14.610442] ? trace_preempt_on+0x20/0xc0 [ 14.610467] ? __pfx_kthread+0x10/0x10 [ 14.610486] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.610508] ? calculate_sigpending+0x7b/0xa0 [ 14.610530] ? __pfx_kthread+0x10/0x10 [ 14.610549] ret_from_fork+0x41/0x80 [ 14.610570] ? __pfx_kthread+0x10/0x10 [ 14.610589] ret_from_fork_asm+0x1a/0x30 [ 14.610623] </TASK> [ 14.610636] [ 14.624985] Allocated by task 207: [ 14.625886] kasan_save_stack+0x45/0x70 [ 14.626511] kasan_save_track+0x18/0x40 [ 14.626826] kasan_save_alloc_info+0x3b/0x50 [ 14.626948] __kasan_kmalloc+0xb7/0xc0 [ 14.627043] __kmalloc_cache_noprof+0x189/0x420 [ 14.627220] kmalloc_uaf_memset+0xa9/0x360 [ 14.627740] kunit_try_run_case+0x1a5/0x480 [ 14.627991] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.628654] kthread+0x337/0x6f0 [ 14.628897] ret_from_fork+0x41/0x80 [ 14.629140] ret_from_fork_asm+0x1a/0x30 [ 14.629907] [ 14.630148] Freed by task 207: [ 14.630678] kasan_save_stack+0x45/0x70 [ 14.631002] kasan_save_track+0x18/0x40 [ 14.631521] kasan_save_free_info+0x3f/0x60 [ 14.631798] __kasan_slab_free+0x56/0x70 [ 14.632019] kfree+0x222/0x3f0 [ 14.632461] kmalloc_uaf_memset+0x12b/0x360 [ 14.632809] kunit_try_run_case+0x1a5/0x480 [ 14.633145] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.634002] kthread+0x337/0x6f0 [ 14.634280] ret_from_fork+0x41/0x80 [ 14.634492] ret_from_fork_asm+0x1a/0x30 [ 14.634814] [ 14.634995] The buggy address belongs to the object at ffff8881029f1280 [ 14.634995] which belongs to the cache kmalloc-64 of size 64 [ 14.635667] The buggy address is located 0 bytes inside of [ 14.635667] freed 64-byte region [ffff8881029f1280, ffff8881029f12c0) [ 14.636315] [ 14.636809] The buggy address belongs to the physical page: [ 14.637149] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029f1 [ 14.638102] flags: 0x200000000000000(node=0|zone=2) [ 14.638653] page_type: f5(slab) [ 14.638899] raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000 [ 14.639473] raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000 [ 14.639894] page dumped because: kasan: bad access detected [ 14.640139] [ 14.640673] Memory state around the buggy address: [ 14.641145] ffff8881029f1180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.641659] ffff8881029f1200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.641978] >ffff8881029f1280: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 14.642505] ^ [ 14.642676] ffff8881029f1300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.643158] ffff8881029f1380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.644005] ==================================================================