Date
June 19, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.338866] ================================================================== [ 33.339131] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 33.339337] Read of size 1 at addr fff00000c76d03d0 by task kunit_try_catch/270 [ 33.339519] [ 33.339661] CPU: 0 UID: 0 PID: 270 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT [ 33.339948] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.340018] Hardware name: linux,dummy-virt (DT) [ 33.340145] Call trace: [ 33.340225] show_stack+0x20/0x38 (C) [ 33.340588] dump_stack_lvl+0x8c/0xd0 [ 33.340728] print_report+0x118/0x608 [ 33.340858] kasan_report+0xdc/0x128 [ 33.340999] __asan_report_load1_noabort+0x20/0x30 [ 33.341133] strcmp+0xc0/0xc8 [ 33.341248] kasan_strings+0x340/0xb00 [ 33.341363] kunit_try_run_case+0x170/0x3f0 [ 33.341536] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.341927] kthread+0x328/0x630 [ 33.342108] ret_from_fork+0x10/0x20 [ 33.342282] [ 33.342366] Allocated by task 270: [ 33.342450] kasan_save_stack+0x3c/0x68 [ 33.342606] kasan_save_track+0x20/0x40 [ 33.342706] kasan_save_alloc_info+0x40/0x58 [ 33.342814] __kasan_kmalloc+0xd4/0xd8 [ 33.342924] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.343034] kasan_strings+0xc8/0xb00 [ 33.343108] kunit_try_run_case+0x170/0x3f0 [ 33.343236] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.343385] kthread+0x328/0x630 [ 33.343517] ret_from_fork+0x10/0x20 [ 33.343649] [ 33.343708] Freed by task 270: [ 33.343813] kasan_save_stack+0x3c/0x68 [ 33.343935] kasan_save_track+0x20/0x40 [ 33.344024] kasan_save_free_info+0x4c/0x78 [ 33.344345] __kasan_slab_free+0x6c/0x98 [ 33.344532] kfree+0x214/0x3c8 [ 33.344628] kasan_strings+0x24c/0xb00 [ 33.344936] kunit_try_run_case+0x170/0x3f0 [ 33.345110] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.345242] kthread+0x328/0x630 [ 33.345335] ret_from_fork+0x10/0x20 [ 33.345666] [ 33.345726] The buggy address belongs to the object at fff00000c76d03c0 [ 33.345726] which belongs to the cache kmalloc-32 of size 32 [ 33.345977] The buggy address is located 16 bytes inside of [ 33.345977] freed 32-byte region [fff00000c76d03c0, fff00000c76d03e0) [ 33.346153] [ 33.346207] The buggy address belongs to the physical page: [ 33.346279] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1076d0 [ 33.346407] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.346539] page_type: f5(slab) [ 33.346935] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.347340] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 33.347478] page dumped because: kasan: bad access detected [ 33.347570] [ 33.347689] Memory state around the buggy address: [ 33.347777] fff00000c76d0280: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 33.348169] fff00000c76d0300: 00 00 00 04 fc fc fc fc 00 00 07 fc fc fc fc fc [ 33.348287] >fff00000c76d0380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.348394] ^ [ 33.348610] fff00000c76d0400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 33.348783] fff00000c76d0480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.348917] ==================================================================
[ 29.335599] ================================================================== [ 29.337073] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 29.337589] Read of size 1 at addr ffff8881024dbb10 by task kunit_try_catch/288 [ 29.337945] [ 29.338302] CPU: 1 UID: 0 PID: 288 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) [ 29.338423] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.338452] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.338499] Call Trace: [ 29.338529] <TASK> [ 29.338570] dump_stack_lvl+0x73/0xb0 [ 29.338643] print_report+0xd1/0x650 [ 29.338699] ? __virt_addr_valid+0x1db/0x2d0 [ 29.338752] ? strcmp+0xb0/0xc0 [ 29.338790] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.338836] ? strcmp+0xb0/0xc0 [ 29.338880] kasan_report+0x141/0x180 [ 29.339081] ? strcmp+0xb0/0xc0 [ 29.339162] __asan_report_load1_noabort+0x18/0x20 [ 29.339218] strcmp+0xb0/0xc0 [ 29.339261] kasan_strings+0x431/0xe80 [ 29.339303] ? trace_hardirqs_on+0x37/0xe0 [ 29.339347] ? __pfx_kasan_strings+0x10/0x10 [ 29.339385] ? finish_task_switch.isra.0+0x153/0x700 [ 29.339430] ? __switch_to+0x47/0xf50 [ 29.339485] ? __schedule+0x10cc/0x2b60 [ 29.339519] ? __pfx_read_tsc+0x10/0x10 [ 29.339544] ? ktime_get_ts64+0x86/0x230 [ 29.339571] kunit_try_run_case+0x1a5/0x480 [ 29.339599] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.339623] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 29.339646] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 29.339671] ? __kthread_parkme+0x82/0x180 [ 29.339694] ? preempt_count_sub+0x50/0x80 [ 29.339718] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.339743] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.339766] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 29.339791] kthread+0x337/0x6f0 [ 29.339811] ? trace_preempt_on+0x20/0xc0 [ 29.339835] ? __pfx_kthread+0x10/0x10 [ 29.339857] ? _raw_spin_unlock_irq+0x47/0x80 [ 29.339879] ? calculate_sigpending+0x7b/0xa0 [ 29.339928] ? __pfx_kthread+0x10/0x10 [ 29.340002] ret_from_fork+0x116/0x1d0 [ 29.340052] ? __pfx_kthread+0x10/0x10 [ 29.340123] ret_from_fork_asm+0x1a/0x30 [ 29.340165] </TASK> [ 29.340180] [ 29.351412] Allocated by task 288: [ 29.351759] kasan_save_stack+0x45/0x70 [ 29.352717] kasan_save_track+0x18/0x40 [ 29.353129] kasan_save_alloc_info+0x3b/0x50 [ 29.353477] __kasan_kmalloc+0xb7/0xc0 [ 29.353720] __kmalloc_cache_noprof+0x189/0x420 [ 29.353981] kasan_strings+0xc0/0xe80 [ 29.354449] kunit_try_run_case+0x1a5/0x480 [ 29.354716] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.355237] kthread+0x337/0x6f0 [ 29.355544] ret_from_fork+0x116/0x1d0 [ 29.355765] ret_from_fork_asm+0x1a/0x30 [ 29.356261] [ 29.356397] Freed by task 288: [ 29.356634] kasan_save_stack+0x45/0x70 [ 29.356893] kasan_save_track+0x18/0x40 [ 29.357274] kasan_save_free_info+0x3f/0x60 [ 29.357508] __kasan_slab_free+0x56/0x70 [ 29.357811] kfree+0x222/0x3f0 [ 29.358991] kasan_strings+0x2aa/0xe80 [ 29.359238] kunit_try_run_case+0x1a5/0x480 [ 29.359427] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.359647] kthread+0x337/0x6f0 [ 29.360187] ret_from_fork+0x116/0x1d0 [ 29.360513] ret_from_fork_asm+0x1a/0x30 [ 29.360849] [ 29.361167] The buggy address belongs to the object at ffff8881024dbb00 [ 29.361167] which belongs to the cache kmalloc-32 of size 32 [ 29.362181] The buggy address is located 16 bytes inside of [ 29.362181] freed 32-byte region [ffff8881024dbb00, ffff8881024dbb20) [ 29.363603] [ 29.363749] The buggy address belongs to the physical page: [ 29.364027] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024db [ 29.364602] flags: 0x200000000000000(node=0|zone=2) [ 29.364953] page_type: f5(slab) [ 29.365277] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.365663] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.366319] page dumped because: kasan: bad access detected [ 29.366724] [ 29.366873] Memory state around the buggy address: [ 29.367397] ffff8881024dba00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.368088] ffff8881024dba80: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 29.368419] >ffff8881024dbb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.368763] ^ [ 29.369671] ffff8881024dbb80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.370059] ffff8881024dbc00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.370702] ==================================================================