Date
June 5, 2025, 7:08 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 28.846851] ================================================================== [ 28.847680] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 28.848204] Read of size 1 at addr fff00000c770c050 by task kunit_try_catch/259 [ 28.848365] [ 28.848439] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250605 #1 PREEMPT [ 28.849179] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.849318] Hardware name: linux,dummy-virt (DT) [ 28.849430] Call trace: [ 28.849587] show_stack+0x20/0x38 (C) [ 28.849939] dump_stack_lvl+0x8c/0xd0 [ 28.850076] print_report+0x118/0x608 [ 28.850364] kasan_report+0xdc/0x128 [ 28.850501] __asan_report_load1_noabort+0x20/0x30 [ 28.850647] strnlen+0x80/0x88 [ 28.850775] kasan_strings+0x478/0xb00 [ 28.850916] kunit_try_run_case+0x170/0x3f0 [ 28.851764] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.852088] kthread+0x328/0x630 [ 28.852175] ret_from_fork+0x10/0x20 [ 28.852270] [ 28.852297] Allocated by task 259: [ 28.852363] kasan_save_stack+0x3c/0x68 [ 28.852473] kasan_save_track+0x20/0x40 [ 28.852822] kasan_save_alloc_info+0x40/0x58 [ 28.853139] __kasan_kmalloc+0xd4/0xd8 [ 28.853247] __kmalloc_cache_noprof+0x16c/0x3c0 [ 28.853407] kasan_strings+0xc8/0xb00 [ 28.853685] kunit_try_run_case+0x170/0x3f0 [ 28.853812] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.853973] kthread+0x328/0x630 [ 28.854208] ret_from_fork+0x10/0x20 [ 28.854706] [ 28.854772] Freed by task 259: [ 28.854855] kasan_save_stack+0x3c/0x68 [ 28.855520] kasan_save_track+0x20/0x40 [ 28.855825] kasan_save_free_info+0x4c/0x78 [ 28.855958] __kasan_slab_free+0x6c/0x98 [ 28.856284] kfree+0x214/0x3c8 [ 28.856414] kasan_strings+0x24c/0xb00 [ 28.856526] kunit_try_run_case+0x170/0x3f0 [ 28.856643] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.856775] kthread+0x328/0x630 [ 28.857562] ret_from_fork+0x10/0x20 [ 28.857766] [ 28.857842] The buggy address belongs to the object at fff00000c770c040 [ 28.857842] which belongs to the cache kmalloc-32 of size 32 [ 28.858133] The buggy address is located 16 bytes inside of [ 28.858133] freed 32-byte region [fff00000c770c040, fff00000c770c060) [ 28.858302] [ 28.858662] The buggy address belongs to the physical page: [ 28.858755] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10770c [ 28.858892] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.859053] page_type: f5(slab) [ 28.859256] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 28.859492] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 28.859609] page dumped because: kasan: bad access detected [ 28.859818] [ 28.859882] Memory state around the buggy address: [ 28.860010] fff00000c770bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.860341] fff00000c770bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.860475] >fff00000c770c000: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 28.860837] ^ [ 28.860945] fff00000c770c080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.861297] fff00000c770c100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 28.861488] ==================================================================
[ 13.393217] ================================================================== [ 13.393516] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.393829] Read of size 1 at addr ffff88810278df50 by task kunit_try_catch/276 [ 13.394175] [ 13.394261] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250605 #1 PREEMPT(voluntary) [ 13.394304] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.394315] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.394336] Call Trace: [ 13.394348] <TASK> [ 13.394360] dump_stack_lvl+0x73/0xb0 [ 13.394383] print_report+0xd1/0x650 [ 13.394403] ? __virt_addr_valid+0x1db/0x2d0 [ 13.394427] ? strnlen+0x73/0x80 [ 13.394444] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.394466] ? strnlen+0x73/0x80 [ 13.394485] kasan_report+0x141/0x180 [ 13.394506] ? strnlen+0x73/0x80 [ 13.394529] __asan_report_load1_noabort+0x18/0x20 [ 13.394553] strnlen+0x73/0x80 [ 13.394573] kasan_strings+0x615/0xe80 [ 13.394593] ? trace_hardirqs_on+0x37/0xe0 [ 13.394614] ? __pfx_kasan_strings+0x10/0x10 [ 13.394634] ? finish_task_switch.isra.0+0x153/0x700 [ 13.394656] ? __switch_to+0x47/0xf50 [ 13.394680] ? __schedule+0x10cc/0x2b60 [ 13.394703] ? __pfx_read_tsc+0x10/0x10 [ 13.394723] ? ktime_get_ts64+0x86/0x230 [ 13.394746] kunit_try_run_case+0x1a5/0x480 [ 13.394766] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.394785] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.394809] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.394833] ? __kthread_parkme+0x82/0x180 [ 13.394852] ? preempt_count_sub+0x50/0x80 [ 13.394874] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.394907] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.394931] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.394956] kthread+0x337/0x6f0 [ 13.394975] ? trace_preempt_on+0x20/0xc0 [ 13.394996] ? __pfx_kthread+0x10/0x10 [ 13.395015] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.395090] ? calculate_sigpending+0x7b/0xa0 [ 13.395115] ? __pfx_kthread+0x10/0x10 [ 13.395136] ret_from_fork+0x116/0x1d0 [ 13.395155] ? __pfx_kthread+0x10/0x10 [ 13.395175] ret_from_fork_asm+0x1a/0x30 [ 13.395203] </TASK> [ 13.395213] [ 13.403197] Allocated by task 276: [ 13.403375] kasan_save_stack+0x45/0x70 [ 13.403613] kasan_save_track+0x18/0x40 [ 13.403811] kasan_save_alloc_info+0x3b/0x50 [ 13.404035] __kasan_kmalloc+0xb7/0xc0 [ 13.404220] __kmalloc_cache_noprof+0x189/0x420 [ 13.404513] kasan_strings+0xc0/0xe80 [ 13.404644] kunit_try_run_case+0x1a5/0x480 [ 13.404785] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.404970] kthread+0x337/0x6f0 [ 13.405097] ret_from_fork+0x116/0x1d0 [ 13.405447] ret_from_fork_asm+0x1a/0x30 [ 13.405669] [ 13.405768] Freed by task 276: [ 13.405938] kasan_save_stack+0x45/0x70 [ 13.406277] kasan_save_track+0x18/0x40 [ 13.406477] kasan_save_free_info+0x3f/0x60 [ 13.406687] __kasan_slab_free+0x56/0x70 [ 13.406888] kfree+0x222/0x3f0 [ 13.407095] kasan_strings+0x2aa/0xe80 [ 13.407228] kunit_try_run_case+0x1a5/0x480 [ 13.407368] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.407541] kthread+0x337/0x6f0 [ 13.407658] ret_from_fork+0x116/0x1d0 [ 13.408126] ret_from_fork_asm+0x1a/0x30 [ 13.408327] [ 13.408420] The buggy address belongs to the object at ffff88810278df40 [ 13.408420] which belongs to the cache kmalloc-32 of size 32 [ 13.409208] The buggy address is located 16 bytes inside of [ 13.409208] freed 32-byte region [ffff88810278df40, ffff88810278df60) [ 13.409864] [ 13.409962] The buggy address belongs to the physical page: [ 13.410234] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10278d [ 13.410521] flags: 0x200000000000000(node=0|zone=2) [ 13.410683] page_type: f5(slab) [ 13.410801] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.411043] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 13.411591] page dumped because: kasan: bad access detected [ 13.412056] [ 13.412153] Memory state around the buggy address: [ 13.412376] ffff88810278de00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.412678] ffff88810278de80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.412903] >ffff88810278df00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.413392] ^ [ 13.413752] ffff88810278df80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.414810] ffff88810278e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.415058] ==================================================================