Date
July 23, 2025, 3:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.830011] ================================================================== [ 32.830062] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 32.830114] Read of size 1 at addr fff00000c9c2cc50 by task kunit_try_catch/292 [ 32.830182] [ 32.830219] CPU: 1 UID: 0 PID: 292 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250723 #1 PREEMPT [ 32.830351] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.830401] Hardware name: linux,dummy-virt (DT) [ 32.830435] Call trace: [ 32.830476] show_stack+0x20/0x38 (C) [ 32.830539] dump_stack_lvl+0x8c/0xd0 [ 32.830586] print_report+0x118/0x5e8 [ 32.830637] kasan_report+0xdc/0x128 [ 32.830680] __asan_report_load1_noabort+0x20/0x30 [ 32.830738] strnlen+0x80/0x88 [ 32.830783] kasan_strings+0x478/0xb00 [ 32.830830] kunit_try_run_case+0x170/0x3f0 [ 32.830877] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.830940] kthread+0x328/0x630 [ 32.830983] ret_from_fork+0x10/0x20 [ 32.831029] [ 32.831254] Allocated by task 292: [ 32.831308] kasan_save_stack+0x3c/0x68 [ 32.831367] kasan_save_track+0x20/0x40 [ 32.831407] kasan_save_alloc_info+0x40/0x58 [ 32.831454] __kasan_kmalloc+0xd4/0xd8 [ 32.831491] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.831534] kasan_strings+0xc8/0xb00 [ 32.831572] kunit_try_run_case+0x170/0x3f0 [ 32.831612] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.831675] kthread+0x328/0x630 [ 32.831743] ret_from_fork+0x10/0x20 [ 32.831783] [ 32.831805] Freed by task 292: [ 32.831840] kasan_save_stack+0x3c/0x68 [ 32.831879] kasan_save_track+0x20/0x40 [ 32.831928] kasan_save_free_info+0x4c/0x78 [ 32.831967] __kasan_slab_free+0x6c/0x98 [ 32.832005] kfree+0x214/0x3c8 [ 32.832041] kasan_strings+0x24c/0xb00 [ 32.832081] kunit_try_run_case+0x170/0x3f0 [ 32.832146] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.832192] kthread+0x328/0x630 [ 32.832228] ret_from_fork+0x10/0x20 [ 32.832426] [ 32.832449] The buggy address belongs to the object at fff00000c9c2cc40 [ 32.832449] which belongs to the cache kmalloc-32 of size 32 [ 32.832519] The buggy address is located 16 bytes inside of [ 32.832519] freed 32-byte region [fff00000c9c2cc40, fff00000c9c2cc60) [ 32.832662] [ 32.832732] The buggy address belongs to the physical page: [ 32.832787] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109c2c [ 32.832844] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.832893] page_type: f5(slab) [ 32.832942] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 32.833012] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 32.833053] page dumped because: kasan: bad access detected [ 32.833085] [ 32.833105] Memory state around the buggy address: [ 32.833158] fff00000c9c2cb00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.833382] fff00000c9c2cb80: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 32.833467] >fff00000c9c2cc00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 32.833582] ^ [ 32.833655] fff00000c9c2cc80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.833700] fff00000c9c2cd00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.833739] ==================================================================
[ 27.297735] ================================================================== [ 27.298183] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 27.298463] Read of size 1 at addr ffff8881060ae110 by task kunit_try_catch/308 [ 27.298777] [ 27.298881] CPU: 1 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) [ 27.298930] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.298942] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.298964] Call Trace: [ 27.298981] <TASK> [ 27.298998] dump_stack_lvl+0x73/0xb0 [ 27.299022] print_report+0xd1/0x640 [ 27.299045] ? __virt_addr_valid+0x1db/0x2d0 [ 27.299069] ? strnlen+0x73/0x80 [ 27.299089] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.299115] ? strnlen+0x73/0x80 [ 27.299134] kasan_report+0x141/0x180 [ 27.299167] ? strnlen+0x73/0x80 [ 27.299191] __asan_report_load1_noabort+0x18/0x20 [ 27.299215] strnlen+0x73/0x80 [ 27.299236] kasan_strings+0x615/0xe80 [ 27.299256] ? trace_hardirqs_on+0x37/0xe0 [ 27.299279] ? __pfx_kasan_strings+0x10/0x10 [ 27.299298] ? finish_task_switch.isra.0+0x153/0x700 [ 27.299320] ? __switch_to+0x47/0xf80 [ 27.299345] ? __schedule+0x10da/0x2b60 [ 27.299369] ? __pfx_read_tsc+0x10/0x10 [ 27.299391] ? ktime_get_ts64+0x86/0x230 [ 27.299414] kunit_try_run_case+0x1a5/0x480 [ 27.299438] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.299461] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.299500] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.299526] ? __kthread_parkme+0x82/0x180 [ 27.299546] ? preempt_count_sub+0x50/0x80 [ 27.299569] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.299593] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.299616] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.299644] kthread+0x337/0x6f0 [ 27.299664] ? trace_preempt_on+0x20/0xc0 [ 27.299687] ? __pfx_kthread+0x10/0x10 [ 27.299707] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.299731] ? calculate_sigpending+0x7b/0xa0 [ 27.299754] ? __pfx_kthread+0x10/0x10 [ 27.299776] ret_from_fork+0x116/0x1d0 [ 27.299795] ? __pfx_kthread+0x10/0x10 [ 27.299816] ret_from_fork_asm+0x1a/0x30 [ 27.299847] </TASK> [ 27.299858] [ 27.307864] Allocated by task 308: [ 27.308158] kasan_save_stack+0x45/0x70 [ 27.308334] kasan_save_track+0x18/0x40 [ 27.308618] kasan_save_alloc_info+0x3b/0x50 [ 27.308793] __kasan_kmalloc+0xb7/0xc0 [ 27.309003] __kmalloc_cache_noprof+0x189/0x420 [ 27.309202] kasan_strings+0xc0/0xe80 [ 27.309418] kunit_try_run_case+0x1a5/0x480 [ 27.309572] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.309816] kthread+0x337/0x6f0 [ 27.309944] ret_from_fork+0x116/0x1d0 [ 27.310189] ret_from_fork_asm+0x1a/0x30 [ 27.310377] [ 27.310480] Freed by task 308: [ 27.310586] kasan_save_stack+0x45/0x70 [ 27.310716] kasan_save_track+0x18/0x40 [ 27.310843] kasan_save_free_info+0x3f/0x60 [ 27.310982] __kasan_slab_free+0x56/0x70 [ 27.311111] kfree+0x222/0x3f0 [ 27.311469] kasan_strings+0x2aa/0xe80 [ 27.311681] kunit_try_run_case+0x1a5/0x480 [ 27.311885] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.312126] kthread+0x337/0x6f0 [ 27.312298] ret_from_fork+0x116/0x1d0 [ 27.312477] ret_from_fork_asm+0x1a/0x30 [ 27.312880] [ 27.313022] The buggy address belongs to the object at ffff8881060ae100 [ 27.313022] which belongs to the cache kmalloc-32 of size 32 [ 27.313567] The buggy address is located 16 bytes inside of [ 27.313567] freed 32-byte region [ffff8881060ae100, ffff8881060ae120) [ 27.314041] [ 27.314137] The buggy address belongs to the physical page: [ 27.314373] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1060ae [ 27.314737] flags: 0x200000000000000(node=0|zone=2) [ 27.314955] page_type: f5(slab) [ 27.315100] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 27.315441] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 27.315726] page dumped because: kasan: bad access detected [ 27.315905] [ 27.316036] Memory state around the buggy address: [ 27.316432] ffff8881060ae000: 00 00 00 04 fc fc fc fc 00 00 07 fc fc fc fc fc [ 27.316723] ffff8881060ae080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.317039] >ffff8881060ae100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.317299] ^ [ 27.317607] ffff8881060ae180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.317897] ffff8881060ae200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.318216] ==================================================================