Date
June 19, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.371428] ================================================================== [ 33.371566] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 33.371693] Read of size 1 at addr fff00000c76d03d0 by task kunit_try_catch/270 [ 33.371823] [ 33.371961] CPU: 0 UID: 0 PID: 270 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT [ 33.372162] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.372230] Hardware name: linux,dummy-virt (DT) [ 33.372316] Call trace: [ 33.372414] show_stack+0x20/0x38 (C) [ 33.372596] dump_stack_lvl+0x8c/0xd0 [ 33.372768] print_report+0x118/0x608 [ 33.372923] kasan_report+0xdc/0x128 [ 33.373046] __asan_report_load1_noabort+0x20/0x30 [ 33.373172] strnlen+0x80/0x88 [ 33.373277] kasan_strings+0x478/0xb00 [ 33.373396] kunit_try_run_case+0x170/0x3f0 [ 33.373585] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.373906] kthread+0x328/0x630 [ 33.374025] ret_from_fork+0x10/0x20 [ 33.374151] [ 33.374194] Allocated by task 270: [ 33.374258] kasan_save_stack+0x3c/0x68 [ 33.374383] kasan_save_track+0x20/0x40 [ 33.374454] kasan_save_alloc_info+0x40/0x58 [ 33.374538] __kasan_kmalloc+0xd4/0xd8 [ 33.374629] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.374774] kasan_strings+0xc8/0xb00 [ 33.374932] kunit_try_run_case+0x170/0x3f0 [ 33.375095] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.375772] kthread+0x328/0x630 [ 33.376131] Freed by task 270: [ 33.376528] __kasan_slab_free+0x6c/0x98 [ 33.377163] ret_from_fork+0x10/0x20 [ 33.377560] The buggy address is located 16 bytes inside of [ 33.377560] freed 32-byte region [fff00000c76d03c0, fff00000c76d03e0) [ 33.378028] page_type: f5(slab) [ 33.378077] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.378223] [ 33.378385] >fff00000c76d0380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.387372] not ok 62 kasan_strings [ 33.395957] Write of size 8 at addr fff00000c6135568 by task kunit_try_catch/272 [ 33.397932] print_report+0x118/0x608 [ 33.399071] kthread+0x328/0x630 [ 33.399742] [ 33.399796] Allocated by task 272: [ 33.399881] kasan_save_stack+0x3c/0x68 [ 33.399998] kasan_save_track+0x20/0x40 [ 33.400109] kasan_save_alloc_info+0x40/0x58 [ 33.400349] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.401499] The buggy address belongs to the object at fff00000c6135560 [ 33.401499] which belongs to the cache kmalloc-16 of size 16 [ 33.402456] The buggy address belongs to the physical page: [ 33.404255] raw: fff00000c6135540 000000008080007f 00000000f5000000 0000000000000000 [ 33.405273] ==================================================================
[ 29.436926] ================================================================== [ 29.439646] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 29.440165] Read of size 1 at addr ffff8881024dbb10 by task kunit_try_catch/288 [ 29.440491] [ 29.440638] CPU: 1 UID: 0 PID: 288 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) [ 29.440745] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.440772] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.440817] Call Trace: [ 29.440861] <TASK> [ 29.440904] dump_stack_lvl+0x73/0xb0 [ 29.440964] print_report+0xd1/0x650 [ 29.442038] ? __virt_addr_valid+0x1db/0x2d0 [ 29.442123] ? strnlen+0x73/0x80 [ 29.442169] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.442228] ? strnlen+0x73/0x80 [ 29.442272] kasan_report+0x141/0x180 [ 29.442324] ? strnlen+0x73/0x80 [ 29.442378] __asan_report_load1_noabort+0x18/0x20 [ 29.442432] strnlen+0x73/0x80 [ 29.442477] kasan_strings+0x615/0xe80 [ 29.442524] ? trace_hardirqs_on+0x37/0xe0 [ 29.442577] ? __pfx_kasan_strings+0x10/0x10 [ 29.442621] ? finish_task_switch.isra.0+0x153/0x700 [ 29.442668] ? __switch_to+0x47/0xf50 [ 29.442724] ? __schedule+0x10cc/0x2b60 [ 29.442777] ? __pfx_read_tsc+0x10/0x10 [ 29.442823] ? ktime_get_ts64+0x86/0x230 [ 29.442878] kunit_try_run_case+0x1a5/0x480 [ 29.442935] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.442983] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 29.443032] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 29.443086] ? __kthread_parkme+0x82/0x180 [ 29.443145] ? preempt_count_sub+0x50/0x80 [ 29.443248] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.443407] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.443462] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 29.443517] kthread+0x337/0x6f0 [ 29.443565] ? trace_preempt_on+0x20/0xc0 [ 29.443617] ? __pfx_kthread+0x10/0x10 [ 29.443661] ? _raw_spin_unlock_irq+0x47/0x80 [ 29.443690] ? calculate_sigpending+0x7b/0xa0 [ 29.443717] ? __pfx_kthread+0x10/0x10 [ 29.443739] ret_from_fork+0x116/0x1d0 [ 29.443761] ? __pfx_kthread+0x10/0x10 [ 29.443783] ret_from_fork_asm+0x1a/0x30 [ 29.443816] </TASK> [ 29.443830] [ 29.456638] Allocated by task 288: [ 29.457209] kasan_save_stack+0x45/0x70 [ 29.457629] kasan_save_track+0x18/0x40 [ 29.457896] kasan_save_alloc_info+0x3b/0x50 [ 29.458668] __kasan_kmalloc+0xb7/0xc0 [ 29.458903] __kmalloc_cache_noprof+0x189/0x420 [ 29.459191] kasan_strings+0xc0/0xe80 [ 29.459383] kunit_try_run_case+0x1a5/0x480 [ 29.459591] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.459827] kthread+0x337/0x6f0 [ 29.461302] ret_from_fork+0x116/0x1d0 [ 29.461532] ret_from_fork_asm+0x1a/0x30 [ 29.461720] [ 29.461826] Freed by task 288: [ 29.462679] kasan_save_stack+0x45/0x70 [ 29.463167] kasan_save_track+0x18/0x40 [ 29.463472] kasan_save_free_info+0x3f/0x60 [ 29.463710] __kasan_slab_free+0x56/0x70 [ 29.464053] kfree+0x222/0x3f0 [ 29.464284] kasan_strings+0x2aa/0xe80 [ 29.464453] kunit_try_run_case+0x1a5/0x480 [ 29.464710] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.465129] kthread+0x337/0x6f0 [ 29.465294] ret_from_fork+0x116/0x1d0 [ 29.465464] ret_from_fork_asm+0x1a/0x30 [ 29.465859] [ 29.466024] The buggy address belongs to the object at ffff8881024dbb00 [ 29.466024] which belongs to the cache kmalloc-32 of size 32 [ 29.466823] The buggy address is located 16 bytes inside of [ 29.466823] freed 32-byte region [ffff8881024dbb00, ffff8881024dbb20) [ 29.468469] [ 29.468665] The buggy address belongs to the physical page: [ 29.469063] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024db [ 29.469547] flags: 0x200000000000000(node=0|zone=2) [ 29.469770] page_type: f5(slab) [ 29.469942] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.470835] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.471203] page dumped because: kasan: bad access detected [ 29.471511] [ 29.471693] Memory state around the buggy address: [ 29.472162] ffff8881024dba00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.472415] ffff8881024dba80: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 29.472987] >ffff8881024dbb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.473486] ^ [ 29.473808] ffff8881024dbb80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.475201] ffff8881024dbc00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.475616] ==================================================================