Date
July 18, 2025, 1:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.846917] ================================================================== [ 33.846973] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 33.847055] Read of size 1 at addr fff00000c907cb50 by task kunit_try_catch/290 [ 33.847675] [ 33.847723] CPU: 0 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT [ 33.847938] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.847999] Hardware name: linux,dummy-virt (DT) [ 33.848127] Call trace: [ 33.848187] show_stack+0x20/0x38 (C) [ 33.848289] dump_stack_lvl+0x8c/0xd0 [ 33.848355] print_report+0x118/0x5e8 [ 33.848545] kasan_report+0xdc/0x128 [ 33.848603] __asan_report_load1_noabort+0x20/0x30 [ 33.848654] kasan_strings+0x95c/0xb00 [ 33.848885] kunit_try_run_case+0x170/0x3f0 [ 33.849045] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.849260] kthread+0x328/0x630 [ 33.849356] ret_from_fork+0x10/0x20 [ 33.849511] [ 33.849599] Allocated by task 290: [ 33.849631] kasan_save_stack+0x3c/0x68 [ 33.850001] kasan_save_track+0x20/0x40 [ 33.850087] kasan_save_alloc_info+0x40/0x58 [ 33.850201] __kasan_kmalloc+0xd4/0xd8 [ 33.850280] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.850358] kasan_strings+0xc8/0xb00 [ 33.850495] kunit_try_run_case+0x170/0x3f0 [ 33.850559] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.850900] kthread+0x328/0x630 [ 33.850967] ret_from_fork+0x10/0x20 [ 33.851042] [ 33.851481] Freed by task 290: [ 33.851847] kasan_save_stack+0x3c/0x68 [ 33.851933] kasan_save_track+0x20/0x40 [ 33.852000] kasan_save_free_info+0x4c/0x78 [ 33.852133] __kasan_slab_free+0x6c/0x98 [ 33.856621] fff00000c907cb80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 33.861180] __asan_report_load1_noabort+0x20/0x30 [ 33.861532] [ 33.861957] ret_from_fork+0x10/0x20 [ 33.863052] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.863960] [ 33.864020] The buggy address belongs to the physical page: [ 33.864189] page_type: f5(slab) [ 33.865019] [ 33.866006] fff00000c907cb80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 33.868453] strnlen+0x80/0x88 [ 33.869842] kasan_save_stack+0x3c/0x68 [ 33.869931] kasan_save_track+0x20/0x40 [ 33.870067] kasan_save_alloc_info+0x40/0x58 [ 33.870518] kasan_strings+0xc8/0xb00 [ 33.871401] kasan_save_track+0x20/0x40 [ 33.872039] kunit_try_run_case+0x170/0x3f0 [ 33.872277] [ 33.872584] The buggy address is located 16 bytes inside of [ 33.872584] freed 32-byte region [fff00000c907cb40, fff00000c907cb60) [ 33.873308] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 33.876984] not ok 62 kasan_strings [ 33.881621] CPU: 0 UID: 0 PID: 292 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT [ 33.881959] dump_stack_lvl+0x8c/0xd0 [ 33.882569] kasan_bitops_generic+0x110/0x1c8 [ 33.883341] kasan_save_stack+0x3c/0x68 [ 33.883835] kunit_try_run_case+0x170/0x3f0 [ 33.884562] ret_from_fork+0x10/0x20 [ 33.884693] The buggy address is located 8 bytes inside of [ 33.884693] allocated 9-byte region [fff00000c907e120, fff00000c907e129) [ 33.886853] fff00000c907e000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 33.887447] ==================================================================
[ 26.794769] ================================================================== [ 26.795180] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 26.795469] Read of size 1 at addr ffff8881053c84d0 by task kunit_try_catch/307 [ 26.795788] [ 26.795954] CPU: 0 UID: 0 PID: 307 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250718 #1 PREEMPT(voluntary) [ 26.796005] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.796018] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.796041] Call Trace: [ 26.796060] <TASK> [ 26.796078] dump_stack_lvl+0x73/0xb0 [ 26.796109] print_report+0xd1/0x640 [ 26.796133] ? __virt_addr_valid+0x1db/0x2d0 [ 26.796156] ? kasan_strings+0xcbc/0xe80 [ 26.796178] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.796204] ? kasan_strings+0xcbc/0xe80 [ 26.796224] kasan_report+0x141/0x180 [ 26.796246] ? kasan_strings+0xcbc/0xe80 [ 26.796281] __asan_report_load1_noabort+0x18/0x20 [ 26.796306] kasan_strings+0xcbc/0xe80 [ 26.796325] ? trace_hardirqs_on+0x37/0xe0 [ 26.796349] ? __pfx_kasan_strings+0x10/0x10 [ 26.796369] ? finish_task_switch.isra.0+0x153/0x700 [ 26.796392] ? __switch_to+0x47/0xf80 [ 26.796419] ? __schedule+0x10da/0x2b60 [ 26.796443] ? __pfx_read_tsc+0x10/0x10 [ 26.796464] ? ktime_get_ts64+0x86/0x230 [ 26.796488] kunit_try_run_case+0x1a5/0x480 [ 26.796513] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.796535] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 26.796568] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.796601] ? __kthread_parkme+0x82/0x180 [ 26.796620] ? preempt_count_sub+0x50/0x80 [ 26.796644] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.796667] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.796689] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.796712] kthread+0x337/0x6f0 [ 26.796731] ? trace_preempt_on+0x20/0xc0 [ 26.796752] ? __pfx_kthread+0x10/0x10 [ 26.796772] ? _raw_spin_unlock_irq+0x47/0x80 [ 26.796852] ? calculate_sigpending+0x7b/0xa0 [ 26.796879] ? __pfx_kthread+0x10/0x10 [ 26.796900] ret_from_fork+0x116/0x1d0 [ 26.796920] ? __pfx_kthread+0x10/0x10 [ 26.796939] ret_from_fork_asm+0x1a/0x30 [ 26.796970] </TASK> [ 26.796980] [ 26.804313] Allocated by task 307: [ 26.804467] kasan_save_stack+0x45/0x70 [ 26.804658] kasan_save_track+0x18/0x40 [ 26.804829] kasan_save_alloc_info+0x3b/0x50 [ 26.805021] __kasan_kmalloc+0xb7/0xc0 [ 26.805174] __kmalloc_cache_noprof+0x189/0x420 [ 26.805390] kasan_strings+0xc0/0xe80 [ 26.805570] kunit_try_run_case+0x1a5/0x480 [ 26.805715] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.805884] kthread+0x337/0x6f0 [ 26.805999] ret_from_fork+0x116/0x1d0 [ 26.806126] ret_from_fork_asm+0x1a/0x30 [ 26.806265] [ 26.806338] Freed by task 307: [ 26.806442] kasan_save_stack+0x45/0x70 [ 26.806573] kasan_save_track+0x18/0x40 [ 26.806706] kasan_save_free_info+0x3f/0x60 [ 26.806844] __kasan_slab_free+0x56/0x70 [ 26.806975] kfree+0x222/0x3f0 [ 26.807083] kasan_strings+0x2aa/0xe80 [ 26.807208] kunit_try_run_case+0x1a5/0x480 [ 26.807460] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.807727] kthread+0x337/0x6f0 [ 26.808013] ret_from_fork+0x116/0x1d0 [ 26.808687] ret_from_fork_asm+0x1a/0x30 [ 26.809036] [ 26.809187] The buggy address belongs to the object at ffff8881053c84c0 [ 26.809187] which belongs to the cache kmalloc-32 of size 32 [ 26.809737] The buggy address is located 16 bytes inside of [ 26.809737] freed 32-byte region [ffff8881053c84c0, ffff8881053c84e0) [ 26.811280] [ 26.811389] The buggy address belongs to the physical page: [ 26.811636] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1053c8 [ 26.813033] flags: 0x200000000000000(node=0|zone=2) [ 26.814491] page_type: f5(slab) [ 26.814744] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 26.815526] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 26.816023] page dumped because: kasan: bad access detected [ 26.816355] [ 26.816420] Memory state around the buggy address: [ 26.816620] ffff8881053c8380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 26.817023] ffff8881053c8400: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 26.817449] >ffff8881053c8480: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 26.817829] ^ [ 26.818058] ffff8881053c8500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 26.818406] ffff8881053c8580: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 26.818728] ==================================================================