Date
July 16, 2025, 12:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.985287] ================================================================== [ 32.985563] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 32.985735] Read of size 1 at addr fff00000c9bb4890 by task kunit_try_catch/290 [ 32.985828] [ 32.985863] CPU: 0 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT [ 32.986152] Tainted: [B]=BAD_PAGE, [N]=TEST [ 32.986196] Hardware name: linux,dummy-virt (DT) [ 32.986425] Call trace: [ 32.986461] show_stack+0x20/0x38 (C) [ 32.986574] dump_stack_lvl+0x8c/0xd0 [ 32.986628] print_report+0x118/0x5d0 [ 32.986691] kasan_report+0xdc/0x128 [ 32.987049] __asan_report_load1_noabort+0x20/0x30 [ 32.987124] kasan_strings+0x95c/0xb00 [ 32.987308] kunit_try_run_case+0x170/0x3f0 [ 32.987520] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.987636] kthread+0x328/0x630 [ 32.987796] ret_from_fork+0x10/0x20 [ 32.987874] [ 32.988022] Allocated by task 290: [ 32.988054] kasan_save_stack+0x3c/0x68 [ 32.988096] kasan_save_track+0x20/0x40 [ 32.988154] kasan_save_alloc_info+0x40/0x58 [ 32.988316] __kasan_kmalloc+0xd4/0xd8 [ 32.988398] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.988596] kasan_strings+0xc8/0xb00 [ 32.988645] kunit_try_run_case+0x170/0x3f0 [ 32.988698] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.988749] kthread+0x328/0x630 [ 32.988799] ret_from_fork+0x10/0x20 [ 32.988839] [ 32.988869] Freed by task 290: [ 32.988909] kasan_save_stack+0x3c/0x68 [ 32.988948] kasan_save_track+0x20/0x40 [ 32.988992] kasan_save_free_info+0x4c/0x78 [ 32.989032] __kasan_slab_free+0x6c/0x98 [ 32.989071] kfree+0x214/0x3c8 [ 32.989116] kasan_strings+0x24c/0xb00 [ 32.989157] kunit_try_run_case+0x170/0x3f0 [ 32.989201] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.989258] kthread+0x328/0x630 [ 32.989294] ret_from_fork+0x10/0x20 [ 32.989339] [ 32.989361] The buggy address belongs to the object at fff00000c9bb4880 [ 32.989361] which belongs to the cache kmalloc-32 of size 32 [ 32.989432] The buggy address is located 16 bytes inside of [ 32.989432] freed 32-byte region [fff00000c9bb4880, fff00000c9bb48a0) [ 32.989496] [ 32.989565] The buggy address belongs to the physical page: [ 32.989618] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109bb4 [ 32.990040] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.990493] page_type: f5(slab) [ 32.991530] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 32.991621] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 32.991694] page dumped because: kasan: bad access detected [ 32.991755] [ 32.991811] Memory state around the buggy address: [ 32.992065] fff00000c9bb4780: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.992252] fff00000c9bb4800: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 32.992872] >fff00000c9bb4880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.993099] ^ [ 32.993359] fff00000c9bb4900: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.993584] fff00000c9bb4980: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 32.993681] ==================================================================
[ 25.240624] ================================================================== [ 25.240976] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 25.242224] Read of size 1 at addr ffff8881053b8d50 by task kunit_try_catch/308 [ 25.242475] [ 25.242575] CPU: 0 UID: 0 PID: 308 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6-next-20250716 #1 PREEMPT(voluntary) [ 25.242632] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.242646] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.242669] Call Trace: [ 25.242691] <TASK> [ 25.242711] dump_stack_lvl+0x73/0xb0 [ 25.242745] print_report+0xd1/0x610 [ 25.242770] ? __virt_addr_valid+0x1db/0x2d0 [ 25.242795] ? kasan_strings+0xcbc/0xe80 [ 25.242816] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.242842] ? kasan_strings+0xcbc/0xe80 [ 25.242863] kasan_report+0x141/0x180 [ 25.242885] ? kasan_strings+0xcbc/0xe80 [ 25.242909] __asan_report_load1_noabort+0x18/0x20 [ 25.242934] kasan_strings+0xcbc/0xe80 [ 25.242952] ? trace_hardirqs_on+0x37/0xe0 [ 25.242976] ? __pfx_kasan_strings+0x10/0x10 [ 25.242995] ? finish_task_switch.isra.0+0x153/0x700 [ 25.243017] ? __switch_to+0x47/0xf80 [ 25.243042] ? __schedule+0x10c6/0x2b60 [ 25.243065] ? __pfx_read_tsc+0x10/0x10 [ 25.243090] ? ktime_get_ts64+0x86/0x230 [ 25.243115] kunit_try_run_case+0x1a5/0x480 [ 25.243140] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.243161] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.243184] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.243207] ? __kthread_parkme+0x82/0x180 [ 25.243228] ? preempt_count_sub+0x50/0x80 [ 25.243250] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.243272] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.243337] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.243364] kthread+0x337/0x6f0 [ 25.243383] ? trace_preempt_on+0x20/0xc0 [ 25.243405] ? __pfx_kthread+0x10/0x10 [ 25.243424] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.243445] ? calculate_sigpending+0x7b/0xa0 [ 25.243469] ? __pfx_kthread+0x10/0x10 [ 25.243489] ret_from_fork+0x116/0x1d0 [ 25.243508] ? __pfx_kthread+0x10/0x10 [ 25.243529] ret_from_fork_asm+0x1a/0x30 [ 25.243575] </TASK> [ 25.243588] [ 25.259905] Allocated by task 308: [ 25.260282] kasan_save_stack+0x45/0x70 [ 25.260436] kasan_save_track+0x18/0x40 [ 25.260570] kasan_save_alloc_info+0x3b/0x50 [ 25.260713] __kasan_kmalloc+0xb7/0xc0 [ 25.260838] __kmalloc_cache_noprof+0x189/0x420 [ 25.260985] kasan_strings+0xc0/0xe80 [ 25.261109] kunit_try_run_case+0x1a5/0x480 [ 25.261251] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.261986] kthread+0x337/0x6f0 [ 25.262331] ret_from_fork+0x116/0x1d0 [ 25.262698] ret_from_fork_asm+0x1a/0x30 [ 25.263126] [ 25.263315] Freed by task 308: [ 25.263631] kasan_save_stack+0x45/0x70 [ 25.264059] kasan_save_track+0x18/0x40 [ 25.264418] kasan_save_free_info+0x3f/0x60 [ 25.264677] __kasan_slab_free+0x56/0x70 [ 25.264813] kfree+0x222/0x3f0 [ 25.265292] kasan_strings+0x2aa/0xe80 [ 25.265737] kunit_try_run_case+0x1a5/0x480 [ 25.266186] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.266481] kthread+0x337/0x6f0 [ 25.266722] ret_from_fork+0x116/0x1d0 [ 25.267149] ret_from_fork_asm+0x1a/0x30 [ 25.267498] [ 25.267566] The buggy address belongs to the object at ffff8881053b8d40 [ 25.267566] which belongs to the cache kmalloc-32 of size 32 [ 25.268394] The buggy address is located 16 bytes inside of [ 25.268394] freed 32-byte region [ffff8881053b8d40, ffff8881053b8d60) [ 25.268746] [ 25.268894] The buggy address belongs to the physical page: [ 25.269581] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1053b8 [ 25.270370] flags: 0x200000000000000(node=0|zone=2) [ 25.270843] page_type: f5(slab) [ 25.271211] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 25.271953] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 25.272388] page dumped because: kasan: bad access detected [ 25.272556] [ 25.272733] Memory state around the buggy address: [ 25.273382] ffff8881053b8c00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.274088] ffff8881053b8c80: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 25.274319] >ffff8881053b8d00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.274526] ^ [ 25.275122] ffff8881053b8d80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 25.275752] ffff8881053b8e00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.276419] ==================================================================