Date
July 10, 2025, 6:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.170279] ================================================================== [ 19.171058] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 19.171151] Read of size 1 at addr fff00000c5a4d450 by task kunit_try_catch/259 [ 19.171222] [ 19.171282] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.171537] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.171767] Hardware name: linux,dummy-virt (DT) [ 19.171866] Call trace: [ 19.171904] show_stack+0x20/0x38 (C) [ 19.172114] dump_stack_lvl+0x8c/0xd0 [ 19.172385] print_report+0x118/0x608 [ 19.172628] kasan_report+0xdc/0x128 [ 19.172718] __asan_report_load1_noabort+0x20/0x30 [ 19.172871] kasan_strings+0x95c/0xb00 [ 19.173274] kunit_try_run_case+0x170/0x3f0 [ 19.173482] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.173649] kthread+0x328/0x630 [ 19.173747] ret_from_fork+0x10/0x20 [ 19.174248] [ 19.174401] Allocated by task 259: [ 19.174477] kasan_save_stack+0x3c/0x68 [ 19.174605] kasan_save_track+0x20/0x40 [ 19.174777] kasan_save_alloc_info+0x40/0x58 [ 19.174950] __kasan_kmalloc+0xd4/0xd8 [ 19.175117] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.175223] kasan_strings+0xc8/0xb00 [ 19.175332] kunit_try_run_case+0x170/0x3f0 [ 19.175657] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.175805] kthread+0x328/0x630 [ 19.175882] ret_from_fork+0x10/0x20 [ 19.175928] [ 19.175978] Freed by task 259: [ 19.176141] kasan_save_stack+0x3c/0x68 [ 19.176370] kasan_save_track+0x20/0x40 [ 19.176465] kasan_save_free_info+0x4c/0x78 [ 19.176527] __kasan_slab_free+0x6c/0x98 [ 19.176686] kfree+0x214/0x3c8 [ 19.176847] kasan_strings+0x24c/0xb00 [ 19.176966] kunit_try_run_case+0x170/0x3f0 [ 19.177036] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.177087] kthread+0x328/0x630 [ 19.177124] ret_from_fork+0x10/0x20 [ 19.177179] [ 19.177213] The buggy address belongs to the object at fff00000c5a4d440 [ 19.177213] which belongs to the cache kmalloc-32 of size 32 [ 19.177286] The buggy address is located 16 bytes inside of [ 19.177286] freed 32-byte region [fff00000c5a4d440, fff00000c5a4d460) [ 19.177372] [ 19.177398] The buggy address belongs to the physical page: [ 19.177447] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a4d [ 19.177511] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.177562] page_type: f5(slab) [ 19.177603] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.177656] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.177700] page dumped because: kasan: bad access detected [ 19.177742] [ 19.177769] Memory state around the buggy address: [ 19.177812] fff00000c5a4d300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.177867] fff00000c5a4d380: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.178236] >fff00000c5a4d400: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.178564] ^ [ 19.178658] fff00000c5a4d480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.179174] fff00000c5a4d500: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.179393] ==================================================================
[ 14.427851] ================================================================== [ 14.428210] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 14.428486] Read of size 1 at addr ffff8881027b2750 by task kunit_try_catch/276 [ 14.428742] [ 14.428873] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.428918] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.428930] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.428951] Call Trace: [ 14.428966] <TASK> [ 14.428980] dump_stack_lvl+0x73/0xb0 [ 14.429009] print_report+0xd1/0x650 [ 14.429043] ? __virt_addr_valid+0x1db/0x2d0 [ 14.429066] ? kasan_strings+0xcbc/0xe80 [ 14.429086] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.429109] ? kasan_strings+0xcbc/0xe80 [ 14.429131] kasan_report+0x141/0x180 [ 14.429152] ? kasan_strings+0xcbc/0xe80 [ 14.429177] __asan_report_load1_noabort+0x18/0x20 [ 14.429202] kasan_strings+0xcbc/0xe80 [ 14.429221] ? trace_hardirqs_on+0x37/0xe0 [ 14.429244] ? __pfx_kasan_strings+0x10/0x10 [ 14.429267] ? __kasan_check_write+0x18/0x20 [ 14.429286] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.429311] ? irqentry_exit+0x2a/0x60 [ 14.429332] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 14.429356] ? trace_hardirqs_on+0x37/0xe0 [ 14.429379] ? __pfx_read_tsc+0x10/0x10 [ 14.429399] ? ktime_get_ts64+0x86/0x230 [ 14.429423] kunit_try_run_case+0x1a5/0x480 [ 14.429447] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.429472] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.429496] ? __kthread_parkme+0x82/0x180 [ 14.429516] ? preempt_count_sub+0x50/0x80 [ 14.429540] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.429564] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.429589] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.429615] kthread+0x337/0x6f0 [ 14.429633] ? trace_preempt_on+0x20/0xc0 [ 14.429655] ? __pfx_kthread+0x10/0x10 [ 14.429675] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.429696] ? calculate_sigpending+0x7b/0xa0 [ 14.429720] ? __pfx_kthread+0x10/0x10 [ 14.429741] ret_from_fork+0x116/0x1d0 [ 14.429758] ? __pfx_kthread+0x10/0x10 [ 14.429779] ret_from_fork_asm+0x1a/0x30 [ 14.429841] </TASK> [ 14.429853] [ 14.438214] Allocated by task 276: [ 14.438399] kasan_save_stack+0x45/0x70 [ 14.438590] kasan_save_track+0x18/0x40 [ 14.438772] kasan_save_alloc_info+0x3b/0x50 [ 14.439354] __kasan_kmalloc+0xb7/0xc0 [ 14.439536] __kmalloc_cache_noprof+0x189/0x420 [ 14.439736] kasan_strings+0xc0/0xe80 [ 14.440533] kunit_try_run_case+0x1a5/0x480 [ 14.440728] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.441383] kthread+0x337/0x6f0 [ 14.441557] ret_from_fork+0x116/0x1d0 [ 14.441733] ret_from_fork_asm+0x1a/0x30 [ 14.441994] [ 14.442101] Freed by task 276: [ 14.442241] kasan_save_stack+0x45/0x70 [ 14.442420] kasan_save_track+0x18/0x40 [ 14.442593] kasan_save_free_info+0x3f/0x60 [ 14.442780] __kasan_slab_free+0x56/0x70 [ 14.443315] kfree+0x222/0x3f0 [ 14.443476] kasan_strings+0x2aa/0xe80 [ 14.443652] kunit_try_run_case+0x1a5/0x480 [ 14.443939] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.444187] kthread+0x337/0x6f0 [ 14.444347] ret_from_fork+0x116/0x1d0 [ 14.444519] ret_from_fork_asm+0x1a/0x30 [ 14.444701] [ 14.444788] The buggy address belongs to the object at ffff8881027b2740 [ 14.444788] which belongs to the cache kmalloc-32 of size 32 [ 14.446013] The buggy address is located 16 bytes inside of [ 14.446013] freed 32-byte region [ffff8881027b2740, ffff8881027b2760) [ 14.446671] [ 14.446769] The buggy address belongs to the physical page: [ 14.447544] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027b2 [ 14.447892] flags: 0x200000000000000(node=0|zone=2) [ 14.448309] page_type: f5(slab) [ 14.448476] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.448777] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.449171] page dumped because: kasan: bad access detected [ 14.449408] [ 14.449497] Memory state around the buggy address: [ 14.449705] ffff8881027b2600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.450533] ffff8881027b2680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.450847] >ffff8881027b2700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.451168] ^ [ 14.451419] ffff8881027b2780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.451714] ffff8881027b2800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.452081] ==================================================================