Date
July 16, 2025, 3:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.844216] ================================================================== [ 18.844542] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 18.844606] Read of size 1 at addr fff00000c595c710 by task kunit_try_catch/259 [ 18.844787] [ 18.844832] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 18.844926] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.845152] Hardware name: linux,dummy-virt (DT) [ 18.845387] Call trace: [ 18.845528] show_stack+0x20/0x38 (C) [ 18.845594] dump_stack_lvl+0x8c/0xd0 [ 18.846050] print_report+0x118/0x5d0 [ 18.846131] kasan_report+0xdc/0x128 [ 18.846182] __asan_report_load1_noabort+0x20/0x30 [ 18.846235] strnlen+0x80/0x88 [ 18.846695] kasan_strings+0x478/0xb00 [ 18.846786] kunit_try_run_case+0x170/0x3f0 [ 18.846843] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.846952] kthread+0x328/0x630 [ 18.847096] ret_from_fork+0x10/0x20 [ 18.847158] [ 18.847178] Allocated by task 259: [ 18.847243] kasan_save_stack+0x3c/0x68 [ 18.847355] kasan_save_track+0x20/0x40 [ 18.847676] kasan_save_alloc_info+0x40/0x58 [ 18.847939] __kasan_kmalloc+0xd4/0xd8 [ 18.848033] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.848176] kasan_strings+0xc8/0xb00 [ 18.848537] kunit_try_run_case+0x170/0x3f0 [ 18.848658] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.848822] kthread+0x328/0x630 [ 18.848933] ret_from_fork+0x10/0x20 [ 18.849014] [ 18.849164] Freed by task 259: [ 18.849229] kasan_save_stack+0x3c/0x68 [ 18.849279] kasan_save_track+0x20/0x40 [ 18.849468] kasan_save_free_info+0x4c/0x78 [ 18.849678] __kasan_slab_free+0x6c/0x98 [ 18.849850] kfree+0x214/0x3c8 [ 18.849952] kasan_strings+0x24c/0xb00 [ 18.850065] kunit_try_run_case+0x170/0x3f0 [ 18.850414] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.850507] kthread+0x328/0x630 [ 18.850623] ret_from_fork+0x10/0x20 [ 18.850763] [ 18.850834] The buggy address belongs to the object at fff00000c595c700 [ 18.850834] which belongs to the cache kmalloc-32 of size 32 [ 18.850937] The buggy address is located 16 bytes inside of [ 18.850937] freed 32-byte region [fff00000c595c700, fff00000c595c720) [ 18.851094] [ 18.851137] The buggy address belongs to the physical page: [ 18.851427] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10595c [ 18.851689] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.851790] page_type: f5(slab) [ 18.851952] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.852034] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.852212] page dumped because: kasan: bad access detected [ 18.852255] [ 18.852419] Memory state around the buggy address: [ 18.852600] fff00000c595c600: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.852782] fff00000c595c680: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 18.852910] >fff00000c595c700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.853235] ^ [ 18.853321] fff00000c595c780: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.853400] fff00000c595c800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.853605] ==================================================================
[ 14.598292] ================================================================== [ 14.598958] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 14.599280] Read of size 1 at addr ffff888103a5c550 by task kunit_try_catch/276 [ 14.599685] [ 14.599783] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.599826] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.599837] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.599859] Call Trace: [ 14.599874] <TASK> [ 14.599888] dump_stack_lvl+0x73/0xb0 [ 14.599916] print_report+0xd1/0x610 [ 14.599938] ? __virt_addr_valid+0x1db/0x2d0 [ 14.599962] ? strnlen+0x73/0x80 [ 14.600035] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.600061] ? strnlen+0x73/0x80 [ 14.600081] kasan_report+0x141/0x180 [ 14.600105] ? strnlen+0x73/0x80 [ 14.600128] __asan_report_load1_noabort+0x18/0x20 [ 14.600155] strnlen+0x73/0x80 [ 14.600174] kasan_strings+0x615/0xe80 [ 14.600195] ? trace_hardirqs_on+0x37/0xe0 [ 14.600220] ? __pfx_kasan_strings+0x10/0x10 [ 14.600242] ? finish_task_switch.isra.0+0x153/0x700 [ 14.600267] ? __switch_to+0x47/0xf50 [ 14.600293] ? __schedule+0x10cc/0x2b60 [ 14.600316] ? __pfx_read_tsc+0x10/0x10 [ 14.600337] ? ktime_get_ts64+0x86/0x230 [ 14.600362] kunit_try_run_case+0x1a5/0x480 [ 14.600387] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.600412] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.600451] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.600476] ? __kthread_parkme+0x82/0x180 [ 14.600497] ? preempt_count_sub+0x50/0x80 [ 14.600521] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.600548] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.600573] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.600599] kthread+0x337/0x6f0 [ 14.600619] ? trace_preempt_on+0x20/0xc0 [ 14.600641] ? __pfx_kthread+0x10/0x10 [ 14.600662] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.600686] ? calculate_sigpending+0x7b/0xa0 [ 14.600711] ? __pfx_kthread+0x10/0x10 [ 14.600732] ret_from_fork+0x116/0x1d0 [ 14.600752] ? __pfx_kthread+0x10/0x10 [ 14.600787] ret_from_fork_asm+0x1a/0x30 [ 14.600818] </TASK> [ 14.600828] [ 14.608624] Allocated by task 276: [ 14.608811] kasan_save_stack+0x45/0x70 [ 14.609153] kasan_save_track+0x18/0x40 [ 14.609351] kasan_save_alloc_info+0x3b/0x50 [ 14.609621] __kasan_kmalloc+0xb7/0xc0 [ 14.609813] __kmalloc_cache_noprof+0x189/0x420 [ 14.610034] kasan_strings+0xc0/0xe80 [ 14.610229] kunit_try_run_case+0x1a5/0x480 [ 14.610426] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.610618] kthread+0x337/0x6f0 [ 14.610741] ret_from_fork+0x116/0x1d0 [ 14.610945] ret_from_fork_asm+0x1a/0x30 [ 14.611198] [ 14.611300] Freed by task 276: [ 14.611467] kasan_save_stack+0x45/0x70 [ 14.611646] kasan_save_track+0x18/0x40 [ 14.611830] kasan_save_free_info+0x3f/0x60 [ 14.612054] __kasan_slab_free+0x56/0x70 [ 14.612226] kfree+0x222/0x3f0 [ 14.612346] kasan_strings+0x2aa/0xe80 [ 14.612582] kunit_try_run_case+0x1a5/0x480 [ 14.612806] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.613195] kthread+0x337/0x6f0 [ 14.613362] ret_from_fork+0x116/0x1d0 [ 14.613655] ret_from_fork_asm+0x1a/0x30 [ 14.613836] [ 14.613939] The buggy address belongs to the object at ffff888103a5c540 [ 14.613939] which belongs to the cache kmalloc-32 of size 32 [ 14.614436] The buggy address is located 16 bytes inside of [ 14.614436] freed 32-byte region [ffff888103a5c540, ffff888103a5c560) [ 14.614804] [ 14.614901] The buggy address belongs to the physical page: [ 14.615212] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103a5c [ 14.615575] flags: 0x200000000000000(node=0|zone=2) [ 14.615794] page_type: f5(slab) [ 14.615948] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.616285] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.616693] page dumped because: kasan: bad access detected [ 14.616928] [ 14.617171] Memory state around the buggy address: [ 14.617376] ffff888103a5c400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.617731] ffff888103a5c480: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.618097] >ffff888103a5c500: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.618378] ^ [ 14.618643] ffff888103a5c580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.618946] ffff888103a5c600: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.619242] ==================================================================