Date
July 10, 2025, 6:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.180790] ================================================================== [ 19.180852] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 19.180904] Read of size 1 at addr fff00000c5a4d450 by task kunit_try_catch/259 [ 19.181108] [ 19.181191] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.181283] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.181480] Hardware name: linux,dummy-virt (DT) [ 19.181643] Call trace: [ 19.181675] show_stack+0x20/0x38 (C) [ 19.181731] dump_stack_lvl+0x8c/0xd0 [ 19.182214] print_report+0x118/0x608 [ 19.182458] kasan_report+0xdc/0x128 [ 19.182523] __asan_report_load1_noabort+0x20/0x30 [ 19.182779] strlen+0xa8/0xb0 [ 19.182971] kasan_strings+0x418/0xb00 [ 19.183183] kunit_try_run_case+0x170/0x3f0 [ 19.183540] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.183746] kthread+0x328/0x630 [ 19.183850] ret_from_fork+0x10/0x20 [ 19.184041] [ 19.184356] Allocated by task 259: [ 19.184624] kasan_save_stack+0x3c/0x68 [ 19.184785] kasan_save_track+0x20/0x40 [ 19.184874] kasan_save_alloc_info+0x40/0x58 [ 19.185172] __kasan_kmalloc+0xd4/0xd8 [ 19.185228] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.185569] kasan_strings+0xc8/0xb00 [ 19.186029] kunit_try_run_case+0x170/0x3f0 [ 19.186150] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.186242] kthread+0x328/0x630 [ 19.186280] ret_from_fork+0x10/0x20 [ 19.186359] [ 19.186382] Freed by task 259: [ 19.186684] kasan_save_stack+0x3c/0x68 [ 19.186784] kasan_save_track+0x20/0x40 [ 19.186872] kasan_save_free_info+0x4c/0x78 [ 19.187023] __kasan_slab_free+0x6c/0x98 [ 19.187117] kfree+0x214/0x3c8 [ 19.187241] kasan_strings+0x24c/0xb00 [ 19.187487] kunit_try_run_case+0x170/0x3f0 [ 19.187712] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.187854] kthread+0x328/0x630 [ 19.188014] ret_from_fork+0x10/0x20 [ 19.188112] [ 19.188239] The buggy address belongs to the object at fff00000c5a4d440 [ 19.188239] which belongs to the cache kmalloc-32 of size 32 [ 19.188334] The buggy address is located 16 bytes inside of [ 19.188334] freed 32-byte region [fff00000c5a4d440, fff00000c5a4d460) [ 19.188529] [ 19.188564] The buggy address belongs to the physical page: [ 19.188835] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a4d [ 19.188987] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.189148] page_type: f5(slab) [ 19.189257] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.189330] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.189656] page dumped because: kasan: bad access detected [ 19.189773] [ 19.189807] Memory state around the buggy address: [ 19.189850] fff00000c5a4d300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.189897] fff00000c5a4d380: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.189995] >fff00000c5a4d400: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.190039] ^ [ 19.190079] fff00000c5a4d480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.190440] fff00000c5a4d500: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.190592] ==================================================================
[ 14.452529] ================================================================== [ 14.453389] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.454072] Read of size 1 at addr ffff8881027b2750 by task kunit_try_catch/276 [ 14.454622] [ 14.455163] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.455212] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.455225] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.455246] Call Trace: [ 14.455262] <TASK> [ 14.455284] dump_stack_lvl+0x73/0xb0 [ 14.455313] print_report+0xd1/0x650 [ 14.455335] ? __virt_addr_valid+0x1db/0x2d0 [ 14.455357] ? strlen+0x8f/0xb0 [ 14.455373] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.455397] ? strlen+0x8f/0xb0 [ 14.455414] kasan_report+0x141/0x180 [ 14.455438] ? strlen+0x8f/0xb0 [ 14.455461] __asan_report_load1_noabort+0x18/0x20 [ 14.455486] strlen+0x8f/0xb0 [ 14.455504] kasan_strings+0x57b/0xe80 [ 14.455524] ? trace_hardirqs_on+0x37/0xe0 [ 14.455547] ? __pfx_kasan_strings+0x10/0x10 [ 14.455570] ? __kasan_check_write+0x18/0x20 [ 14.455590] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.455613] ? irqentry_exit+0x2a/0x60 [ 14.455635] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 14.455661] ? trace_hardirqs_on+0x37/0xe0 [ 14.455682] ? __pfx_read_tsc+0x10/0x10 [ 14.455703] ? ktime_get_ts64+0x86/0x230 [ 14.455727] kunit_try_run_case+0x1a5/0x480 [ 14.455751] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.455776] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.455800] ? __kthread_parkme+0x82/0x180 [ 14.455874] ? preempt_count_sub+0x50/0x80 [ 14.455899] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.455924] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.455970] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.455996] kthread+0x337/0x6f0 [ 14.456015] ? trace_preempt_on+0x20/0xc0 [ 14.456050] ? __pfx_kthread+0x10/0x10 [ 14.456070] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.456091] ? calculate_sigpending+0x7b/0xa0 [ 14.456116] ? __pfx_kthread+0x10/0x10 [ 14.456136] ret_from_fork+0x116/0x1d0 [ 14.456154] ? __pfx_kthread+0x10/0x10 [ 14.456175] ret_from_fork_asm+0x1a/0x30 [ 14.456205] </TASK> [ 14.456215] [ 14.466977] Allocated by task 276: [ 14.467349] kasan_save_stack+0x45/0x70 [ 14.467538] kasan_save_track+0x18/0x40 [ 14.467726] kasan_save_alloc_info+0x3b/0x50 [ 14.468213] __kasan_kmalloc+0xb7/0xc0 [ 14.468400] __kmalloc_cache_noprof+0x189/0x420 [ 14.468578] kasan_strings+0xc0/0xe80 [ 14.468762] kunit_try_run_case+0x1a5/0x480 [ 14.469328] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.469546] kthread+0x337/0x6f0 [ 14.469718] ret_from_fork+0x116/0x1d0 [ 14.470150] ret_from_fork_asm+0x1a/0x30 [ 14.470343] [ 14.470446] Freed by task 276: [ 14.470584] kasan_save_stack+0x45/0x70 [ 14.470766] kasan_save_track+0x18/0x40 [ 14.471308] kasan_save_free_info+0x3f/0x60 [ 14.471482] __kasan_slab_free+0x56/0x70 [ 14.471777] kfree+0x222/0x3f0 [ 14.472005] kasan_strings+0x2aa/0xe80 [ 14.472219] kunit_try_run_case+0x1a5/0x480 [ 14.472403] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.472618] kthread+0x337/0x6f0 [ 14.472785] ret_from_fork+0x116/0x1d0 [ 14.473365] ret_from_fork_asm+0x1a/0x30 [ 14.473525] [ 14.473621] The buggy address belongs to the object at ffff8881027b2740 [ 14.473621] which belongs to the cache kmalloc-32 of size 32 [ 14.474319] The buggy address is located 16 bytes inside of [ 14.474319] freed 32-byte region [ffff8881027b2740, ffff8881027b2760) [ 14.474788] [ 14.475300] The buggy address belongs to the physical page: [ 14.475507] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027b2 [ 14.475858] flags: 0x200000000000000(node=0|zone=2) [ 14.476345] page_type: f5(slab) [ 14.476510] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.476868] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.477253] page dumped because: kasan: bad access detected [ 14.477493] [ 14.477564] Memory state around the buggy address: [ 14.477769] ffff8881027b2600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.478498] ffff8881027b2680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.478791] >ffff8881027b2700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.479262] ^ [ 14.479519] ffff8881027b2780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.479819] ffff8881027b2800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.480250] ==================================================================