Date
July 22, 2025, 5:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 32.645998] ================================================================== [ 32.646409] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 32.646485] Read of size 1 at addr fff00000c9227a10 by task kunit_try_catch/290 [ 32.646546] [ 32.646707] CPU: 1 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250722 #1 PREEMPT [ 32.646935] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 32.647002] Hardware name: linux,dummy-virt (DT) [ 32.647036] Call trace: [ 32.647106] show_stack+0x20/0x38 (C) [ 32.647422] dump_stack_lvl+0x8c/0xd0 [ 32.647502] print_report+0x118/0x5e8 [ 32.647616] kasan_report+0xdc/0x128 [ 32.647669] __asan_report_load1_noabort+0x20/0x30 [ 32.647747] strnlen+0x80/0x88 [ 32.648067] kasan_strings+0x478/0xb00 [ 32.648230] kunit_try_run_case+0x170/0x3f0 [ 32.648286] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.648340] kthread+0x328/0x630 [ 32.648624] ret_from_fork+0x10/0x20 [ 32.648706] [ 32.648838] Allocated by task 290: [ 32.648910] kasan_save_stack+0x3c/0x68 [ 32.649022] kasan_save_track+0x20/0x40 [ 32.649240] kasan_save_alloc_info+0x40/0x58 [ 32.649443] __kasan_kmalloc+0xd4/0xd8 [ 32.649538] __kmalloc_cache_noprof+0x16c/0x3c0 [ 32.649648] kasan_strings+0xc8/0xb00 [ 32.649737] kunit_try_run_case+0x170/0x3f0 [ 32.649872] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.649972] kthread+0x328/0x630 [ 32.650025] ret_from_fork+0x10/0x20 [ 32.650330] [ 32.650379] Freed by task 290: [ 32.650525] kasan_save_stack+0x3c/0x68 [ 32.650640] kasan_save_track+0x20/0x40 [ 32.650685] kasan_save_free_info+0x4c/0x78 [ 32.650986] __kasan_slab_free+0x6c/0x98 [ 32.651165] kfree+0x214/0x3c8 [ 32.651273] kasan_strings+0x24c/0xb00 [ 32.651399] kunit_try_run_case+0x170/0x3f0 [ 32.651442] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 32.651679] kthread+0x328/0x630 [ 32.651864] ret_from_fork+0x10/0x20 [ 32.651937] [ 32.651961] The buggy address belongs to the object at fff00000c9227a00 [ 32.651961] which belongs to the cache kmalloc-32 of size 32 [ 32.652144] The buggy address is located 16 bytes inside of [ 32.652144] freed 32-byte region [fff00000c9227a00, fff00000c9227a20) [ 32.652214] [ 32.652248] The buggy address belongs to the physical page: [ 32.652286] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109227 [ 32.652372] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 32.652421] page_type: f5(slab) [ 32.652469] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 32.652523] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 32.652566] page dumped because: kasan: bad access detected [ 32.652599] [ 32.652633] Memory state around the buggy address: [ 32.652675] fff00000c9227900: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.652721] fff00000c9227980: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.652766] >fff00000c9227a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.652828] ^ [ 32.652859] fff00000c9227a80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 32.653426] fff00000c9227b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 32.653498] ==================================================================
[ 27.058048] ================================================================== [ 27.059676] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 27.059905] Read of size 1 at addr ffff888106006150 by task kunit_try_catch/307 [ 27.060204] [ 27.060305] CPU: 1 UID: 0 PID: 307 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250722 #1 PREEMPT(voluntary) [ 27.060354] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.060366] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.060388] Call Trace: [ 27.060402] <TASK> [ 27.060417] dump_stack_lvl+0x73/0xb0 [ 27.060444] print_report+0xd1/0x640 [ 27.060513] ? __virt_addr_valid+0x1db/0x2d0 [ 27.060540] ? strnlen+0x73/0x80 [ 27.060560] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.060587] ? strnlen+0x73/0x80 [ 27.060609] kasan_report+0x141/0x180 [ 27.060633] ? strnlen+0x73/0x80 [ 27.060671] __asan_report_load1_noabort+0x18/0x20 [ 27.060697] strnlen+0x73/0x80 [ 27.060720] kasan_strings+0x615/0xe80 [ 27.060753] ? trace_hardirqs_on+0x37/0xe0 [ 27.060777] ? __pfx_kasan_strings+0x10/0x10 [ 27.060798] ? finish_task_switch.isra.0+0x153/0x700 [ 27.060820] ? __switch_to+0x47/0xf80 [ 27.060856] ? __schedule+0x10da/0x2b60 [ 27.060900] ? __pfx_read_tsc+0x10/0x10 [ 27.060923] ? ktime_get_ts64+0x86/0x230 [ 27.060948] kunit_try_run_case+0x1a5/0x480 [ 27.060985] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.061008] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.061034] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.061061] ? __kthread_parkme+0x82/0x180 [ 27.061090] ? preempt_count_sub+0x50/0x80 [ 27.061113] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.061137] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.061171] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.061206] kthread+0x337/0x6f0 [ 27.061226] ? trace_preempt_on+0x20/0xc0 [ 27.061249] ? __pfx_kthread+0x10/0x10 [ 27.061270] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.061303] ? calculate_sigpending+0x7b/0xa0 [ 27.061326] ? __pfx_kthread+0x10/0x10 [ 27.061348] ret_from_fork+0x116/0x1d0 [ 27.061381] ? __pfx_kthread+0x10/0x10 [ 27.061403] ret_from_fork_asm+0x1a/0x30 [ 27.061433] </TASK> [ 27.061444] [ 27.069907] Allocated by task 307: [ 27.070145] kasan_save_stack+0x45/0x70 [ 27.070336] kasan_save_track+0x18/0x40 [ 27.070636] kasan_save_alloc_info+0x3b/0x50 [ 27.070810] __kasan_kmalloc+0xb7/0xc0 [ 27.071007] __kmalloc_cache_noprof+0x189/0x420 [ 27.071270] kasan_strings+0xc0/0xe80 [ 27.071445] kunit_try_run_case+0x1a5/0x480 [ 27.071675] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.071951] kthread+0x337/0x6f0 [ 27.072133] ret_from_fork+0x116/0x1d0 [ 27.072316] ret_from_fork_asm+0x1a/0x30 [ 27.072459] [ 27.072525] Freed by task 307: [ 27.072633] kasan_save_stack+0x45/0x70 [ 27.072768] kasan_save_track+0x18/0x40 [ 27.072918] kasan_save_free_info+0x3f/0x60 [ 27.073066] __kasan_slab_free+0x56/0x70 [ 27.073204] kfree+0x222/0x3f0 [ 27.073319] kasan_strings+0x2aa/0xe80 [ 27.073464] kunit_try_run_case+0x1a5/0x480 [ 27.073748] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.074018] kthread+0x337/0x6f0 [ 27.074195] ret_from_fork+0x116/0x1d0 [ 27.074384] ret_from_fork_asm+0x1a/0x30 [ 27.074761] [ 27.074871] The buggy address belongs to the object at ffff888106006140 [ 27.074871] which belongs to the cache kmalloc-32 of size 32 [ 27.075748] The buggy address is located 16 bytes inside of [ 27.075748] freed 32-byte region [ffff888106006140, ffff888106006160) [ 27.076290] [ 27.076385] The buggy address belongs to the physical page: [ 27.076906] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106006 [ 27.077430] flags: 0x200000000000000(node=0|zone=2) [ 27.077721] page_type: f5(slab) [ 27.077876] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 27.078160] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 27.078429] page dumped because: kasan: bad access detected [ 27.078801] [ 27.078927] Memory state around the buggy address: [ 27.079151] ffff888106006000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.079515] ffff888106006080: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.079969] >ffff888106006100: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 27.080563] ^ [ 27.080878] ffff888106006180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.081136] ffff888106006200: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 27.081360] ==================================================================