Date
May 13, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.463349] ================================================================== [ 21.463438] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 21.463615] Read of size 1 at addr fff00000c7794c90 by task kunit_try_catch/259 [ 21.463681] [ 21.463730] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT [ 21.463830] Tainted: [B]=BAD_PAGE, [N]=TEST [ 21.463865] Hardware name: linux,dummy-virt (DT) [ 21.463906] Call trace: [ 21.463945] show_stack+0x20/0x38 (C) [ 21.464087] dump_stack_lvl+0x8c/0xd0 [ 21.464179] print_report+0x118/0x608 [ 21.464240] kasan_report+0xdc/0x128 [ 21.464295] __asan_report_load1_noabort+0x20/0x30 [ 21.464353] strnlen+0x80/0x88 [ 21.464442] kasan_strings+0x478/0xb00 [ 21.464527] kunit_try_run_case+0x170/0x3f0 [ 21.464620] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.464724] kthread+0x328/0x630 [ 21.464789] ret_from_fork+0x10/0x20 [ 21.465169] [ 21.465203] Allocated by task 259: [ 21.465240] kasan_save_stack+0x3c/0x68 [ 21.465295] kasan_save_track+0x20/0x40 [ 21.465341] kasan_save_alloc_info+0x40/0x58 [ 21.465384] __kasan_kmalloc+0xd4/0xd8 [ 21.465428] __kmalloc_cache_noprof+0x15c/0x3c0 [ 21.465570] kasan_strings+0xc8/0xb00 [ 21.465622] kunit_try_run_case+0x170/0x3f0 [ 21.465666] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.465718] kthread+0x328/0x630 [ 21.465760] ret_from_fork+0x10/0x20 [ 21.465833] [ 21.465870] Freed by task 259: [ 21.465908] kasan_save_stack+0x3c/0x68 [ 21.465956] kasan_save_track+0x20/0x40 [ 21.466021] kasan_save_free_info+0x4c/0x78 [ 21.466084] __kasan_slab_free+0x6c/0x98 [ 21.466167] kfree+0x214/0x3c8 [ 21.466216] kasan_strings+0x24c/0xb00 [ 21.466259] kunit_try_run_case+0x170/0x3f0 [ 21.466304] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.466354] kthread+0x328/0x630 [ 21.466517] ret_from_fork+0x10/0x20 [ 21.466588] [ 21.466785] The buggy address belongs to the object at fff00000c7794c80 [ 21.466785] which belongs to the cache kmalloc-32 of size 32 [ 21.466875] The buggy address is located 16 bytes inside of [ 21.466875] freed 32-byte region [fff00000c7794c80, fff00000c7794ca0) [ 21.467375] [ 21.467554] The buggy address belongs to the physical page: [ 21.467601] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107794 [ 21.467742] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.467834] page_type: f5(slab) [ 21.468051] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.468120] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.468175] page dumped because: kasan: bad access detected [ 21.468215] [ 21.468240] Memory state around the buggy address: [ 21.468282] fff00000c7794b80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.468615] fff00000c7794c00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.468839] >fff00000c7794c80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.468900] ^ [ 21.469135] fff00000c7794d00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.469818] fff00000c7794d80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.470269] ==================================================================
[ 13.117663] ================================================================== [ 13.118328] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.118714] Read of size 1 at addr ffff8881029e6650 by task kunit_try_catch/276 [ 13.118975] [ 13.119084] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) [ 13.119129] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.119141] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.119161] Call Trace: [ 13.119174] <TASK> [ 13.119186] dump_stack_lvl+0x73/0xb0 [ 13.119212] print_report+0xd1/0x650 [ 13.119245] ? __virt_addr_valid+0x1db/0x2d0 [ 13.119268] ? strnlen+0x73/0x80 [ 13.119289] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.119323] ? strnlen+0x73/0x80 [ 13.119345] kasan_report+0x141/0x180 [ 13.119368] ? strnlen+0x73/0x80 [ 13.119394] __asan_report_load1_noabort+0x18/0x20 [ 13.119415] strnlen+0x73/0x80 [ 13.119438] kasan_strings+0x615/0xe80 [ 13.119458] ? trace_hardirqs_on+0x37/0xe0 [ 13.119481] ? __pfx_kasan_strings+0x10/0x10 [ 13.119502] ? finish_task_switch.isra.0+0x153/0x700 [ 13.119564] ? __switch_to+0x47/0xf50 [ 13.119593] ? __schedule+0x10cc/0x2b60 [ 13.119642] ? __pfx_read_tsc+0x10/0x10 [ 13.119664] ? ktime_get_ts64+0x86/0x230 [ 13.119688] kunit_try_run_case+0x1a5/0x480 [ 13.119712] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.119734] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.119757] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.119780] ? __kthread_parkme+0x82/0x180 [ 13.119799] ? preempt_count_sub+0x50/0x80 [ 13.119822] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.119846] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.119869] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.119894] kthread+0x337/0x6f0 [ 13.119916] ? trace_preempt_on+0x20/0xc0 [ 13.119939] ? __pfx_kthread+0x10/0x10 [ 13.119961] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.119981] ? calculate_sigpending+0x7b/0xa0 [ 13.120004] ? __pfx_kthread+0x10/0x10 [ 13.120027] ret_from_fork+0x116/0x1d0 [ 13.120057] ? __pfx_kthread+0x10/0x10 [ 13.120077] ret_from_fork_asm+0x1a/0x30 [ 13.120118] </TASK> [ 13.120129] [ 13.128690] Allocated by task 276: [ 13.128963] kasan_save_stack+0x45/0x70 [ 13.129110] kasan_save_track+0x18/0x40 [ 13.129245] kasan_save_alloc_info+0x3b/0x50 [ 13.129455] __kasan_kmalloc+0xb7/0xc0 [ 13.129678] __kmalloc_cache_noprof+0x189/0x420 [ 13.129991] kasan_strings+0xc0/0xe80 [ 13.130162] kunit_try_run_case+0x1a5/0x480 [ 13.130309] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.130488] kthread+0x337/0x6f0 [ 13.130782] ret_from_fork+0x116/0x1d0 [ 13.130976] ret_from_fork_asm+0x1a/0x30 [ 13.131172] [ 13.131384] Freed by task 276: [ 13.131582] kasan_save_stack+0x45/0x70 [ 13.131795] kasan_save_track+0x18/0x40 [ 13.131959] kasan_save_free_info+0x3f/0x60 [ 13.132101] __kasan_slab_free+0x56/0x70 [ 13.132239] kfree+0x222/0x3f0 [ 13.132424] kasan_strings+0x2aa/0xe80 [ 13.132673] kunit_try_run_case+0x1a5/0x480 [ 13.132887] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.133141] kthread+0x337/0x6f0 [ 13.133402] ret_from_fork+0x116/0x1d0 [ 13.133784] ret_from_fork_asm+0x1a/0x30 [ 13.134001] [ 13.134110] The buggy address belongs to the object at ffff8881029e6640 [ 13.134110] which belongs to the cache kmalloc-32 of size 32 [ 13.134687] The buggy address is located 16 bytes inside of [ 13.134687] freed 32-byte region [ffff8881029e6640, ffff8881029e6660) [ 13.135041] [ 13.135116] The buggy address belongs to the physical page: [ 13.135449] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029e6 [ 13.135815] flags: 0x200000000000000(node=0|zone=2) [ 13.135981] page_type: f5(slab) [ 13.136105] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.136408] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.136856] page dumped because: kasan: bad access detected [ 13.137158] [ 13.137312] Memory state around the buggy address: [ 13.137578] ffff8881029e6500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.137896] ffff8881029e6580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.138150] >ffff8881029e6600: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.138508] ^ [ 13.138766] ffff8881029e6680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.139058] ffff8881029e6700: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.139380] ==================================================================