Date
July 1, 2025, 12:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.721123] ================================================================== [ 19.721329] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 19.721518] Read of size 1 at addr fff00000c79f3950 by task kunit_try_catch/259 [ 19.721578] [ 19.721612] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.722057] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.722181] Hardware name: linux,dummy-virt (DT) [ 19.722375] Call trace: [ 19.722411] show_stack+0x20/0x38 (C) [ 19.722482] dump_stack_lvl+0x8c/0xd0 [ 19.722696] print_report+0x118/0x608 [ 19.722889] kasan_report+0xdc/0x128 [ 19.723013] __asan_report_load1_noabort+0x20/0x30 [ 19.723071] strnlen+0x80/0x88 [ 19.723294] kasan_strings+0x478/0xb00 [ 19.723347] kunit_try_run_case+0x170/0x3f0 [ 19.723404] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.723608] kthread+0x328/0x630 [ 19.723816] ret_from_fork+0x10/0x20 [ 19.724159] [ 19.724295] Allocated by task 259: [ 19.724352] kasan_save_stack+0x3c/0x68 [ 19.724581] kasan_save_track+0x20/0x40 [ 19.725051] kasan_save_alloc_info+0x40/0x58 [ 19.725125] __kasan_kmalloc+0xd4/0xd8 [ 19.725181] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.725225] kasan_strings+0xc8/0xb00 [ 19.725305] kunit_try_run_case+0x170/0x3f0 [ 19.725368] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.725417] kthread+0x328/0x630 [ 19.725463] ret_from_fork+0x10/0x20 [ 19.725512] [ 19.725541] Freed by task 259: [ 19.725592] kasan_save_stack+0x3c/0x68 [ 19.725642] kasan_save_track+0x20/0x40 [ 19.725690] kasan_save_free_info+0x4c/0x78 [ 19.725733] __kasan_slab_free+0x6c/0x98 [ 19.725774] kfree+0x214/0x3c8 [ 19.725810] kasan_strings+0x24c/0xb00 [ 19.725848] kunit_try_run_case+0x170/0x3f0 [ 19.725897] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.725953] kthread+0x328/0x630 [ 19.725996] ret_from_fork+0x10/0x20 [ 19.726046] [ 19.726077] The buggy address belongs to the object at fff00000c79f3940 [ 19.726077] which belongs to the cache kmalloc-32 of size 32 [ 19.726160] The buggy address is located 16 bytes inside of [ 19.726160] freed 32-byte region [fff00000c79f3940, fff00000c79f3960) [ 19.726225] [ 19.726253] The buggy address belongs to the physical page: [ 19.726303] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1079f3 [ 19.726375] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.726440] page_type: f5(slab) [ 19.726488] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.726541] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.726594] page dumped because: kasan: bad access detected [ 19.726639] [ 19.726660] Memory state around the buggy address: [ 19.726701] fff00000c79f3800: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.726762] fff00000c79f3880: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.726814] >fff00000c79f3900: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.726867] ^ [ 19.726907] fff00000c79f3980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.726953] fff00000c79f3a00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.727296] ==================================================================
[ 13.397066] ================================================================== [ 13.397650] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.397938] Read of size 1 at addr ffff888103124410 by task kunit_try_catch/276 [ 13.398355] [ 13.398460] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.398504] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.398517] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.398537] Call Trace: [ 13.398551] <TASK> [ 13.398567] dump_stack_lvl+0x73/0xb0 [ 13.398591] print_report+0xd1/0x650 [ 13.398612] ? __virt_addr_valid+0x1db/0x2d0 [ 13.398634] ? strnlen+0x73/0x80 [ 13.398650] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.398671] ? strnlen+0x73/0x80 [ 13.398689] kasan_report+0x141/0x180 [ 13.398709] ? strnlen+0x73/0x80 [ 13.398730] __asan_report_load1_noabort+0x18/0x20 [ 13.398754] strnlen+0x73/0x80 [ 13.398771] kasan_strings+0x615/0xe80 [ 13.398790] ? trace_hardirqs_on+0x37/0xe0 [ 13.398811] ? __pfx_kasan_strings+0x10/0x10 [ 13.398831] ? finish_task_switch.isra.0+0x153/0x700 [ 13.398851] ? __switch_to+0x47/0xf50 [ 13.398874] ? __schedule+0x10cc/0x2b60 [ 13.398895] ? __pfx_read_tsc+0x10/0x10 [ 13.398915] ? ktime_get_ts64+0x86/0x230 [ 13.398937] kunit_try_run_case+0x1a5/0x480 [ 13.398960] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.398982] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.399003] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.399036] ? __kthread_parkme+0x82/0x180 [ 13.399059] ? preempt_count_sub+0x50/0x80 [ 13.399081] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.399104] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.399126] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.399149] kthread+0x337/0x6f0 [ 13.399167] ? trace_preempt_on+0x20/0xc0 [ 13.399188] ? __pfx_kthread+0x10/0x10 [ 13.399208] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.399227] ? calculate_sigpending+0x7b/0xa0 [ 13.399249] ? __pfx_kthread+0x10/0x10 [ 13.399270] ret_from_fork+0x116/0x1d0 [ 13.399286] ? __pfx_kthread+0x10/0x10 [ 13.399305] ret_from_fork_asm+0x1a/0x30 [ 13.399335] </TASK> [ 13.399345] [ 13.406480] Allocated by task 276: [ 13.406657] kasan_save_stack+0x45/0x70 [ 13.406814] kasan_save_track+0x18/0x40 [ 13.406997] kasan_save_alloc_info+0x3b/0x50 [ 13.407256] __kasan_kmalloc+0xb7/0xc0 [ 13.407431] __kmalloc_cache_noprof+0x189/0x420 [ 13.407605] kasan_strings+0xc0/0xe80 [ 13.407737] kunit_try_run_case+0x1a5/0x480 [ 13.407879] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.408070] kthread+0x337/0x6f0 [ 13.408247] ret_from_fork+0x116/0x1d0 [ 13.408433] ret_from_fork_asm+0x1a/0x30 [ 13.408625] [ 13.408715] Freed by task 276: [ 13.408864] kasan_save_stack+0x45/0x70 [ 13.408998] kasan_save_track+0x18/0x40 [ 13.409247] kasan_save_free_info+0x3f/0x60 [ 13.409454] __kasan_slab_free+0x56/0x70 [ 13.409605] kfree+0x222/0x3f0 [ 13.409721] kasan_strings+0x2aa/0xe80 [ 13.409851] kunit_try_run_case+0x1a5/0x480 [ 13.410074] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.410557] kthread+0x337/0x6f0 [ 13.410723] ret_from_fork+0x116/0x1d0 [ 13.410882] ret_from_fork_asm+0x1a/0x30 [ 13.411065] [ 13.411143] The buggy address belongs to the object at ffff888103124400 [ 13.411143] which belongs to the cache kmalloc-32 of size 32 [ 13.411642] The buggy address is located 16 bytes inside of [ 13.411642] freed 32-byte region [ffff888103124400, ffff888103124420) [ 13.412089] [ 13.412172] The buggy address belongs to the physical page: [ 13.412344] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103124 [ 13.412581] flags: 0x200000000000000(node=0|zone=2) [ 13.412740] page_type: f5(slab) [ 13.412858] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.413095] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.413318] page dumped because: kasan: bad access detected [ 13.413486] [ 13.413555] Memory state around the buggy address: [ 13.413707] ffff888103124300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.414202] ffff888103124380: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.414516] >ffff888103124400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.414829] ^ [ 13.415010] ffff888103124480: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.415336] ffff888103124500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.415645] ==================================================================