Date
July 15, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.763234] ================================================================== [ 17.763290] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 17.763341] Read of size 1 at addr fff00000c5977b10 by task kunit_try_catch/260 [ 17.763395] [ 17.763425] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 17.763509] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.764771] Hardware name: linux,dummy-virt (DT) [ 17.764829] Call trace: [ 17.764862] show_stack+0x20/0x38 (C) [ 17.765249] dump_stack_lvl+0x8c/0xd0 [ 17.765304] print_report+0x118/0x5d0 [ 17.765357] kasan_report+0xdc/0x128 [ 17.765451] __asan_report_load1_noabort+0x20/0x30 [ 17.765507] strlen+0xa8/0xb0 [ 17.765549] kasan_strings+0x418/0xb00 [ 17.765596] kunit_try_run_case+0x170/0x3f0 [ 17.765645] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.765702] kthread+0x328/0x630 [ 17.765745] ret_from_fork+0x10/0x20 [ 17.765794] [ 17.765816] Allocated by task 260: [ 17.765846] kasan_save_stack+0x3c/0x68 [ 17.765888] kasan_save_track+0x20/0x40 [ 17.765926] kasan_save_alloc_info+0x40/0x58 [ 17.765968] __kasan_kmalloc+0xd4/0xd8 [ 17.766004] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.766043] kasan_strings+0xc8/0xb00 [ 17.766081] kunit_try_run_case+0x170/0x3f0 [ 17.766120] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.766164] kthread+0x328/0x630 [ 17.766209] ret_from_fork+0x10/0x20 [ 17.766246] [ 17.766265] Freed by task 260: [ 17.766295] kasan_save_stack+0x3c/0x68 [ 17.766336] kasan_save_track+0x20/0x40 [ 17.766389] kasan_save_free_info+0x4c/0x78 [ 17.766433] __kasan_slab_free+0x6c/0x98 [ 17.766471] kfree+0x214/0x3c8 [ 17.766506] kasan_strings+0x24c/0xb00 [ 17.766542] kunit_try_run_case+0x170/0x3f0 [ 17.766582] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.766628] kthread+0x328/0x630 [ 17.766660] ret_from_fork+0x10/0x20 [ 17.766788] [ 17.766838] The buggy address belongs to the object at fff00000c5977b00 [ 17.766838] which belongs to the cache kmalloc-32 of size 32 [ 17.767011] The buggy address is located 16 bytes inside of [ 17.767011] freed 32-byte region [fff00000c5977b00, fff00000c5977b20) [ 17.767131] [ 17.767416] The buggy address belongs to the physical page: [ 17.767662] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105977 [ 17.767844] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.768037] page_type: f5(slab) [ 17.768092] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.768146] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.768202] page dumped because: kasan: bad access detected [ 17.768731] [ 17.768755] Memory state around the buggy address: [ 17.768791] fff00000c5977a00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.769905] fff00000c5977a80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.770093] >fff00000c5977b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.770138] ^ [ 17.770423] fff00000c5977b80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.770697] fff00000c5977c00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.770742] ==================================================================
[ 14.489274] ================================================================== [ 14.489531] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.489789] Read of size 1 at addr ffff8881038e8050 by task kunit_try_catch/276 [ 14.490234] [ 14.490365] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.490413] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.490425] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.490581] Call Trace: [ 14.490602] <TASK> [ 14.490615] dump_stack_lvl+0x73/0xb0 [ 14.490645] print_report+0xd1/0x610 [ 14.490669] ? __virt_addr_valid+0x1db/0x2d0 [ 14.490692] ? strlen+0x8f/0xb0 [ 14.490708] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.490733] ? strlen+0x8f/0xb0 [ 14.490750] kasan_report+0x141/0x180 [ 14.490787] ? strlen+0x8f/0xb0 [ 14.490809] __asan_report_load1_noabort+0x18/0x20 [ 14.490834] strlen+0x8f/0xb0 [ 14.490852] kasan_strings+0x57b/0xe80 [ 14.490872] ? trace_hardirqs_on+0x37/0xe0 [ 14.490896] ? __pfx_kasan_strings+0x10/0x10 [ 14.490917] ? finish_task_switch.isra.0+0x153/0x700 [ 14.490940] ? __switch_to+0x47/0xf50 [ 14.490966] ? __schedule+0x10cc/0x2b60 [ 14.490989] ? __pfx_read_tsc+0x10/0x10 [ 14.491010] ? ktime_get_ts64+0x86/0x230 [ 14.491034] kunit_try_run_case+0x1a5/0x480 [ 14.491059] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.491084] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.491109] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.491133] ? __kthread_parkme+0x82/0x180 [ 14.491154] ? preempt_count_sub+0x50/0x80 [ 14.491178] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.491203] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.491228] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.491254] kthread+0x337/0x6f0 [ 14.491274] ? trace_preempt_on+0x20/0xc0 [ 14.491297] ? __pfx_kthread+0x10/0x10 [ 14.491319] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.491341] ? calculate_sigpending+0x7b/0xa0 [ 14.491422] ? __pfx_kthread+0x10/0x10 [ 14.491452] ret_from_fork+0x116/0x1d0 [ 14.491471] ? __pfx_kthread+0x10/0x10 [ 14.491493] ret_from_fork_asm+0x1a/0x30 [ 14.491523] </TASK> [ 14.491533] [ 14.499230] Allocated by task 276: [ 14.499379] kasan_save_stack+0x45/0x70 [ 14.499522] kasan_save_track+0x18/0x40 [ 14.499715] kasan_save_alloc_info+0x3b/0x50 [ 14.500074] __kasan_kmalloc+0xb7/0xc0 [ 14.500293] __kmalloc_cache_noprof+0x189/0x420 [ 14.500599] kasan_strings+0xc0/0xe80 [ 14.500810] kunit_try_run_case+0x1a5/0x480 [ 14.501024] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.501269] kthread+0x337/0x6f0 [ 14.501494] ret_from_fork+0x116/0x1d0 [ 14.501659] ret_from_fork_asm+0x1a/0x30 [ 14.501851] [ 14.501944] Freed by task 276: [ 14.502091] kasan_save_stack+0x45/0x70 [ 14.502260] kasan_save_track+0x18/0x40 [ 14.502405] kasan_save_free_info+0x3f/0x60 [ 14.502552] __kasan_slab_free+0x56/0x70 [ 14.502691] kfree+0x222/0x3f0 [ 14.502839] kasan_strings+0x2aa/0xe80 [ 14.503026] kunit_try_run_case+0x1a5/0x480 [ 14.503230] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.503849] kthread+0x337/0x6f0 [ 14.504104] ret_from_fork+0x116/0x1d0 [ 14.504238] ret_from_fork_asm+0x1a/0x30 [ 14.504375] [ 14.504446] The buggy address belongs to the object at ffff8881038e8040 [ 14.504446] which belongs to the cache kmalloc-32 of size 32 [ 14.505476] The buggy address is located 16 bytes inside of [ 14.505476] freed 32-byte region [ffff8881038e8040, ffff8881038e8060) [ 14.505954] [ 14.506057] The buggy address belongs to the physical page: [ 14.506233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e8 [ 14.506885] flags: 0x200000000000000(node=0|zone=2) [ 14.507130] page_type: f5(slab) [ 14.507283] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.507673] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.507996] page dumped because: kasan: bad access detected [ 14.508225] [ 14.508298] Memory state around the buggy address: [ 14.508533] ffff8881038e7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.508809] ffff8881038e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.509111] >ffff8881038e8000: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.509329] ^ [ 14.509547] ffff8881038e8080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.509877] ffff8881038e8100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.510164] ==================================================================