Date
July 6, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.491006] ================================================================== [ 20.491126] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 20.491182] Read of size 1 at addr fff00000c56d5090 by task kunit_try_catch/259 [ 20.491475] [ 20.491584] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 20.491705] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.491776] Hardware name: linux,dummy-virt (DT) [ 20.491814] Call trace: [ 20.491839] show_stack+0x20/0x38 (C) [ 20.491891] dump_stack_lvl+0x8c/0xd0 [ 20.492104] print_report+0x118/0x608 [ 20.492171] kasan_report+0xdc/0x128 [ 20.492453] __asan_report_load1_noabort+0x20/0x30 [ 20.492531] kasan_strings+0x95c/0xb00 [ 20.492578] kunit_try_run_case+0x170/0x3f0 [ 20.492930] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.493101] kthread+0x328/0x630 [ 20.493177] ret_from_fork+0x10/0x20 [ 20.493281] [ 20.493310] Allocated by task 259: [ 20.493339] kasan_save_stack+0x3c/0x68 [ 20.493391] kasan_save_track+0x20/0x40 [ 20.493512] kasan_save_alloc_info+0x40/0x58 [ 20.493690] __kasan_kmalloc+0xd4/0xd8 [ 20.493864] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.493940] kasan_strings+0xc8/0xb00 [ 20.494049] kunit_try_run_case+0x170/0x3f0 [ 20.494304] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.494362] kthread+0x328/0x630 [ 20.494743] ret_from_fork+0x10/0x20 [ 20.494934] [ 20.495016] Freed by task 259: [ 20.495111] kasan_save_stack+0x3c/0x68 [ 20.495229] kasan_save_track+0x20/0x40 [ 20.495497] kasan_save_free_info+0x4c/0x78 [ 20.495591] __kasan_slab_free+0x6c/0x98 [ 20.495769] kfree+0x214/0x3c8 [ 20.495907] kasan_strings+0x24c/0xb00 [ 20.496006] kunit_try_run_case+0x170/0x3f0 [ 20.496172] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.496282] kthread+0x328/0x630 [ 20.496412] ret_from_fork+0x10/0x20 [ 20.496859] [ 20.496944] The buggy address belongs to the object at fff00000c56d5080 [ 20.496944] which belongs to the cache kmalloc-32 of size 32 [ 20.497038] The buggy address is located 16 bytes inside of [ 20.497038] freed 32-byte region [fff00000c56d5080, fff00000c56d50a0) [ 20.497179] [ 20.497407] The buggy address belongs to the physical page: [ 20.497470] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056d5 [ 20.497766] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.497909] page_type: f5(slab) [ 20.497980] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.498174] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.498533] page dumped because: kasan: bad access detected [ 20.498588] [ 20.498908] Memory state around the buggy address: [ 20.498977] fff00000c56d4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.499226] fff00000c56d5000: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.499371] >fff00000c56d5080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.499481] ^ [ 20.499865] fff00000c56d5100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.499925] fff00000c56d5180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.500048] ==================================================================
[ 13.556026] ================================================================== [ 13.556628] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 13.557253] Read of size 1 at addr ffff8881027a7e10 by task kunit_try_catch/276 [ 13.557653] [ 13.557749] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.557792] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.557806] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.557829] Call Trace: [ 13.557846] <TASK> [ 13.557865] dump_stack_lvl+0x73/0xb0 [ 13.557894] print_report+0xd1/0x650 [ 13.557916] ? __virt_addr_valid+0x1db/0x2d0 [ 13.557953] ? kasan_strings+0xcbc/0xe80 [ 13.557974] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.557997] ? kasan_strings+0xcbc/0xe80 [ 13.558019] kasan_report+0x141/0x180 [ 13.558042] ? kasan_strings+0xcbc/0xe80 [ 13.558079] __asan_report_load1_noabort+0x18/0x20 [ 13.558104] kasan_strings+0xcbc/0xe80 [ 13.558124] ? trace_hardirqs_on+0x37/0xe0 [ 13.558147] ? __pfx_kasan_strings+0x10/0x10 [ 13.558168] ? finish_task_switch.isra.0+0x153/0x700 [ 13.558190] ? __switch_to+0x47/0xf50 [ 13.558215] ? __schedule+0x10cc/0x2b60 [ 13.558238] ? __pfx_read_tsc+0x10/0x10 [ 13.558258] ? ktime_get_ts64+0x86/0x230 [ 13.558282] kunit_try_run_case+0x1a5/0x480 [ 13.558306] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.558329] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.558353] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.558376] ? __kthread_parkme+0x82/0x180 [ 13.558397] ? preempt_count_sub+0x50/0x80 [ 13.558419] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.558443] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.558466] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.558491] kthread+0x337/0x6f0 [ 13.558563] ? trace_preempt_on+0x20/0xc0 [ 13.558591] ? __pfx_kthread+0x10/0x10 [ 13.558612] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.558635] ? calculate_sigpending+0x7b/0xa0 [ 13.558659] ? __pfx_kthread+0x10/0x10 [ 13.558681] ret_from_fork+0x116/0x1d0 [ 13.558701] ? __pfx_kthread+0x10/0x10 [ 13.558721] ret_from_fork_asm+0x1a/0x30 [ 13.558752] </TASK> [ 13.558765] [ 13.578251] Allocated by task 276: [ 13.578435] kasan_save_stack+0x45/0x70 [ 13.578624] kasan_save_track+0x18/0x40 [ 13.578799] kasan_save_alloc_info+0x3b/0x50 [ 13.578988] __kasan_kmalloc+0xb7/0xc0 [ 13.579163] __kmalloc_cache_noprof+0x189/0x420 [ 13.579317] kasan_strings+0xc0/0xe80 [ 13.580087] kunit_try_run_case+0x1a5/0x480 [ 13.580298] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.580900] kthread+0x337/0x6f0 [ 13.581090] ret_from_fork+0x116/0x1d0 [ 13.581417] ret_from_fork_asm+0x1a/0x30 [ 13.581810] [ 13.581924] Freed by task 276: [ 13.582067] kasan_save_stack+0x45/0x70 [ 13.582391] kasan_save_track+0x18/0x40 [ 13.582804] kasan_save_free_info+0x3f/0x60 [ 13.583143] __kasan_slab_free+0x56/0x70 [ 13.583330] kfree+0x222/0x3f0 [ 13.583671] kasan_strings+0x2aa/0xe80 [ 13.583962] kunit_try_run_case+0x1a5/0x480 [ 13.584118] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.584741] kthread+0x337/0x6f0 [ 13.584903] ret_from_fork+0x116/0x1d0 [ 13.585319] ret_from_fork_asm+0x1a/0x30 [ 13.585701] [ 13.585974] The buggy address belongs to the object at ffff8881027a7e00 [ 13.585974] which belongs to the cache kmalloc-32 of size 32 [ 13.586652] The buggy address is located 16 bytes inside of [ 13.586652] freed 32-byte region [ffff8881027a7e00, ffff8881027a7e20) [ 13.587356] [ 13.587664] The buggy address belongs to the physical page: [ 13.587947] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027a7 [ 13.588429] flags: 0x200000000000000(node=0|zone=2) [ 13.588914] page_type: f5(slab) [ 13.589070] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.589703] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 13.590156] page dumped because: kasan: bad access detected [ 13.590534] [ 13.590626] Memory state around the buggy address: [ 13.590970] ffff8881027a7d00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.591438] ffff8881027a7d80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.591948] >ffff8881027a7e00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.592449] ^ [ 13.592623] ffff8881027a7e80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.592924] ffff8881027a7f00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.593650] ==================================================================