Date
July 19, 2025, 11:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.567853] ================================================================== [ 17.567907] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 17.568291] Read of size 1 at addr fff00000c77dfad0 by task kunit_try_catch/260 [ 17.568403] [ 17.568477] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 17.568573] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.568602] Hardware name: linux,dummy-virt (DT) [ 17.568634] Call trace: [ 17.568661] show_stack+0x20/0x38 (C) [ 17.568714] dump_stack_lvl+0x8c/0xd0 [ 17.569123] print_report+0x118/0x5d0 [ 17.569207] kasan_report+0xdc/0x128 [ 17.569259] __asan_report_load1_noabort+0x20/0x30 [ 17.569689] strnlen+0x80/0x88 [ 17.569799] kasan_strings+0x478/0xb00 [ 17.569936] kunit_try_run_case+0x170/0x3f0 [ 17.570088] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.570191] kthread+0x328/0x630 [ 17.570281] ret_from_fork+0x10/0x20 [ 17.570438] [ 17.570802] Allocated by task 260: [ 17.570951] kasan_save_stack+0x3c/0x68 [ 17.571112] kasan_save_track+0x20/0x40 [ 17.571228] kasan_save_alloc_info+0x40/0x58 [ 17.571348] __kasan_kmalloc+0xd4/0xd8 [ 17.571447] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.571718] kasan_strings+0xc8/0xb00 [ 17.571898] kunit_try_run_case+0x170/0x3f0 [ 17.571970] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.572154] kthread+0x328/0x630 [ 17.572202] ret_from_fork+0x10/0x20 [ 17.572388] [ 17.572608] Freed by task 260: [ 17.572816] kasan_save_stack+0x3c/0x68 [ 17.572976] kasan_save_track+0x20/0x40 [ 17.573576] kasan_save_free_info+0x4c/0x78 [ 17.573797] __kasan_slab_free+0x6c/0x98 [ 17.573886] kfree+0x214/0x3c8 [ 17.573993] kasan_strings+0x24c/0xb00 [ 17.574034] kunit_try_run_case+0x170/0x3f0 [ 17.574074] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.574589] kthread+0x328/0x630 [ 17.574683] ret_from_fork+0x10/0x20 [ 17.574834] [ 17.574892] The buggy address belongs to the object at fff00000c77dfac0 [ 17.574892] which belongs to the cache kmalloc-32 of size 32 [ 17.575011] The buggy address is located 16 bytes inside of [ 17.575011] freed 32-byte region [fff00000c77dfac0, fff00000c77dfae0) [ 17.575112] [ 17.575537] The buggy address belongs to the physical page: [ 17.575653] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1077df [ 17.575748] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.575879] page_type: f5(slab) [ 17.575923] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.576008] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.576191] page dumped because: kasan: bad access detected [ 17.576406] [ 17.576470] Memory state around the buggy address: [ 17.576863] fff00000c77df980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.577017] fff00000c77dfa00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 17.577104] >fff00000c77dfa80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.577237] ^ [ 17.577498] fff00000c77dfb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.577683] fff00000c77dfb80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.577771] ==================================================================
[ 14.022426] ================================================================== [ 14.022792] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 14.023007] Read of size 1 at addr ffff8881039fe2d0 by task kunit_try_catch/277 [ 14.023464] [ 14.023561] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.023605] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.023617] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.023638] Call Trace: [ 14.023650] <TASK> [ 14.023662] dump_stack_lvl+0x73/0xb0 [ 14.023689] print_report+0xd1/0x610 [ 14.023710] ? __virt_addr_valid+0x1db/0x2d0 [ 14.023732] ? strnlen+0x73/0x80 [ 14.023748] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.023771] ? strnlen+0x73/0x80 [ 14.023788] kasan_report+0x141/0x180 [ 14.023810] ? strnlen+0x73/0x80 [ 14.023831] __asan_report_load1_noabort+0x18/0x20 [ 14.023855] strnlen+0x73/0x80 [ 14.023874] kasan_strings+0x615/0xe80 [ 14.023892] ? trace_hardirqs_on+0x37/0xe0 [ 14.023915] ? __pfx_kasan_strings+0x10/0x10 [ 14.023935] ? finish_task_switch.isra.0+0x153/0x700 [ 14.023957] ? __switch_to+0x47/0xf50 [ 14.023981] ? __schedule+0x10cc/0x2b60 [ 14.024002] ? __pfx_read_tsc+0x10/0x10 [ 14.024023] ? ktime_get_ts64+0x86/0x230 [ 14.024046] kunit_try_run_case+0x1a5/0x480 [ 14.024069] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.024092] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.024115] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.024138] ? __kthread_parkme+0x82/0x180 [ 14.024158] ? preempt_count_sub+0x50/0x80 [ 14.024182] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.024206] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.024229] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.024254] kthread+0x337/0x6f0 [ 14.024272] ? trace_preempt_on+0x20/0xc0 [ 14.024294] ? __pfx_kthread+0x10/0x10 [ 14.024314] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.024335] ? calculate_sigpending+0x7b/0xa0 [ 14.024359] ? __pfx_kthread+0x10/0x10 [ 14.024379] ret_from_fork+0x116/0x1d0 [ 14.024397] ? __pfx_kthread+0x10/0x10 [ 14.024417] ret_from_fork_asm+0x1a/0x30 [ 14.024446] </TASK> [ 14.024455] [ 14.031811] Allocated by task 277: [ 14.031974] kasan_save_stack+0x45/0x70 [ 14.032161] kasan_save_track+0x18/0x40 [ 14.032337] kasan_save_alloc_info+0x3b/0x50 [ 14.032486] __kasan_kmalloc+0xb7/0xc0 [ 14.032630] __kmalloc_cache_noprof+0x189/0x420 [ 14.032786] kasan_strings+0xc0/0xe80 [ 14.032916] kunit_try_run_case+0x1a5/0x480 [ 14.033062] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.033239] kthread+0x337/0x6f0 [ 14.033358] ret_from_fork+0x116/0x1d0 [ 14.033491] ret_from_fork_asm+0x1a/0x30 [ 14.033694] [ 14.033789] Freed by task 277: [ 14.033944] kasan_save_stack+0x45/0x70 [ 14.034142] kasan_save_track+0x18/0x40 [ 14.034554] kasan_save_free_info+0x3f/0x60 [ 14.034761] __kasan_slab_free+0x56/0x70 [ 14.034953] kfree+0x222/0x3f0 [ 14.035117] kasan_strings+0x2aa/0xe80 [ 14.035419] kunit_try_run_case+0x1a5/0x480 [ 14.035575] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.035749] kthread+0x337/0x6f0 [ 14.035866] ret_from_fork+0x116/0x1d0 [ 14.035997] ret_from_fork_asm+0x1a/0x30 [ 14.036133] [ 14.036203] The buggy address belongs to the object at ffff8881039fe2c0 [ 14.036203] which belongs to the cache kmalloc-32 of size 32 [ 14.036961] The buggy address is located 16 bytes inside of [ 14.036961] freed 32-byte region [ffff8881039fe2c0, ffff8881039fe2e0) [ 14.037924] [ 14.038020] The buggy address belongs to the physical page: [ 14.038415] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039fe [ 14.038736] flags: 0x200000000000000(node=0|zone=2) [ 14.038901] page_type: f5(slab) [ 14.039026] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.039263] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.039491] page dumped because: kasan: bad access detected [ 14.039913] [ 14.040002] Memory state around the buggy address: [ 14.040222] ffff8881039fe180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.040547] ffff8881039fe200: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 14.041135] >ffff8881039fe280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.041374] ^ [ 14.041564] ffff8881039fe300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.041782] ffff8881039fe380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.042101] ==================================================================