Date
July 9, 2025, 2:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.486907] ================================================================== [ 19.486964] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 19.487838] Read of size 1 at addr fff00000c7753290 by task kunit_try_catch/259 [ 19.487917] [ 19.488078] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5 #1 PREEMPT [ 19.488290] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 19.488327] Hardware name: linux,dummy-virt (DT) [ 19.488556] Call trace: [ 19.488735] show_stack+0x20/0x38 (C) [ 19.488905] dump_stack_lvl+0x8c/0xd0 [ 19.488989] print_report+0x118/0x608 [ 19.489042] kasan_report+0xdc/0x128 [ 19.489173] __asan_report_load1_noabort+0x20/0x30 [ 19.489231] strlen+0xa8/0xb0 [ 19.489294] kasan_strings+0x418/0xb00 [ 19.489484] kunit_try_run_case+0x170/0x3f0 [ 19.489553] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.489847] kthread+0x328/0x630 [ 19.490045] ret_from_fork+0x10/0x20 [ 19.490164] [ 19.490186] Allocated by task 259: [ 19.490218] kasan_save_stack+0x3c/0x68 [ 19.490261] kasan_save_track+0x20/0x40 [ 19.490568] kasan_save_alloc_info+0x40/0x58 [ 19.490749] __kasan_kmalloc+0xd4/0xd8 [ 19.490818] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.491028] kasan_strings+0xc8/0xb00 [ 19.491248] kunit_try_run_case+0x170/0x3f0 [ 19.491374] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.491529] kthread+0x328/0x630 [ 19.491792] ret_from_fork+0x10/0x20 [ 19.491921] [ 19.492061] Freed by task 259: [ 19.492224] kasan_save_stack+0x3c/0x68 [ 19.492302] kasan_save_track+0x20/0x40 [ 19.492365] kasan_save_free_info+0x4c/0x78 [ 19.492673] __kasan_slab_free+0x6c/0x98 [ 19.492719] kfree+0x214/0x3c8 [ 19.493058] kasan_strings+0x24c/0xb00 [ 19.493219] kunit_try_run_case+0x170/0x3f0 [ 19.493310] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.493462] kthread+0x328/0x630 [ 19.493540] ret_from_fork+0x10/0x20 [ 19.493976] [ 19.494028] The buggy address belongs to the object at fff00000c7753280 [ 19.494028] which belongs to the cache kmalloc-32 of size 32 [ 19.494708] The buggy address is located 16 bytes inside of [ 19.494708] freed 32-byte region [fff00000c7753280, fff00000c77532a0) [ 19.494818] [ 19.494862] The buggy address belongs to the physical page: [ 19.494929] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107753 [ 19.495421] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.495538] page_type: f5(slab) [ 19.495671] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.495753] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.495867] page dumped because: kasan: bad access detected [ 19.495938] [ 19.495959] Memory state around the buggy address: [ 19.496200] fff00000c7753180: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.496386] fff00000c7753200: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.497378] >fff00000c7753280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.497445] ^ [ 19.497612] fff00000c7753300: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.498275] fff00000c7753380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.498330] ==================================================================
[ 14.699195] ================================================================== [ 14.699617] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.699869] Read of size 1 at addr ffff8881029cc7d0 by task kunit_try_catch/276 [ 14.700108] [ 14.700223] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.700266] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.700278] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.700298] Call Trace: [ 14.700316] <TASK> [ 14.700334] dump_stack_lvl+0x73/0xb0 [ 14.700360] print_report+0xd1/0x650 [ 14.700381] ? __virt_addr_valid+0x1db/0x2d0 [ 14.700402] ? strlen+0x8f/0xb0 [ 14.700418] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.700439] ? strlen+0x8f/0xb0 [ 14.700456] kasan_report+0x141/0x180 [ 14.700477] ? strlen+0x8f/0xb0 [ 14.700497] __asan_report_load1_noabort+0x18/0x20 [ 14.700520] strlen+0x8f/0xb0 [ 14.700537] kasan_strings+0x57b/0xe80 [ 14.700556] ? trace_hardirqs_on+0x37/0xe0 [ 14.700578] ? __pfx_kasan_strings+0x10/0x10 [ 14.700951] ? finish_task_switch.isra.0+0x153/0x700 [ 14.700983] ? __switch_to+0x47/0xf50 [ 14.701010] ? __schedule+0x10cc/0x2b60 [ 14.701032] ? __pfx_read_tsc+0x10/0x10 [ 14.701054] ? ktime_get_ts64+0x86/0x230 [ 14.701078] kunit_try_run_case+0x1a5/0x480 [ 14.701102] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.701125] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.701149] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.701183] ? __kthread_parkme+0x82/0x180 [ 14.701203] ? preempt_count_sub+0x50/0x80 [ 14.701225] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.701261] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.701285] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.701310] kthread+0x337/0x6f0 [ 14.701329] ? trace_preempt_on+0x20/0xc0 [ 14.701351] ? __pfx_kthread+0x10/0x10 [ 14.701372] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.701393] ? calculate_sigpending+0x7b/0xa0 [ 14.701418] ? __pfx_kthread+0x10/0x10 [ 14.701439] ret_from_fork+0x116/0x1d0 [ 14.701457] ? __pfx_kthread+0x10/0x10 [ 14.701477] ret_from_fork_asm+0x1a/0x30 [ 14.701508] </TASK> [ 14.701518] [ 14.708878] Allocated by task 276: [ 14.709095] kasan_save_stack+0x45/0x70 [ 14.709330] kasan_save_track+0x18/0x40 [ 14.709518] kasan_save_alloc_info+0x3b/0x50 [ 14.709709] __kasan_kmalloc+0xb7/0xc0 [ 14.709948] __kmalloc_cache_noprof+0x189/0x420 [ 14.710173] kasan_strings+0xc0/0xe80 [ 14.710359] kunit_try_run_case+0x1a5/0x480 [ 14.710572] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.710871] kthread+0x337/0x6f0 [ 14.711050] ret_from_fork+0x116/0x1d0 [ 14.711236] ret_from_fork_asm+0x1a/0x30 [ 14.711405] [ 14.711516] Freed by task 276: [ 14.711673] kasan_save_stack+0x45/0x70 [ 14.711897] kasan_save_track+0x18/0x40 [ 14.712081] kasan_save_free_info+0x3f/0x60 [ 14.712246] __kasan_slab_free+0x56/0x70 [ 14.712441] kfree+0x222/0x3f0 [ 14.712616] kasan_strings+0x2aa/0xe80 [ 14.712798] kunit_try_run_case+0x1a5/0x480 [ 14.712943] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.713118] kthread+0x337/0x6f0 [ 14.713239] ret_from_fork+0x116/0x1d0 [ 14.713370] ret_from_fork_asm+0x1a/0x30 [ 14.713577] [ 14.713686] The buggy address belongs to the object at ffff8881029cc7c0 [ 14.713686] which belongs to the cache kmalloc-32 of size 32 [ 14.714240] The buggy address is located 16 bytes inside of [ 14.714240] freed 32-byte region [ffff8881029cc7c0, ffff8881029cc7e0) [ 14.714793] [ 14.714911] The buggy address belongs to the physical page: [ 14.715152] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029cc [ 14.715394] flags: 0x200000000000000(node=0|zone=2) [ 14.715558] page_type: f5(slab) [ 14.715688] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.715947] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.716314] page dumped because: kasan: bad access detected [ 14.716602] [ 14.716700] Memory state around the buggy address: [ 14.716987] ffff8881029cc680: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.717329] ffff8881029cc700: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 14.717659] >ffff8881029cc780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.718008] ^ [ 14.718275] ffff8881029cc800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.718577] ffff8881029cc880: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.718879] ==================================================================