Date
July 10, 2025, 6:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.157975] ================================================================== [ 19.158349] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 19.158818] Read of size 1 at addr fff00000c5a4d450 by task kunit_try_catch/259 [ 19.158981] [ 19.159077] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.159250] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.159330] Hardware name: linux,dummy-virt (DT) [ 19.159377] Call trace: [ 19.159707] show_stack+0x20/0x38 (C) [ 19.159880] dump_stack_lvl+0x8c/0xd0 [ 19.160006] print_report+0x118/0x608 [ 19.160138] kasan_report+0xdc/0x128 [ 19.160317] __asan_report_load1_noabort+0x20/0x30 [ 19.160633] strcmp+0xc0/0xc8 [ 19.160781] kasan_strings+0x340/0xb00 [ 19.160939] kunit_try_run_case+0x170/0x3f0 [ 19.161092] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.161276] kthread+0x328/0x630 [ 19.161595] ret_from_fork+0x10/0x20 [ 19.161839] [ 19.161963] Allocated by task 259: [ 19.162042] kasan_save_stack+0x3c/0x68 [ 19.162130] kasan_save_track+0x20/0x40 [ 19.162254] kasan_save_alloc_info+0x40/0x58 [ 19.162360] __kasan_kmalloc+0xd4/0xd8 [ 19.162404] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.162759] kasan_strings+0xc8/0xb00 [ 19.162895] kunit_try_run_case+0x170/0x3f0 [ 19.163055] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.163183] kthread+0x328/0x630 [ 19.163393] ret_from_fork+0x10/0x20 [ 19.163457] [ 19.163973] Freed by task 259: [ 19.164024] kasan_save_stack+0x3c/0x68 [ 19.164348] kasan_save_track+0x20/0x40 [ 19.164595] kasan_save_free_info+0x4c/0x78 [ 19.164741] __kasan_slab_free+0x6c/0x98 [ 19.164890] kfree+0x214/0x3c8 [ 19.165046] kasan_strings+0x24c/0xb00 [ 19.165211] kunit_try_run_case+0x170/0x3f0 [ 19.165425] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.165557] kthread+0x328/0x630 [ 19.165644] ret_from_fork+0x10/0x20 [ 19.165799] [ 19.165864] The buggy address belongs to the object at fff00000c5a4d440 [ 19.165864] which belongs to the cache kmalloc-32 of size 32 [ 19.166104] The buggy address is located 16 bytes inside of [ 19.166104] freed 32-byte region [fff00000c5a4d440, fff00000c5a4d460) [ 19.166332] [ 19.166404] The buggy address belongs to the physical page: [ 19.166573] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a4d [ 19.166743] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.166855] page_type: f5(slab) [ 19.166976] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.167051] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.167420] page dumped because: kasan: bad access detected [ 19.167465] [ 19.167738] Memory state around the buggy address: [ 19.167849] fff00000c5a4d300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.167975] fff00000c5a4d380: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.168155] >fff00000c5a4d400: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.168244] ^ [ 19.168328] fff00000c5a4d480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.168677] fff00000c5a4d500: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.168808] ==================================================================
[ 14.398406] ================================================================== [ 14.399492] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.399749] Read of size 1 at addr ffff8881027b2750 by task kunit_try_catch/276 [ 14.400060] [ 14.400200] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.400245] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.400256] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.400277] Call Trace: [ 14.400290] <TASK> [ 14.400307] dump_stack_lvl+0x73/0xb0 [ 14.400335] print_report+0xd1/0x650 [ 14.400359] ? __virt_addr_valid+0x1db/0x2d0 [ 14.400383] ? strcmp+0xb0/0xc0 [ 14.400399] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.400423] ? strcmp+0xb0/0xc0 [ 14.400440] kasan_report+0x141/0x180 [ 14.400462] ? strcmp+0xb0/0xc0 [ 14.400560] __asan_report_load1_noabort+0x18/0x20 [ 14.400589] strcmp+0xb0/0xc0 [ 14.400608] kasan_strings+0x431/0xe80 [ 14.400628] ? trace_hardirqs_on+0x37/0xe0 [ 14.400652] ? __pfx_kasan_strings+0x10/0x10 [ 14.400675] ? __kasan_check_write+0x18/0x20 [ 14.400694] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.400720] ? irqentry_exit+0x2a/0x60 [ 14.400743] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 14.400768] ? trace_hardirqs_on+0x37/0xe0 [ 14.400790] ? __pfx_read_tsc+0x10/0x10 [ 14.400812] ? ktime_get_ts64+0x86/0x230 [ 14.400858] kunit_try_run_case+0x1a5/0x480 [ 14.400884] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.400910] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.400934] ? __kthread_parkme+0x82/0x180 [ 14.401001] ? preempt_count_sub+0x50/0x80 [ 14.401026] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.401061] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.401086] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.401112] kthread+0x337/0x6f0 [ 14.401130] ? trace_preempt_on+0x20/0xc0 [ 14.401153] ? __pfx_kthread+0x10/0x10 [ 14.401173] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.401194] ? calculate_sigpending+0x7b/0xa0 [ 14.401218] ? __pfx_kthread+0x10/0x10 [ 14.401239] ret_from_fork+0x116/0x1d0 [ 14.401257] ? __pfx_kthread+0x10/0x10 [ 14.401278] ret_from_fork_asm+0x1a/0x30 [ 14.401309] </TASK> [ 14.401319] [ 14.411679] Allocated by task 276: [ 14.412060] kasan_save_stack+0x45/0x70 [ 14.412264] kasan_save_track+0x18/0x40 [ 14.412441] kasan_save_alloc_info+0x3b/0x50 [ 14.412634] __kasan_kmalloc+0xb7/0xc0 [ 14.412853] __kmalloc_cache_noprof+0x189/0x420 [ 14.413845] kasan_strings+0xc0/0xe80 [ 14.414001] kunit_try_run_case+0x1a5/0x480 [ 14.414156] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.414325] kthread+0x337/0x6f0 [ 14.414442] ret_from_fork+0x116/0x1d0 [ 14.414631] ret_from_fork_asm+0x1a/0x30 [ 14.414812] [ 14.414902] Freed by task 276: [ 14.415110] kasan_save_stack+0x45/0x70 [ 14.415288] kasan_save_track+0x18/0x40 [ 14.415460] kasan_save_free_info+0x3f/0x60 [ 14.415643] __kasan_slab_free+0x56/0x70 [ 14.416370] kfree+0x222/0x3f0 [ 14.416539] kasan_strings+0x2aa/0xe80 [ 14.416676] kunit_try_run_case+0x1a5/0x480 [ 14.416824] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.417363] kthread+0x337/0x6f0 [ 14.417991] ret_from_fork+0x116/0x1d0 [ 14.418432] ret_from_fork_asm+0x1a/0x30 [ 14.418705] [ 14.418863] The buggy address belongs to the object at ffff8881027b2740 [ 14.418863] which belongs to the cache kmalloc-32 of size 32 [ 14.419859] The buggy address is located 16 bytes inside of [ 14.419859] freed 32-byte region [ffff8881027b2740, ffff8881027b2760) [ 14.420373] [ 14.420468] The buggy address belongs to the physical page: [ 14.420708] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027b2 [ 14.421337] flags: 0x200000000000000(node=0|zone=2) [ 14.421553] page_type: f5(slab) [ 14.421710] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.423042] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.423351] page dumped because: kasan: bad access detected [ 14.423658] [ 14.424122] Memory state around the buggy address: [ 14.424339] ffff8881027b2600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.424633] ffff8881027b2680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.425304] >ffff8881027b2700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.425858] ^ [ 14.426271] ffff8881027b2780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.426559] ffff8881027b2800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.427292] ==================================================================