Date
July 5, 2025, 11:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.449789] ================================================================== [ 20.449848] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 20.449901] Read of size 1 at addr fff00000c78cc650 by task kunit_try_catch/259 [ 20.449953] [ 20.450137] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 20.450283] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.450312] Hardware name: linux,dummy-virt (DT) [ 20.450729] Call trace: [ 20.450848] show_stack+0x20/0x38 (C) [ 20.450904] dump_stack_lvl+0x8c/0xd0 [ 20.450950] print_report+0x118/0x608 [ 20.451561] kasan_report+0xdc/0x128 [ 20.451809] __asan_report_load1_noabort+0x20/0x30 [ 20.451940] strcmp+0xc0/0xc8 [ 20.451987] kasan_strings+0x340/0xb00 [ 20.452465] kunit_try_run_case+0x170/0x3f0 [ 20.452532] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.452589] kthread+0x328/0x630 [ 20.452646] ret_from_fork+0x10/0x20 [ 20.452812] [ 20.452844] Allocated by task 259: [ 20.453190] kasan_save_stack+0x3c/0x68 [ 20.453296] kasan_save_track+0x20/0x40 [ 20.453337] kasan_save_alloc_info+0x40/0x58 [ 20.453378] __kasan_kmalloc+0xd4/0xd8 [ 20.453423] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.453464] kasan_strings+0xc8/0xb00 [ 20.453616] kunit_try_run_case+0x170/0x3f0 [ 20.453805] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.453938] kthread+0x328/0x630 [ 20.454012] ret_from_fork+0x10/0x20 [ 20.454094] [ 20.454141] Freed by task 259: [ 20.454206] kasan_save_stack+0x3c/0x68 [ 20.454331] kasan_save_track+0x20/0x40 [ 20.454405] kasan_save_free_info+0x4c/0x78 [ 20.454452] __kasan_slab_free+0x6c/0x98 [ 20.454490] kfree+0x214/0x3c8 [ 20.454526] kasan_strings+0x24c/0xb00 [ 20.454565] kunit_try_run_case+0x170/0x3f0 [ 20.454644] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.454871] kthread+0x328/0x630 [ 20.454908] ret_from_fork+0x10/0x20 [ 20.454947] [ 20.454969] The buggy address belongs to the object at fff00000c78cc640 [ 20.454969] which belongs to the cache kmalloc-32 of size 32 [ 20.455068] The buggy address is located 16 bytes inside of [ 20.455068] freed 32-byte region [fff00000c78cc640, fff00000c78cc660) [ 20.455165] [ 20.455188] The buggy address belongs to the physical page: [ 20.455220] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1078cc [ 20.455343] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.456130] page_type: f5(slab) [ 20.456308] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.456588] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.456664] page dumped because: kasan: bad access detected [ 20.456743] [ 20.456770] Memory state around the buggy address: [ 20.456814] fff00000c78cc500: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.456881] fff00000c78cc580: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 20.456926] >fff00000c78cc600: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.456966] ^ [ 20.457002] fff00000c78cc680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.457711] fff00000c78cc700: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.457778] ==================================================================
[ 15.713324] ================================================================== [ 15.714408] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 15.714745] Read of size 1 at addr ffff888102a0d790 by task kunit_try_catch/277 [ 15.715231] [ 15.715362] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 15.715420] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.715434] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 15.715461] Call Trace: [ 15.715477] <TASK> [ 15.715499] dump_stack_lvl+0x73/0xb0 [ 15.715536] print_report+0xd1/0x650 [ 15.715566] ? __virt_addr_valid+0x1db/0x2d0 [ 15.715595] ? strcmp+0xb0/0xc0 [ 15.715619] ? kasan_complete_mode_report_info+0x64/0x200 [ 15.715646] ? strcmp+0xb0/0xc0 [ 15.715671] kasan_report+0x141/0x180 [ 15.715697] ? strcmp+0xb0/0xc0 [ 15.715727] __asan_report_load1_noabort+0x18/0x20 [ 15.715755] strcmp+0xb0/0xc0 [ 15.715782] kasan_strings+0x431/0xe80 [ 15.715821] ? trace_hardirqs_on+0x37/0xe0 [ 15.715849] ? __pfx_kasan_strings+0x10/0x10 [ 15.715874] ? finish_task_switch.isra.0+0x153/0x700 [ 15.715900] ? __switch_to+0x47/0xf50 [ 15.715929] ? __schedule+0x10cc/0x2b60 [ 15.715955] ? __pfx_read_tsc+0x10/0x10 [ 15.715980] ? ktime_get_ts64+0x86/0x230 [ 15.716008] kunit_try_run_case+0x1a5/0x480 [ 15.716038] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.716063] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 15.716091] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 15.716119] ? __kthread_parkme+0x82/0x180 [ 15.716212] ? preempt_count_sub+0x50/0x80 [ 15.716244] ? __pfx_kunit_try_run_case+0x10/0x10 [ 15.716272] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.716299] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 15.716326] kthread+0x337/0x6f0 [ 15.716350] ? trace_preempt_on+0x20/0xc0 [ 15.716377] ? __pfx_kthread+0x10/0x10 [ 15.716401] ? _raw_spin_unlock_irq+0x47/0x80 [ 15.716428] ? calculate_sigpending+0x7b/0xa0 [ 15.716456] ? __pfx_kthread+0x10/0x10 [ 15.716481] ret_from_fork+0x116/0x1d0 [ 15.716505] ? __pfx_kthread+0x10/0x10 [ 15.716529] ret_from_fork_asm+0x1a/0x30 [ 15.716565] </TASK> [ 15.716580] [ 15.727298] Allocated by task 277: [ 15.727523] kasan_save_stack+0x45/0x70 [ 15.727756] kasan_save_track+0x18/0x40 [ 15.727932] kasan_save_alloc_info+0x3b/0x50 [ 15.728136] __kasan_kmalloc+0xb7/0xc0 [ 15.728368] __kmalloc_cache_noprof+0x189/0x420 [ 15.728625] kasan_strings+0xc0/0xe80 [ 15.728829] kunit_try_run_case+0x1a5/0x480 [ 15.729018] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.729271] kthread+0x337/0x6f0 [ 15.729479] ret_from_fork+0x116/0x1d0 [ 15.729782] ret_from_fork_asm+0x1a/0x30 [ 15.729965] [ 15.730049] Freed by task 277: [ 15.730219] kasan_save_stack+0x45/0x70 [ 15.730529] kasan_save_track+0x18/0x40 [ 15.730741] kasan_save_free_info+0x3f/0x60 [ 15.730968] __kasan_slab_free+0x56/0x70 [ 15.731276] kfree+0x222/0x3f0 [ 15.731478] kasan_strings+0x2aa/0xe80 [ 15.731674] kunit_try_run_case+0x1a5/0x480 [ 15.731920] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 15.732337] kthread+0x337/0x6f0 [ 15.732503] ret_from_fork+0x116/0x1d0 [ 15.732725] ret_from_fork_asm+0x1a/0x30 [ 15.732943] [ 15.733047] The buggy address belongs to the object at ffff888102a0d780 [ 15.733047] which belongs to the cache kmalloc-32 of size 32 [ 15.733461] The buggy address is located 16 bytes inside of [ 15.733461] freed 32-byte region [ffff888102a0d780, ffff888102a0d7a0) [ 15.734145] [ 15.734267] The buggy address belongs to the physical page: [ 15.734481] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a0d [ 15.734760] flags: 0x200000000000000(node=0|zone=2) [ 15.735048] page_type: f5(slab) [ 15.735375] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 15.735780] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 15.736276] page dumped because: kasan: bad access detected [ 15.736485] [ 15.736567] Memory state around the buggy address: [ 15.736798] ffff888102a0d680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 15.737167] ffff888102a0d700: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 15.737606] >ffff888102a0d780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 15.737859] ^ [ 15.738356] ffff888102a0d800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 15.739298] ffff888102a0d880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 15.739567] ==================================================================