Date
July 15, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.129168] ================================================================== [ 20.129237] BUG: KASAN: slab-use-after-free in kasan_strings+0x95c/0xb00 [ 20.129296] Read of size 1 at addr fff00000c59caad0 by task kunit_try_catch/261 [ 20.129538] [ 20.129576] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT [ 20.129869] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.129983] Hardware name: linux,dummy-virt (DT) [ 20.130029] Call trace: [ 20.130071] show_stack+0x20/0x38 (C) [ 20.130182] dump_stack_lvl+0x8c/0xd0 [ 20.130279] print_report+0x118/0x5d0 [ 20.130423] kasan_report+0xdc/0x128 [ 20.130489] __asan_report_load1_noabort+0x20/0x30 [ 20.130569] kasan_strings+0x95c/0xb00 [ 20.130953] kunit_try_run_case+0x170/0x3f0 [ 20.131068] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.131164] kthread+0x328/0x630 [ 20.131332] ret_from_fork+0x10/0x20 [ 20.131442] [ 20.131601] Allocated by task 261: [ 20.131633] kasan_save_stack+0x3c/0x68 [ 20.131705] kasan_save_track+0x20/0x40 [ 20.132050] kasan_save_alloc_info+0x40/0x58 [ 20.132121] __kasan_kmalloc+0xd4/0xd8 [ 20.132249] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.132326] kasan_strings+0xc8/0xb00 [ 20.132384] kunit_try_run_case+0x170/0x3f0 [ 20.132685] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.132771] kthread+0x328/0x630 [ 20.133097] ret_from_fork+0x10/0x20 [ 20.133173] [ 20.133396] Freed by task 261: [ 20.133541] kasan_save_stack+0x3c/0x68 [ 20.133614] kasan_save_track+0x20/0x40 [ 20.133715] kasan_save_free_info+0x4c/0x78 [ 20.133774] __kasan_slab_free+0x6c/0x98 [ 20.133814] kfree+0x214/0x3c8 [ 20.133849] kasan_strings+0x24c/0xb00 [ 20.133889] kunit_try_run_case+0x170/0x3f0 [ 20.133930] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.133978] kthread+0x328/0x630 [ 20.134016] ret_from_fork+0x10/0x20 [ 20.134234] [ 20.134390] The buggy address belongs to the object at fff00000c59caac0 [ 20.134390] which belongs to the cache kmalloc-32 of size 32 [ 20.134543] The buggy address is located 16 bytes inside of [ 20.134543] freed 32-byte region [fff00000c59caac0, fff00000c59caae0) [ 20.134637] [ 20.134734] The buggy address belongs to the physical page: [ 20.134804] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1059ca [ 20.134968] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.135058] page_type: f5(slab) [ 20.135100] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.135167] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.135367] page dumped because: kasan: bad access detected [ 20.135622] [ 20.135692] Memory state around the buggy address: [ 20.135759] fff00000c59ca980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.135914] fff00000c59caa00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 20.135981] >fff00000c59caa80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.136024] ^ [ 20.136073] fff00000c59cab00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.136489] fff00000c59cab80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.136551] ==================================================================
[ 12.931084] ================================================================== [ 12.931401] BUG: KASAN: slab-use-after-free in kasan_strings+0xcbc/0xe80 [ 12.931816] Read of size 1 at addr ffff8881022482d0 by task kunit_try_catch/278 [ 12.932364] [ 12.932497] CPU: 0 UID: 0 PID: 278 Comm: kunit_try_catch Tainted: G B N 6.15.7-rc1 #1 PREEMPT(voluntary) [ 12.932557] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.932568] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.932588] Call Trace: [ 12.932602] <TASK> [ 12.932617] dump_stack_lvl+0x73/0xb0 [ 12.932643] print_report+0xd1/0x610 [ 12.932664] ? __virt_addr_valid+0x1db/0x2d0 [ 12.932731] ? kasan_strings+0xcbc/0xe80 [ 12.932754] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.932778] ? kasan_strings+0xcbc/0xe80 [ 12.932799] kasan_report+0x141/0x180 [ 12.932822] ? kasan_strings+0xcbc/0xe80 [ 12.932847] __asan_report_load1_noabort+0x18/0x20 [ 12.932868] kasan_strings+0xcbc/0xe80 [ 12.932899] ? trace_hardirqs_on+0x37/0xe0 [ 12.932921] ? __pfx_kasan_strings+0x10/0x10 [ 12.932941] ? finish_task_switch.isra.0+0x153/0x700 [ 12.932963] ? __switch_to+0x5d9/0xf60 [ 12.932982] ? dequeue_task_fair+0x166/0x4e0 [ 12.933005] ? __schedule+0x10cc/0x2b60 [ 12.933027] ? __pfx_read_tsc+0x10/0x10 [ 12.933046] ? ktime_get_ts64+0x86/0x230 [ 12.933070] kunit_try_run_case+0x1a5/0x480 [ 12.933090] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.933108] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.933134] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.933158] ? __kthread_parkme+0x82/0x180 [ 12.933179] ? preempt_count_sub+0x50/0x80 [ 12.933203] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.933225] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.933248] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.933270] kthread+0x337/0x6f0 [ 12.933286] ? trace_preempt_on+0x20/0xc0 [ 12.933307] ? __pfx_kthread+0x10/0x10 [ 12.933325] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.933346] ? calculate_sigpending+0x7b/0xa0 [ 12.933367] ? __pfx_kthread+0x10/0x10 [ 12.933384] ret_from_fork+0x41/0x80 [ 12.933404] ? __pfx_kthread+0x10/0x10 [ 12.933420] ret_from_fork_asm+0x1a/0x30 [ 12.933450] </TASK> [ 12.933460] [ 12.941995] Allocated by task 278: [ 12.942120] kasan_save_stack+0x45/0x70 [ 12.942319] kasan_save_track+0x18/0x40 [ 12.942536] kasan_save_alloc_info+0x3b/0x50 [ 12.942776] __kasan_kmalloc+0xb7/0xc0 [ 12.943051] __kmalloc_cache_noprof+0x189/0x420 [ 12.943266] kasan_strings+0xc0/0xe80 [ 12.943393] kunit_try_run_case+0x1a5/0x480 [ 12.943612] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.944110] kthread+0x337/0x6f0 [ 12.944278] ret_from_fork+0x41/0x80 [ 12.944446] ret_from_fork_asm+0x1a/0x30 [ 12.944590] [ 12.944668] Freed by task 278: [ 12.944836] kasan_save_stack+0x45/0x70 [ 12.944980] kasan_save_track+0x18/0x40 [ 12.945108] kasan_save_free_info+0x3f/0x60 [ 12.945250] __kasan_slab_free+0x56/0x70 [ 12.945460] kfree+0x222/0x3f0 [ 12.945617] kasan_strings+0x2aa/0xe80 [ 12.945801] kunit_try_run_case+0x1a5/0x480 [ 12.946024] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.946273] kthread+0x337/0x6f0 [ 12.946431] ret_from_fork+0x41/0x80 [ 12.946557] ret_from_fork_asm+0x1a/0x30 [ 12.946692] [ 12.946761] The buggy address belongs to the object at ffff8881022482c0 [ 12.946761] which belongs to the cache kmalloc-32 of size 32 [ 12.947413] The buggy address is located 16 bytes inside of [ 12.947413] freed 32-byte region [ffff8881022482c0, ffff8881022482e0) [ 12.947784] [ 12.947854] The buggy address belongs to the physical page: [ 12.948070] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102248 [ 12.948468] flags: 0x200000000000000(node=0|zone=2) [ 12.948731] page_type: f5(slab) [ 12.948993] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.949302] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.949550] page dumped because: kasan: bad access detected [ 12.949811] [ 12.949986] Memory state around the buggy address: [ 12.950211] ffff888102248180: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 12.950542] ffff888102248200: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 12.950997] >ffff888102248280: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 12.951216] ^ [ 12.951397] ffff888102248300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.951647] ffff888102248380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 12.952319] ==================================================================