Date
June 3, 2025, 7:38 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.726443] ================================================================== [ 20.726495] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 20.726546] Read of size 1 at addr fff00000c58ba050 by task kunit_try_catch/259 [ 20.726597] [ 20.726627] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT [ 20.726713] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.726741] Hardware name: linux,dummy-virt (DT) [ 20.726772] Call trace: [ 20.726977] show_stack+0x20/0x38 (C) [ 20.727044] dump_stack_lvl+0x8c/0xd0 [ 20.727094] print_report+0x118/0x608 [ 20.727369] kasan_report+0xdc/0x128 [ 20.727492] __asan_report_load1_noabort+0x20/0x30 [ 20.727640] strnlen+0x80/0x88 [ 20.727732] kasan_strings+0x478/0xb00 [ 20.727861] kunit_try_run_case+0x170/0x3f0 [ 20.727970] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.728167] kthread+0x328/0x630 [ 20.728249] ret_from_fork+0x10/0x20 [ 20.728324] [ 20.728345] Allocated by task 259: [ 20.728376] kasan_save_stack+0x3c/0x68 [ 20.728420] kasan_save_track+0x20/0x40 [ 20.728471] kasan_save_alloc_info+0x40/0x58 [ 20.728510] __kasan_kmalloc+0xd4/0xd8 [ 20.728755] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.728899] kasan_strings+0xc8/0xb00 [ 20.728952] kunit_try_run_case+0x170/0x3f0 [ 20.729003] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.729049] kthread+0x328/0x630 [ 20.729094] ret_from_fork+0x10/0x20 [ 20.729142] [ 20.729172] Freed by task 259: [ 20.729203] kasan_save_stack+0x3c/0x68 [ 20.729242] kasan_save_track+0x20/0x40 [ 20.729285] kasan_save_free_info+0x4c/0x78 [ 20.729322] __kasan_slab_free+0x6c/0x98 [ 20.729371] kfree+0x214/0x3c8 [ 20.729431] kasan_strings+0x24c/0xb00 [ 20.729470] kunit_try_run_case+0x170/0x3f0 [ 20.729510] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.729557] kthread+0x328/0x630 [ 20.729592] ret_from_fork+0x10/0x20 [ 20.729636] [ 20.729659] The buggy address belongs to the object at fff00000c58ba040 [ 20.729659] which belongs to the cache kmalloc-32 of size 32 [ 20.729733] The buggy address is located 16 bytes inside of [ 20.729733] freed 32-byte region [fff00000c58ba040, fff00000c58ba060) [ 20.729812] [ 20.729842] The buggy address belongs to the physical page: [ 20.729875] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058ba [ 20.729944] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.730003] page_type: f5(slab) [ 20.730043] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.730105] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.730148] page dumped because: kasan: bad access detected [ 20.730180] [ 20.730227] Memory state around the buggy address: [ 20.730262] fff00000c58b9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 20.730307] fff00000c58b9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 20.730360] >fff00000c58ba000: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.730408] ^ [ 20.730929] fff00000c58ba080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.731186] fff00000c58ba100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.731319] ==================================================================
[ 16.906913] ================================================================== [ 16.907950] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 16.908343] Read of size 1 at addr ffff888103349910 by task kunit_try_catch/276 [ 16.908545] [ 16.908718] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.0-next-20250603 #1 PREEMPT(voluntary) [ 16.908775] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.908790] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 16.908814] Call Trace: [ 16.908923] <TASK> [ 16.908949] dump_stack_lvl+0x73/0xb0 [ 16.908982] print_report+0xd1/0x650 [ 16.909009] ? __virt_addr_valid+0x1db/0x2d0 [ 16.909036] ? strnlen+0x73/0x80 [ 16.909057] ? kasan_complete_mode_report_info+0x64/0x200 [ 16.909081] ? strnlen+0x73/0x80 [ 16.909102] kasan_report+0x141/0x180 [ 16.909126] ? strnlen+0x73/0x80 [ 16.909152] __asan_report_load1_noabort+0x18/0x20 [ 16.909175] strnlen+0x73/0x80 [ 16.909196] kasan_strings+0x615/0xe80 [ 16.909276] ? trace_hardirqs_on+0x37/0xe0 [ 16.909338] ? __pfx_kasan_strings+0x10/0x10 [ 16.909365] ? finish_task_switch.isra.0+0x153/0x700 [ 16.909396] ? __switch_to+0x47/0xf50 [ 16.909426] ? __schedule+0x10cc/0x2b60 [ 16.909465] ? __pfx_read_tsc+0x10/0x10 [ 16.909496] ? ktime_get_ts64+0x86/0x230 [ 16.909524] kunit_try_run_case+0x1a5/0x480 [ 16.909550] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.909599] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 16.909639] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 16.909667] ? __kthread_parkme+0x82/0x180 [ 16.909703] ? preempt_count_sub+0x50/0x80 [ 16.909732] ? __pfx_kunit_try_run_case+0x10/0x10 [ 16.909757] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.909783] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 16.909810] kthread+0x337/0x6f0 [ 16.909831] ? trace_preempt_on+0x20/0xc0 [ 16.909892] ? __pfx_kthread+0x10/0x10 [ 16.909917] ? _raw_spin_unlock_irq+0x47/0x80 [ 16.909944] ? calculate_sigpending+0x7b/0xa0 [ 16.909971] ? __pfx_kthread+0x10/0x10 [ 16.909994] ret_from_fork+0x116/0x1d0 [ 16.910016] ? __pfx_kthread+0x10/0x10 [ 16.910038] ret_from_fork_asm+0x1a/0x30 [ 16.910073] </TASK> [ 16.910087] [ 16.920681] Allocated by task 276: [ 16.921055] kasan_save_stack+0x45/0x70 [ 16.921375] kasan_save_track+0x18/0x40 [ 16.921668] kasan_save_alloc_info+0x3b/0x50 [ 16.922005] __kasan_kmalloc+0xb7/0xc0 [ 16.922276] __kmalloc_cache_noprof+0x189/0x420 [ 16.922530] kasan_strings+0xc0/0xe80 [ 16.922745] kunit_try_run_case+0x1a5/0x480 [ 16.923011] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.923365] kthread+0x337/0x6f0 [ 16.923591] ret_from_fork+0x116/0x1d0 [ 16.923942] ret_from_fork_asm+0x1a/0x30 [ 16.924198] [ 16.924337] Freed by task 276: [ 16.924544] kasan_save_stack+0x45/0x70 [ 16.924812] kasan_save_track+0x18/0x40 [ 16.925059] kasan_save_free_info+0x3f/0x60 [ 16.925320] __kasan_slab_free+0x56/0x70 [ 16.925601] kfree+0x222/0x3f0 [ 16.925885] kasan_strings+0x2aa/0xe80 [ 16.926071] kunit_try_run_case+0x1a5/0x480 [ 16.926403] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 16.926580] kthread+0x337/0x6f0 [ 16.926912] ret_from_fork+0x116/0x1d0 [ 16.927073] ret_from_fork_asm+0x1a/0x30 [ 16.927308] [ 16.927416] The buggy address belongs to the object at ffff888103349900 [ 16.927416] which belongs to the cache kmalloc-32 of size 32 [ 16.928046] The buggy address is located 16 bytes inside of [ 16.928046] freed 32-byte region [ffff888103349900, ffff888103349920) [ 16.928761] [ 16.928914] The buggy address belongs to the physical page: [ 16.929051] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103349 [ 16.929258] flags: 0x200000000000000(node=0|zone=2) [ 16.929398] page_type: f5(slab) [ 16.929644] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 16.930279] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 16.930492] page dumped because: kasan: bad access detected [ 16.930667] [ 16.930817] Memory state around the buggy address: [ 16.931165] ffff888103349800: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc [ 16.931696] ffff888103349880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 16.932024] >ffff888103349900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 16.932329] ^ [ 16.932631] ffff888103349980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 16.932995] ffff888103349a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 16.933487] ==================================================================