Date
July 23, 2025, 2:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.723536] ================================================================== [ 17.723984] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 17.724066] Read of size 1 at addr fff00000c3f8c510 by task kunit_try_catch/259 [ 17.724131] [ 17.724178] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT [ 17.724265] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.724297] Hardware name: linux,dummy-virt (DT) [ 17.724331] Call trace: [ 17.724361] show_stack+0x20/0x38 (C) [ 17.724415] dump_stack_lvl+0x8c/0xd0 [ 17.724464] print_report+0x118/0x5d0 [ 17.724514] kasan_report+0xdc/0x128 [ 17.724561] __asan_report_load1_noabort+0x20/0x30 [ 17.724616] strlen+0xa8/0xb0 [ 17.724658] kasan_strings+0x418/0xb00 [ 17.724711] kunit_try_run_case+0x170/0x3f0 [ 17.724770] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.724828] kthread+0x328/0x630 [ 17.725974] ret_from_fork+0x10/0x20 [ 17.726048] [ 17.726076] Allocated by task 259: [ 17.726291] kasan_save_stack+0x3c/0x68 [ 17.726586] kasan_save_track+0x20/0x40 [ 17.726703] kasan_save_alloc_info+0x40/0x58 [ 17.726755] __kasan_kmalloc+0xd4/0xd8 [ 17.727079] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.727171] kasan_strings+0xc8/0xb00 [ 17.727267] kunit_try_run_case+0x170/0x3f0 [ 17.727333] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.727668] kthread+0x328/0x630 [ 17.727825] ret_from_fork+0x10/0x20 [ 17.727994] [ 17.728028] Freed by task 259: [ 17.728058] kasan_save_stack+0x3c/0x68 [ 17.728128] kasan_save_track+0x20/0x40 [ 17.728490] kasan_save_free_info+0x4c/0x78 [ 17.728863] __kasan_slab_free+0x6c/0x98 [ 17.729010] kfree+0x214/0x3c8 [ 17.729104] kasan_strings+0x24c/0xb00 [ 17.729486] kunit_try_run_case+0x170/0x3f0 [ 17.729678] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.729788] kthread+0x328/0x630 [ 17.729928] ret_from_fork+0x10/0x20 [ 17.730078] [ 17.730139] The buggy address belongs to the object at fff00000c3f8c500 [ 17.730139] which belongs to the cache kmalloc-32 of size 32 [ 17.730366] The buggy address is located 16 bytes inside of [ 17.730366] freed 32-byte region [fff00000c3f8c500, fff00000c3f8c520) [ 17.730604] [ 17.730661] The buggy address belongs to the physical page: [ 17.730720] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f8c [ 17.730781] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.731264] page_type: f5(slab) [ 17.731329] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.731442] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.731557] page dumped because: kasan: bad access detected [ 17.731804] [ 17.731878] Memory state around the buggy address: [ 17.732091] fff00000c3f8c400: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.732146] fff00000c3f8c480: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.732258] >fff00000c3f8c500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.732302] ^ [ 17.732384] fff00000c3f8c580: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.732694] fff00000c3f8c600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.733043] ==================================================================
[ 14.530099] ================================================================== [ 14.530450] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.530709] Read of size 1 at addr ffff8881025e0a90 by task kunit_try_catch/276 [ 14.531038] [ 14.531493] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7 #1 PREEMPT(voluntary) [ 14.531541] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.531554] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.531575] Call Trace: [ 14.531737] <TASK> [ 14.531754] dump_stack_lvl+0x73/0xb0 [ 14.531783] print_report+0xd1/0x610 [ 14.531806] ? __virt_addr_valid+0x1db/0x2d0 [ 14.531841] ? strlen+0x8f/0xb0 [ 14.531858] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.531881] ? strlen+0x8f/0xb0 [ 14.531898] kasan_report+0x141/0x180 [ 14.531920] ? strlen+0x8f/0xb0 [ 14.531942] __asan_report_load1_noabort+0x18/0x20 [ 14.531966] strlen+0x8f/0xb0 [ 14.531984] kasan_strings+0x57b/0xe80 [ 14.532005] ? trace_hardirqs_on+0x37/0xe0 [ 14.532027] ? __pfx_kasan_strings+0x10/0x10 [ 14.532047] ? finish_task_switch.isra.0+0x153/0x700 [ 14.532069] ? __switch_to+0x47/0xf50 [ 14.532103] ? __schedule+0x10c6/0x2b60 [ 14.532125] ? __pfx_read_tsc+0x10/0x10 [ 14.532146] ? ktime_get_ts64+0x86/0x230 [ 14.532169] kunit_try_run_case+0x1a5/0x480 [ 14.532195] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.532220] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.532246] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.532269] ? __kthread_parkme+0x82/0x180 [ 14.532291] ? preempt_count_sub+0x50/0x80 [ 14.532313] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.532338] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.532361] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.532384] kthread+0x337/0x6f0 [ 14.532404] ? trace_preempt_on+0x20/0xc0 [ 14.532426] ? __pfx_kthread+0x10/0x10 [ 14.532448] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.532469] ? calculate_sigpending+0x7b/0xa0 [ 14.532492] ? __pfx_kthread+0x10/0x10 [ 14.532512] ret_from_fork+0x116/0x1d0 [ 14.532531] ? __pfx_kthread+0x10/0x10 [ 14.532551] ret_from_fork_asm+0x1a/0x30 [ 14.532580] </TASK> [ 14.532591] [ 14.541956] Allocated by task 276: [ 14.542095] kasan_save_stack+0x45/0x70 [ 14.542717] kasan_save_track+0x18/0x40 [ 14.542908] kasan_save_alloc_info+0x3b/0x50 [ 14.543130] __kasan_kmalloc+0xb7/0xc0 [ 14.543398] __kmalloc_cache_noprof+0x189/0x420 [ 14.543778] kasan_strings+0xc0/0xe80 [ 14.543932] kunit_try_run_case+0x1a5/0x480 [ 14.544261] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.544460] kthread+0x337/0x6f0 [ 14.544737] ret_from_fork+0x116/0x1d0 [ 14.544912] ret_from_fork_asm+0x1a/0x30 [ 14.545213] [ 14.545311] Freed by task 276: [ 14.545647] kasan_save_stack+0x45/0x70 [ 14.545850] kasan_save_track+0x18/0x40 [ 14.546024] kasan_save_free_info+0x3f/0x60 [ 14.546441] __kasan_slab_free+0x56/0x70 [ 14.546625] kfree+0x222/0x3f0 [ 14.546899] kasan_strings+0x2aa/0xe80 [ 14.547056] kunit_try_run_case+0x1a5/0x480 [ 14.547296] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.547520] kthread+0x337/0x6f0 [ 14.547684] ret_from_fork+0x116/0x1d0 [ 14.547872] ret_from_fork_asm+0x1a/0x30 [ 14.548055] [ 14.548137] The buggy address belongs to the object at ffff8881025e0a80 [ 14.548137] which belongs to the cache kmalloc-32 of size 32 [ 14.548619] The buggy address is located 16 bytes inside of [ 14.548619] freed 32-byte region [ffff8881025e0a80, ffff8881025e0aa0) [ 14.549620] [ 14.549795] The buggy address belongs to the physical page: [ 14.550195] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025e0 [ 14.550580] flags: 0x200000000000000(node=0|zone=2) [ 14.550882] page_type: f5(slab) [ 14.551010] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.551623] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.551965] page dumped because: kasan: bad access detected [ 14.552219] [ 14.552375] Memory state around the buggy address: [ 14.552690] ffff8881025e0980: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.553026] ffff8881025e0a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.553544] >ffff8881025e0a80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.553896] ^ [ 14.554082] ffff8881025e0b00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.554640] ffff8881025e0b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.555378] ==================================================================