Date
July 3, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.129738] ================================================================== [ 20.130074] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 20.130276] Read of size 8 at addr fff00000c6674300 by task kunit_try_catch/200 [ 20.130375] [ 20.130655] CPU: 0 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 20.130837] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.130895] Hardware name: linux,dummy-virt (DT) [ 20.130963] Call trace: [ 20.131251] show_stack+0x20/0x38 (C) [ 20.131446] dump_stack_lvl+0x8c/0xd0 [ 20.131566] print_report+0x118/0x608 [ 20.131745] kasan_report+0xdc/0x128 [ 20.131853] __asan_report_load8_noabort+0x20/0x30 [ 20.132171] workqueue_uaf+0x480/0x4a8 [ 20.132279] kunit_try_run_case+0x170/0x3f0 [ 20.132389] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.132519] kthread+0x328/0x630 [ 20.132812] ret_from_fork+0x10/0x20 [ 20.132919] [ 20.133414] Allocated by task 200: [ 20.133506] kasan_save_stack+0x3c/0x68 [ 20.133669] kasan_save_track+0x20/0x40 [ 20.133761] kasan_save_alloc_info+0x40/0x58 [ 20.133850] __kasan_kmalloc+0xd4/0xd8 [ 20.134140] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.134463] workqueue_uaf+0x13c/0x4a8 [ 20.134543] kunit_try_run_case+0x170/0x3f0 [ 20.134652] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.134751] kthread+0x328/0x630 [ 20.134898] ret_from_fork+0x10/0x20 [ 20.134989] [ 20.135048] Freed by task 75: [ 20.135197] kasan_save_stack+0x3c/0x68 [ 20.135364] kasan_save_track+0x20/0x40 [ 20.135444] kasan_save_free_info+0x4c/0x78 [ 20.135544] __kasan_slab_free+0x6c/0x98 [ 20.135627] kfree+0x214/0x3c8 [ 20.135932] workqueue_uaf_work+0x18/0x30 [ 20.136381] process_one_work+0x530/0xf98 [ 20.136497] worker_thread+0x618/0xf38 [ 20.136584] kthread+0x328/0x630 [ 20.136668] ret_from_fork+0x10/0x20 [ 20.137603] [ 20.137668] Last potentially related work creation: [ 20.137929] kasan_save_stack+0x3c/0x68 [ 20.138055] kasan_record_aux_stack+0xb4/0xc8 [ 20.138147] __queue_work+0x65c/0x1008 [ 20.138439] queue_work_on+0xbc/0xf8 [ 20.138540] workqueue_uaf+0x210/0x4a8 [ 20.138779] kunit_try_run_case+0x170/0x3f0 [ 20.139470] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.139745] kthread+0x328/0x630 [ 20.139830] ret_from_fork+0x10/0x20 [ 20.139956] [ 20.140002] The buggy address belongs to the object at fff00000c6674300 [ 20.140002] which belongs to the cache kmalloc-32 of size 32 [ 20.140539] The buggy address is located 0 bytes inside of [ 20.140539] freed 32-byte region [fff00000c6674300, fff00000c6674320) [ 20.140735] [ 20.140795] The buggy address belongs to the physical page: [ 20.140877] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106674 [ 20.141260] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.141703] page_type: f5(slab) [ 20.141806] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.142109] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.142245] page dumped because: kasan: bad access detected [ 20.142321] [ 20.142354] Memory state around the buggy address: [ 20.142600] fff00000c6674200: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 20.142715] fff00000c6674280: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 20.142968] >fff00000c6674300: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.143067] ^ [ 20.143132] fff00000c6674380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.143641] fff00000c6674400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.143966] ==================================================================
[ 12.147025] ================================================================== [ 12.147754] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 12.148062] Read of size 8 at addr ffff888103180f80 by task kunit_try_catch/217 [ 12.148821] [ 12.149215] CPU: 0 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.149366] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.149392] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.149415] Call Trace: [ 12.149430] <TASK> [ 12.149449] dump_stack_lvl+0x73/0xb0 [ 12.149516] print_report+0xd1/0x650 [ 12.149539] ? __virt_addr_valid+0x1db/0x2d0 [ 12.149561] ? workqueue_uaf+0x4d6/0x560 [ 12.149581] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.149601] ? workqueue_uaf+0x4d6/0x560 [ 12.149621] kasan_report+0x141/0x180 [ 12.149642] ? workqueue_uaf+0x4d6/0x560 [ 12.149666] __asan_report_load8_noabort+0x18/0x20 [ 12.149689] workqueue_uaf+0x4d6/0x560 [ 12.149710] ? __pfx_workqueue_uaf+0x10/0x10 [ 12.149731] ? __schedule+0x10cc/0x2b60 [ 12.149751] ? __pfx_read_tsc+0x10/0x10 [ 12.149772] ? ktime_get_ts64+0x86/0x230 [ 12.149796] kunit_try_run_case+0x1a5/0x480 [ 12.149819] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.149840] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.149862] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.149883] ? __kthread_parkme+0x82/0x180 [ 12.149903] ? preempt_count_sub+0x50/0x80 [ 12.149926] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.149948] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.149969] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.149990] kthread+0x337/0x6f0 [ 12.150008] ? trace_preempt_on+0x20/0xc0 [ 12.150032] ? __pfx_kthread+0x10/0x10 [ 12.150051] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.150071] ? calculate_sigpending+0x7b/0xa0 [ 12.150094] ? __pfx_kthread+0x10/0x10 [ 12.150131] ret_from_fork+0x116/0x1d0 [ 12.150149] ? __pfx_kthread+0x10/0x10 [ 12.150168] ret_from_fork_asm+0x1a/0x30 [ 12.150197] </TASK> [ 12.150209] [ 12.163622] Allocated by task 217: [ 12.164089] kasan_save_stack+0x45/0x70 [ 12.164315] kasan_save_track+0x18/0x40 [ 12.164474] kasan_save_alloc_info+0x3b/0x50 [ 12.164917] __kasan_kmalloc+0xb7/0xc0 [ 12.165136] __kmalloc_cache_noprof+0x189/0x420 [ 12.165450] workqueue_uaf+0x152/0x560 [ 12.165763] kunit_try_run_case+0x1a5/0x480 [ 12.165915] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.166424] kthread+0x337/0x6f0 [ 12.166592] ret_from_fork+0x116/0x1d0 [ 12.166913] ret_from_fork_asm+0x1a/0x30 [ 12.167210] [ 12.167287] Freed by task 9: [ 12.167552] kasan_save_stack+0x45/0x70 [ 12.167950] kasan_save_track+0x18/0x40 [ 12.168144] kasan_save_free_info+0x3f/0x60 [ 12.168373] __kasan_slab_free+0x56/0x70 [ 12.168548] kfree+0x222/0x3f0 [ 12.168676] workqueue_uaf_work+0x12/0x20 [ 12.168875] process_one_work+0x5ee/0xf60 [ 12.169068] worker_thread+0x758/0x1220 [ 12.169743] kthread+0x337/0x6f0 [ 12.169925] ret_from_fork+0x116/0x1d0 [ 12.170074] ret_from_fork_asm+0x1a/0x30 [ 12.170629] [ 12.170733] Last potentially related work creation: [ 12.171027] kasan_save_stack+0x45/0x70 [ 12.171422] kasan_record_aux_stack+0xb2/0xc0 [ 12.171618] __queue_work+0x626/0xeb0 [ 12.171919] queue_work_on+0xb6/0xc0 [ 12.172089] workqueue_uaf+0x26d/0x560 [ 12.172457] kunit_try_run_case+0x1a5/0x480 [ 12.172721] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.172953] kthread+0x337/0x6f0 [ 12.173111] ret_from_fork+0x116/0x1d0 [ 12.173544] ret_from_fork_asm+0x1a/0x30 [ 12.173805] [ 12.173884] The buggy address belongs to the object at ffff888103180f80 [ 12.173884] which belongs to the cache kmalloc-32 of size 32 [ 12.174735] The buggy address is located 0 bytes inside of [ 12.174735] freed 32-byte region [ffff888103180f80, ffff888103180fa0) [ 12.175252] [ 12.175374] The buggy address belongs to the physical page: [ 12.175909] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103180 [ 12.176398] flags: 0x200000000000000(node=0|zone=2) [ 12.176625] page_type: f5(slab) [ 12.176919] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.177329] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.177647] page dumped because: kasan: bad access detected [ 12.177892] [ 12.177980] Memory state around the buggy address: [ 12.178532] ffff888103180e80: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 12.178814] ffff888103180f00: 00 00 07 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 12.179316] >ffff888103180f80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 12.179846] ^ [ 12.180004] ffff888103181000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.180440] ffff888103181080: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc [ 12.180804] ==================================================================