Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.952251] ================================================================== [ 19.952442] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 19.952922] Read of size 8 at addr fff00000c599ef80 by task kunit_try_catch/201 [ 19.953070] [ 19.953174] CPU: 0 UID: 0 PID: 201 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.953385] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.953457] Hardware name: linux,dummy-virt (DT) [ 19.953522] Call trace: [ 19.953570] show_stack+0x20/0x38 (C) [ 19.953724] dump_stack_lvl+0x8c/0xd0 [ 19.953853] print_report+0x118/0x608 [ 19.953956] kasan_report+0xdc/0x128 [ 19.954058] __asan_report_load8_noabort+0x20/0x30 [ 19.954193] workqueue_uaf+0x480/0x4a8 [ 19.954356] kunit_try_run_case+0x170/0x3f0 [ 19.954515] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.954710] kthread+0x328/0x630 [ 19.954816] ret_from_fork+0x10/0x20 [ 19.954932] [ 19.954976] Allocated by task 201: [ 19.955044] kasan_save_stack+0x3c/0x68 [ 19.955161] kasan_save_track+0x20/0x40 [ 19.955254] kasan_save_alloc_info+0x40/0x58 [ 19.955360] __kasan_kmalloc+0xd4/0xd8 [ 19.955437] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.955560] workqueue_uaf+0x13c/0x4a8 [ 19.955673] kunit_try_run_case+0x170/0x3f0 [ 19.955798] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.955918] kthread+0x328/0x630 [ 19.955998] ret_from_fork+0x10/0x20 [ 19.956082] [ 19.956123] Freed by task 9: [ 19.956184] kasan_save_stack+0x3c/0x68 [ 19.956283] kasan_save_track+0x20/0x40 [ 19.956371] kasan_save_free_info+0x4c/0x78 [ 19.956462] __kasan_slab_free+0x6c/0x98 [ 19.956572] kfree+0x214/0x3c8 [ 19.956662] workqueue_uaf_work+0x18/0x30 [ 19.956770] process_one_work+0x530/0xf98 [ 19.956904] worker_thread+0x618/0xf38 [ 19.957006] kthread+0x328/0x630 [ 19.957088] ret_from_fork+0x10/0x20 [ 19.957177] [ 19.957223] Last potentially related work creation: [ 19.957289] kasan_save_stack+0x3c/0x68 [ 19.957387] kasan_record_aux_stack+0xb4/0xc8 [ 19.957519] __queue_work+0x65c/0x1008 [ 19.957604] queue_work_on+0xbc/0xf8 [ 19.957680] workqueue_uaf+0x210/0x4a8 [ 19.957783] kunit_try_run_case+0x170/0x3f0 [ 19.957885] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.958027] kthread+0x328/0x630 [ 19.958102] ret_from_fork+0x10/0x20 [ 19.958221] [ 19.958261] The buggy address belongs to the object at fff00000c599ef80 [ 19.958261] which belongs to the cache kmalloc-32 of size 32 [ 19.958407] The buggy address is located 0 bytes inside of [ 19.958407] freed 32-byte region [fff00000c599ef80, fff00000c599efa0) [ 19.958572] [ 19.958634] The buggy address belongs to the physical page: [ 19.958756] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10599e [ 19.958888] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.959003] page_type: f5(slab) [ 19.959132] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.959288] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.959416] page dumped because: kasan: bad access detected [ 19.959499] [ 19.959558] Memory state around the buggy address: [ 19.959640] fff00000c599ee80: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.959760] fff00000c599ef00: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 19.959920] >fff00000c599ef80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.960016] ^ [ 19.960081] fff00000c599f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.960175] fff00000c599f080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.960272] ==================================================================
[ 13.217696] ================================================================== [ 13.218270] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 13.218670] Read of size 8 at addr ffff888103abf200 by task kunit_try_catch/218 [ 13.219116] [ 13.219305] CPU: 0 UID: 0 PID: 218 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.219411] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.219423] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.219442] Call Trace: [ 13.219455] <TASK> [ 13.219470] dump_stack_lvl+0x73/0xb0 [ 13.219602] print_report+0xd1/0x650 [ 13.219629] ? __virt_addr_valid+0x1db/0x2d0 [ 13.219664] ? workqueue_uaf+0x4d6/0x560 [ 13.219685] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.219707] ? workqueue_uaf+0x4d6/0x560 [ 13.219728] kasan_report+0x141/0x180 [ 13.219762] ? workqueue_uaf+0x4d6/0x560 [ 13.219788] __asan_report_load8_noabort+0x18/0x20 [ 13.219812] workqueue_uaf+0x4d6/0x560 [ 13.219834] ? __pfx_workqueue_uaf+0x10/0x10 [ 13.219856] ? __schedule+0x10cc/0x2b60 [ 13.219877] ? __pfx_read_tsc+0x10/0x10 [ 13.219897] ? ktime_get_ts64+0x86/0x230 [ 13.219921] kunit_try_run_case+0x1a5/0x480 [ 13.219945] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.219968] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.219991] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.220015] ? __kthread_parkme+0x82/0x180 [ 13.220035] ? preempt_count_sub+0x50/0x80 [ 13.220058] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.220083] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.220107] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.220133] kthread+0x337/0x6f0 [ 13.220152] ? trace_preempt_on+0x20/0xc0 [ 13.220176] ? __pfx_kthread+0x10/0x10 [ 13.220196] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.220217] ? calculate_sigpending+0x7b/0xa0 [ 13.220241] ? __pfx_kthread+0x10/0x10 [ 13.220262] ret_from_fork+0x116/0x1d0 [ 13.220280] ? __pfx_kthread+0x10/0x10 [ 13.220300] ret_from_fork_asm+0x1a/0x30 [ 13.220331] </TASK> [ 13.220341] [ 13.229964] Allocated by task 218: [ 13.230137] kasan_save_stack+0x45/0x70 [ 13.230334] kasan_save_track+0x18/0x40 [ 13.230520] kasan_save_alloc_info+0x3b/0x50 [ 13.230935] __kasan_kmalloc+0xb7/0xc0 [ 13.231179] __kmalloc_cache_noprof+0x189/0x420 [ 13.231354] workqueue_uaf+0x152/0x560 [ 13.231667] kunit_try_run_case+0x1a5/0x480 [ 13.231977] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.232328] kthread+0x337/0x6f0 [ 13.232498] ret_from_fork+0x116/0x1d0 [ 13.232795] ret_from_fork_asm+0x1a/0x30 [ 13.232983] [ 13.233083] Freed by task 9: [ 13.233228] kasan_save_stack+0x45/0x70 [ 13.233411] kasan_save_track+0x18/0x40 [ 13.233579] kasan_save_free_info+0x3f/0x60 [ 13.233803] __kasan_slab_free+0x56/0x70 [ 13.234403] kfree+0x222/0x3f0 [ 13.234530] workqueue_uaf_work+0x12/0x20 [ 13.234840] process_one_work+0x5ee/0xf60 [ 13.235287] worker_thread+0x758/0x1220 [ 13.235482] kthread+0x337/0x6f0 [ 13.235758] ret_from_fork+0x116/0x1d0 [ 13.236160] ret_from_fork_asm+0x1a/0x30 [ 13.236423] [ 13.236514] Last potentially related work creation: [ 13.236696] kasan_save_stack+0x45/0x70 [ 13.237148] kasan_record_aux_stack+0xb2/0xc0 [ 13.237320] __queue_work+0x626/0xeb0 [ 13.237512] queue_work_on+0xb6/0xc0 [ 13.237680] workqueue_uaf+0x26d/0x560 [ 13.238123] kunit_try_run_case+0x1a5/0x480 [ 13.238312] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.238657] kthread+0x337/0x6f0 [ 13.238997] ret_from_fork+0x116/0x1d0 [ 13.239156] ret_from_fork_asm+0x1a/0x30 [ 13.239361] [ 13.239436] The buggy address belongs to the object at ffff888103abf200 [ 13.239436] which belongs to the cache kmalloc-32 of size 32 [ 13.240253] The buggy address is located 0 bytes inside of [ 13.240253] freed 32-byte region [ffff888103abf200, ffff888103abf220) [ 13.240915] [ 13.241024] The buggy address belongs to the physical page: [ 13.241248] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103abf [ 13.241728] flags: 0x200000000000000(node=0|zone=2) [ 13.242076] page_type: f5(slab) [ 13.242256] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.242893] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.243326] page dumped because: kasan: bad access detected [ 13.243706] [ 13.243831] Memory state around the buggy address: [ 13.244145] ffff888103abf100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.244403] ffff888103abf180: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.244928] >ffff888103abf200: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 13.245235] ^ [ 13.245377] ffff888103abf280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.245814] ffff888103abf300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.246294] ==================================================================