Date
June 18, 2025, 6:43 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 21.685965] ================================================================== [ 21.686102] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 21.686259] Read of size 8 at addr fff00000c7707100 by task kunit_try_catch/210 [ 21.686316] [ 21.686567] CPU: 0 UID: 0 PID: 210 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc2-next-20250618 #1 PREEMPT [ 21.686713] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 21.686844] Hardware name: linux,dummy-virt (DT) [ 21.687000] Call trace: [ 21.687084] show_stack+0x20/0x38 (C) [ 21.687359] dump_stack_lvl+0x8c/0xd0 [ 21.687602] print_report+0x118/0x608 [ 21.687670] kasan_report+0xdc/0x128 [ 21.687771] __asan_report_load8_noabort+0x20/0x30 [ 21.688086] workqueue_uaf+0x480/0x4a8 [ 21.688341] kunit_try_run_case+0x170/0x3f0 [ 21.688560] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.688755] kthread+0x328/0x630 [ 21.689145] ret_from_fork+0x10/0x20 [ 21.689280] [ 21.689463] Allocated by task 210: [ 21.689597] kasan_save_stack+0x3c/0x68 [ 21.689740] kasan_save_track+0x20/0x40 [ 21.689792] kasan_save_alloc_info+0x40/0x58 [ 21.690114] __kasan_kmalloc+0xd4/0xd8 [ 21.690216] __kmalloc_cache_noprof+0x16c/0x3c0 [ 21.690314] workqueue_uaf+0x13c/0x4a8 [ 21.690552] kunit_try_run_case+0x170/0x3f0 [ 21.690610] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.690660] kthread+0x328/0x630 [ 21.690753] ret_from_fork+0x10/0x20 [ 21.690807] [ 21.690833] Freed by task 11: [ 21.690901] kasan_save_stack+0x3c/0x68 [ 21.690954] kasan_save_track+0x20/0x40 [ 21.691037] kasan_save_free_info+0x4c/0x78 [ 21.691258] __kasan_slab_free+0x6c/0x98 [ 21.691324] kfree+0x214/0x3c8 [ 21.691360] workqueue_uaf_work+0x18/0x30 [ 21.691404] process_one_work+0x530/0xf98 [ 21.691443] worker_thread+0x618/0xf38 [ 21.691483] kthread+0x328/0x630 [ 21.691514] ret_from_fork+0x10/0x20 [ 21.691552] [ 21.692108] Last potentially related work creation: [ 21.692151] kasan_save_stack+0x3c/0x68 [ 21.692206] kasan_record_aux_stack+0xb4/0xc8 [ 21.692261] __queue_work+0x65c/0xfe0 [ 21.692304] queue_work_on+0xbc/0xf8 [ 21.692340] workqueue_uaf+0x210/0x4a8 [ 21.692381] kunit_try_run_case+0x170/0x3f0 [ 21.692422] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 21.692470] kthread+0x328/0x630 [ 21.692507] ret_from_fork+0x10/0x20 [ 21.692557] [ 21.692582] The buggy address belongs to the object at fff00000c7707100 [ 21.692582] which belongs to the cache kmalloc-32 of size 32 [ 21.694252] The buggy address is located 0 bytes inside of [ 21.694252] freed 32-byte region [fff00000c7707100, fff00000c7707120) [ 21.694362] [ 21.694542] The buggy address belongs to the physical page: [ 21.694582] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107707 [ 21.694794] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 21.694860] page_type: f5(slab) [ 21.694914] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 21.695149] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.695342] page dumped because: kasan: bad access detected [ 21.695561] [ 21.695597] Memory state around the buggy address: [ 21.695640] fff00000c7707000: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 21.695693] fff00000c7707080: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 21.695761] >fff00000c7707100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.695806] ^ [ 21.695839] fff00000c7707180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.695888] fff00000c7707200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.695933] ==================================================================
[ 11.752067] ================================================================== [ 11.752785] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 11.753328] Read of size 8 at addr ffff88810387ab40 by task kunit_try_catch/226 [ 11.753581] [ 11.753881] CPU: 1 UID: 0 PID: 226 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250618 #1 PREEMPT(voluntary) [ 11.753933] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.753945] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.753966] Call Trace: [ 11.753978] <TASK> [ 11.754152] dump_stack_lvl+0x73/0xb0 [ 11.754186] print_report+0xd1/0x650 [ 11.754220] ? __virt_addr_valid+0x1db/0x2d0 [ 11.754241] ? workqueue_uaf+0x4d6/0x560 [ 11.754261] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.754285] ? workqueue_uaf+0x4d6/0x560 [ 11.754304] kasan_report+0x141/0x180 [ 11.754324] ? workqueue_uaf+0x4d6/0x560 [ 11.754348] __asan_report_load8_noabort+0x18/0x20 [ 11.754370] workqueue_uaf+0x4d6/0x560 [ 11.754391] ? __pfx_workqueue_uaf+0x10/0x10 [ 11.754412] ? __schedule+0x10cc/0x2b60 [ 11.754433] ? __pfx_read_tsc+0x10/0x10 [ 11.754453] ? ktime_get_ts64+0x86/0x230 [ 11.754477] kunit_try_run_case+0x1a5/0x480 [ 11.754499] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.754520] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.754542] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.754562] ? __kthread_parkme+0x82/0x180 [ 11.754582] ? preempt_count_sub+0x50/0x80 [ 11.754606] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.754628] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.754649] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.754670] kthread+0x337/0x6f0 [ 11.754688] ? trace_preempt_on+0x20/0xc0 [ 11.754711] ? __pfx_kthread+0x10/0x10 [ 11.754730] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.754749] ? calculate_sigpending+0x7b/0xa0 [ 11.754771] ? __pfx_kthread+0x10/0x10 [ 11.754791] ret_from_fork+0x116/0x1d0 [ 11.754809] ? __pfx_kthread+0x10/0x10 [ 11.754828] ret_from_fork_asm+0x1a/0x30 [ 11.754856] </TASK> [ 11.754866] [ 11.765515] Allocated by task 226: [ 11.765842] kasan_save_stack+0x45/0x70 [ 11.766133] kasan_save_track+0x18/0x40 [ 11.766326] kasan_save_alloc_info+0x3b/0x50 [ 11.766527] __kasan_kmalloc+0xb7/0xc0 [ 11.766694] __kmalloc_cache_noprof+0x189/0x420 [ 11.766896] workqueue_uaf+0x152/0x560 [ 11.767075] kunit_try_run_case+0x1a5/0x480 [ 11.767274] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.767505] kthread+0x337/0x6f0 [ 11.767654] ret_from_fork+0x116/0x1d0 [ 11.767822] ret_from_fork_asm+0x1a/0x30 [ 11.768001] [ 11.768075] Freed by task 41: [ 11.768875] kasan_save_stack+0x45/0x70 [ 11.769115] kasan_save_track+0x18/0x40 [ 11.769413] kasan_save_free_info+0x3f/0x60 [ 11.769641] __kasan_slab_free+0x56/0x70 [ 11.769820] kfree+0x222/0x3f0 [ 11.770150] workqueue_uaf_work+0x12/0x20 [ 11.770536] process_one_work+0x5ee/0xf60 [ 11.770730] worker_thread+0x758/0x1220 [ 11.770938] kthread+0x337/0x6f0 [ 11.771051] ret_from_fork+0x116/0x1d0 [ 11.771306] ret_from_fork_asm+0x1a/0x30 [ 11.771787] [ 11.771898] Last potentially related work creation: [ 11.772246] kasan_save_stack+0x45/0x70 [ 11.772590] kasan_record_aux_stack+0xb2/0xc0 [ 11.772815] __queue_work+0x61a/0xe70 [ 11.772995] queue_work_on+0xb6/0xc0 [ 11.773340] workqueue_uaf+0x26d/0x560 [ 11.773613] kunit_try_run_case+0x1a5/0x480 [ 11.773910] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.774245] kthread+0x337/0x6f0 [ 11.774421] ret_from_fork+0x116/0x1d0 [ 11.774834] ret_from_fork_asm+0x1a/0x30 [ 11.775023] [ 11.775111] The buggy address belongs to the object at ffff88810387ab40 [ 11.775111] which belongs to the cache kmalloc-32 of size 32 [ 11.775937] The buggy address is located 0 bytes inside of [ 11.775937] freed 32-byte region [ffff88810387ab40, ffff88810387ab60) [ 11.776763] [ 11.776864] The buggy address belongs to the physical page: [ 11.777079] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10387a [ 11.777851] flags: 0x200000000000000(node=0|zone=2) [ 11.778109] page_type: f5(slab) [ 11.778471] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 11.778925] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 11.779482] page dumped because: kasan: bad access detected [ 11.779742] [ 11.779954] Memory state around the buggy address: [ 11.780140] ffff88810387aa00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 11.780570] ffff88810387aa80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 11.781047] >ffff88810387ab00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 11.781572] ^ [ 11.781990] ffff88810387ab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.782673] ffff88810387ac00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.783080] ==================================================================