Date
June 17, 2025, 3:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.553014] ================================================================== [ 22.553218] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 22.555349] Read of size 8 at addr fff00000c58e1d00 by task kunit_try_catch/202 [ 22.555491] [ 22.555660] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 22.555952] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.556363] Hardware name: linux,dummy-virt (DT) [ 22.556623] Call trace: [ 22.556744] show_stack+0x20/0x38 (C) [ 22.557077] dump_stack_lvl+0x8c/0xd0 [ 22.557445] print_report+0x118/0x608 [ 22.557584] kasan_report+0xdc/0x128 [ 22.557689] __asan_report_load8_noabort+0x20/0x30 [ 22.557893] workqueue_uaf+0x480/0x4a8 [ 22.558060] kunit_try_run_case+0x170/0x3f0 [ 22.558219] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.558382] kthread+0x328/0x630 [ 22.558471] ret_from_fork+0x10/0x20 [ 22.558563] [ 22.558636] Allocated by task 202: [ 22.558706] kasan_save_stack+0x3c/0x68 [ 22.558971] kasan_save_track+0x20/0x40 [ 22.559151] kasan_save_alloc_info+0x40/0x58 [ 22.559267] __kasan_kmalloc+0xd4/0xd8 [ 22.559357] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.559445] workqueue_uaf+0x13c/0x4a8 [ 22.559534] kunit_try_run_case+0x170/0x3f0 [ 22.559626] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.559742] kthread+0x328/0x630 [ 22.559839] ret_from_fork+0x10/0x20 [ 22.559981] [ 22.560053] Freed by task 9: [ 22.560165] kasan_save_stack+0x3c/0x68 [ 22.560261] kasan_save_track+0x20/0x40 [ 22.560350] kasan_save_free_info+0x4c/0x78 [ 22.560443] __kasan_slab_free+0x6c/0x98 [ 22.560540] kfree+0x214/0x3c8 [ 22.560647] workqueue_uaf_work+0x18/0x30 [ 22.560766] process_one_work+0x530/0xf98 [ 22.560882] worker_thread+0x618/0xf38 [ 22.560967] kthread+0x328/0x630 [ 22.561082] ret_from_fork+0x10/0x20 [ 22.561180] [ 22.561226] Last potentially related work creation: [ 22.561310] kasan_save_stack+0x3c/0x68 [ 22.561493] kasan_record_aux_stack+0xb4/0xc8 [ 22.561584] __queue_work+0x65c/0x1008 [ 22.561663] queue_work_on+0xbc/0xf8 [ 22.561751] workqueue_uaf+0x210/0x4a8 [ 22.561820] kunit_try_run_case+0x170/0x3f0 [ 22.561915] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.562017] kthread+0x328/0x630 [ 22.562121] ret_from_fork+0x10/0x20 [ 22.562243] [ 22.562315] The buggy address belongs to the object at fff00000c58e1d00 [ 22.562315] which belongs to the cache kmalloc-32 of size 32 [ 22.562468] The buggy address is located 0 bytes inside of [ 22.562468] freed 32-byte region [fff00000c58e1d00, fff00000c58e1d20) [ 22.562625] [ 22.562671] The buggy address belongs to the physical page: [ 22.562760] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058e1 [ 22.562901] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.563027] page_type: f5(slab) [ 22.563132] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.563458] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 22.563580] page dumped because: kasan: bad access detected [ 22.563666] [ 22.563710] Memory state around the buggy address: [ 22.563811] fff00000c58e1c00: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.563922] fff00000c58e1c80: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 22.564025] >fff00000c58e1d00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 22.564129] ^ [ 22.564205] fff00000c58e1d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.565355] fff00000c58e1e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.565564] ==================================================================
[ 20.337910] ================================================================== [ 20.338889] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 20.339575] Read of size 8 at addr ffff888102edc900 by task kunit_try_catch/220 [ 20.340716] [ 20.341030] CPU: 1 UID: 0 PID: 220 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 20.341169] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.341224] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.341313] Call Trace: [ 20.341360] <TASK> [ 20.341413] dump_stack_lvl+0x73/0xb0 [ 20.341494] print_report+0xd1/0x650 [ 20.341571] ? __virt_addr_valid+0x1db/0x2d0 [ 20.341672] ? workqueue_uaf+0x4d6/0x560 [ 20.341749] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.341976] ? workqueue_uaf+0x4d6/0x560 [ 20.342192] kasan_report+0x141/0x180 [ 20.342335] ? workqueue_uaf+0x4d6/0x560 [ 20.342430] __asan_report_load8_noabort+0x18/0x20 [ 20.342501] workqueue_uaf+0x4d6/0x560 [ 20.342544] ? __pfx_workqueue_uaf+0x10/0x10 [ 20.342582] ? __schedule+0x10cc/0x2b60 [ 20.342619] ? __pfx_read_tsc+0x10/0x10 [ 20.342651] ? ktime_get_ts64+0x86/0x230 [ 20.342693] kunit_try_run_case+0x1a5/0x480 [ 20.342732] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.342766] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.342803] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.342838] ? __kthread_parkme+0x82/0x180 [ 20.342872] ? preempt_count_sub+0x50/0x80 [ 20.342909] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.342948] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.343027] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.343110] kthread+0x337/0x6f0 [ 20.343147] ? trace_preempt_on+0x20/0xc0 [ 20.343184] ? __pfx_kthread+0x10/0x10 [ 20.343210] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.343242] ? calculate_sigpending+0x7b/0xa0 [ 20.343274] ? __pfx_kthread+0x10/0x10 [ 20.343329] ret_from_fork+0x41/0x80 [ 20.343364] ? __pfx_kthread+0x10/0x10 [ 20.343391] ret_from_fork_asm+0x1a/0x30 [ 20.343437] </TASK> [ 20.343453] [ 20.365953] Allocated by task 220: [ 20.366597] kasan_save_stack+0x45/0x70 [ 20.366986] kasan_save_track+0x18/0x40 [ 20.367842] kasan_save_alloc_info+0x3b/0x50 [ 20.368404] __kasan_kmalloc+0xb7/0xc0 [ 20.368729] __kmalloc_cache_noprof+0x189/0x420 [ 20.369475] workqueue_uaf+0x152/0x560 [ 20.369817] kunit_try_run_case+0x1a5/0x480 [ 20.370279] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.370825] kthread+0x337/0x6f0 [ 20.371192] ret_from_fork+0x41/0x80 [ 20.372329] ret_from_fork_asm+0x1a/0x30 [ 20.372783] [ 20.373155] Freed by task 24: [ 20.373559] kasan_save_stack+0x45/0x70 [ 20.374207] kasan_save_track+0x18/0x40 [ 20.374645] kasan_save_free_info+0x3f/0x60 [ 20.375538] __kasan_slab_free+0x56/0x70 [ 20.376199] kfree+0x222/0x3f0 [ 20.376562] workqueue_uaf_work+0x12/0x20 [ 20.377232] process_one_work+0x5ee/0xf60 [ 20.377733] worker_thread+0x758/0x1220 [ 20.378301] kthread+0x337/0x6f0 [ 20.378690] ret_from_fork+0x41/0x80 [ 20.379593] ret_from_fork_asm+0x1a/0x30 [ 20.380325] [ 20.380554] Last potentially related work creation: [ 20.381158] kasan_save_stack+0x45/0x70 [ 20.381702] kasan_record_aux_stack+0xb2/0xc0 [ 20.382167] __queue_work+0x626/0xeb0 [ 20.382753] queue_work_on+0xb6/0xc0 [ 20.383176] workqueue_uaf+0x26d/0x560 [ 20.383744] kunit_try_run_case+0x1a5/0x480 [ 20.384315] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.384804] kthread+0x337/0x6f0 [ 20.385223] ret_from_fork+0x41/0x80 [ 20.386211] ret_from_fork_asm+0x1a/0x30 [ 20.386660] [ 20.386898] The buggy address belongs to the object at ffff888102edc900 [ 20.386898] which belongs to the cache kmalloc-32 of size 32 [ 20.388069] The buggy address is located 0 bytes inside of [ 20.388069] freed 32-byte region [ffff888102edc900, ffff888102edc920) [ 20.389232] [ 20.389827] The buggy address belongs to the physical page: [ 20.390254] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102edc [ 20.392085] flags: 0x200000000000000(node=0|zone=2) [ 20.392655] page_type: f5(slab) [ 20.392950] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 20.393548] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.393943] page dumped because: kasan: bad access detected [ 20.394261] [ 20.394484] Memory state around the buggy address: [ 20.394951] ffff888102edc800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.395587] ffff888102edc880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.396220] >ffff888102edc900: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 20.396673] ^ [ 20.396953] ffff888102edc980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.397428] ffff888102edca00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.401218] ==================================================================