Date
Dec. 5, 2024, 2:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.109007] ================================================================== [ 31.109932] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 31.111114] Read of size 8 at addr fff00000c655f1c0 by task kunit_try_catch/189 [ 31.111980] [ 31.112330] CPU: 1 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241205 #1 [ 31.114319] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.115241] Hardware name: linux,dummy-virt (DT) [ 31.116294] Call trace: [ 31.116606] show_stack+0x20/0x38 (C) [ 31.117507] dump_stack_lvl+0x8c/0xd0 [ 31.118197] print_report+0x118/0x5e0 [ 31.118844] kasan_report+0xc8/0x118 [ 31.119562] __asan_report_load8_noabort+0x20/0x30 [ 31.120477] workqueue_uaf+0x480/0x4a8 [ 31.121209] kunit_try_run_case+0x14c/0x3d0 [ 31.122063] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.122816] kthread+0x24c/0x2d0 [ 31.124102] ret_from_fork+0x10/0x20 [ 31.124641] [ 31.124981] Allocated by task 189: [ 31.125525] kasan_save_stack+0x3c/0x68 [ 31.126181] kasan_save_track+0x20/0x40 [ 31.126772] kasan_save_alloc_info+0x40/0x58 [ 31.127592] __kasan_kmalloc+0xd4/0xd8 [ 31.128302] __kmalloc_cache_noprof+0x15c/0x3c0 [ 31.128847] workqueue_uaf+0x13c/0x4a8 [ 31.129359] kunit_try_run_case+0x14c/0x3d0 [ 31.130064] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.130671] kthread+0x24c/0x2d0 [ 31.131330] ret_from_fork+0x10/0x20 [ 31.132097] [ 31.132475] Freed by task 31: [ 31.132995] kasan_save_stack+0x3c/0x68 [ 31.133694] kasan_save_track+0x20/0x40 [ 31.134342] kasan_save_free_info+0x4c/0x78 [ 31.134938] __kasan_slab_free+0x6c/0x98 [ 31.135892] kfree+0x114/0x3c8 [ 31.136335] workqueue_uaf_work+0x18/0x30 [ 31.137028] process_one_work+0x530/0xf98 [ 31.137621] worker_thread+0x614/0xf28 [ 31.138383] kthread+0x24c/0x2d0 [ 31.138855] ret_from_fork+0x10/0x20 [ 31.139862] [ 31.140232] Last potentially related work creation: [ 31.140823] kasan_save_stack+0x3c/0x68 [ 31.141450] kasan_record_aux_stack+0xb4/0xc8 [ 31.142111] __queue_work+0x65c/0xfd8 [ 31.142636] queue_work_on+0xbc/0xf8 [ 31.143490] workqueue_uaf+0x210/0x4a8 [ 31.144036] kunit_try_run_case+0x14c/0x3d0 [ 31.144637] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.145419] kthread+0x24c/0x2d0 [ 31.146031] ret_from_fork+0x10/0x20 [ 31.146603] [ 31.146933] The buggy address belongs to the object at fff00000c655f1c0 [ 31.146933] which belongs to the cache kmalloc-32 of size 32 [ 31.149128] The buggy address is located 0 bytes inside of [ 31.149128] freed 32-byte region [fff00000c655f1c0, fff00000c655f1e0) [ 31.150613] [ 31.150925] The buggy address belongs to the physical page: [ 31.151893] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10655f [ 31.152822] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.153735] page_type: f5(slab) [ 31.154216] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 31.155131] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 31.156255] page dumped because: kasan: bad access detected [ 31.157112] [ 31.157485] Memory state around the buggy address: [ 31.158226] fff00000c655f080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 31.159457] fff00000c655f100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.160370] >fff00000c655f180: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 31.161280] ^ [ 31.162003] fff00000c655f200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.162828] fff00000c655f280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.163947] ==================================================================
[ 28.967523] ================================================================== [ 28.968374] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 28.968817] Read of size 8 at addr ffff888101ab1b40 by task kunit_try_catch/207 [ 28.970300] [ 28.970582] CPU: 0 UID: 0 PID: 207 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241205 #1 [ 28.971941] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.972369] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 28.973992] Call Trace: [ 28.974389] <TASK> [ 28.975099] dump_stack_lvl+0x73/0xb0 [ 28.975493] print_report+0xd1/0x640 [ 28.975916] ? __virt_addr_valid+0x1db/0x2d0 [ 28.976975] ? kasan_complete_mode_report_info+0x64/0x200 [ 28.977638] kasan_report+0x102/0x140 [ 28.978363] ? workqueue_uaf+0x4d8/0x560 [ 28.978796] ? workqueue_uaf+0x4d8/0x560 [ 28.979449] __asan_report_load8_noabort+0x18/0x20 [ 28.980400] workqueue_uaf+0x4d8/0x560 [ 28.980605] ? __pfx_workqueue_uaf+0x10/0x10 [ 28.981313] ? __schedule+0xc70/0x27e0 [ 28.981862] ? __pfx_read_tsc+0x10/0x10 [ 28.982214] ? ktime_get_ts64+0x86/0x230 [ 28.982561] kunit_try_run_case+0x1b3/0x490 [ 28.983343] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.983928] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 28.984421] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 28.984967] ? __kthread_parkme+0x82/0x160 [ 28.985513] ? preempt_count_sub+0x50/0x80 [ 28.986113] ? __pfx_kunit_try_run_case+0x10/0x10 [ 28.986595] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 28.987410] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.987876] kthread+0x257/0x310 [ 28.988488] ? __pfx_kthread+0x10/0x10 [ 28.989111] ret_from_fork+0x41/0x80 [ 28.989583] ? __pfx_kthread+0x10/0x10 [ 28.990032] ret_from_fork_asm+0x1a/0x30 [ 28.990360] </TASK> [ 28.990666] [ 28.990957] Allocated by task 207: [ 28.991342] kasan_save_stack+0x3d/0x60 [ 28.991964] kasan_save_track+0x18/0x40 [ 28.992471] kasan_save_alloc_info+0x3b/0x50 [ 28.992953] __kasan_kmalloc+0xb7/0xc0 [ 28.993509] __kmalloc_cache_noprof+0x184/0x410 [ 28.994182] workqueue_uaf+0x153/0x560 [ 28.994524] kunit_try_run_case+0x1b3/0x490 [ 28.995105] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 28.995733] kthread+0x257/0x310 [ 28.996180] ret_from_fork+0x41/0x80 [ 28.996625] ret_from_fork_asm+0x1a/0x30 [ 28.997295] [ 28.997469] Freed by task 9: [ 28.997883] kasan_save_stack+0x3d/0x60 [ 28.998370] kasan_save_track+0x18/0x40 [ 28.999255] kasan_save_free_info+0x3f/0x60 [ 28.999749] __kasan_slab_free+0x56/0x70 [ 29.000376] kfree+0x123/0x3f0 [ 29.000764] workqueue_uaf_work+0x12/0x20 [ 29.001379] process_one_work+0x5ee/0xf60 [ 29.001754] worker_thread+0x720/0x1300 [ 29.002491] kthread+0x257/0x310 [ 29.002857] ret_from_fork+0x41/0x80 [ 29.003262] ret_from_fork_asm+0x1a/0x30 [ 29.003787] [ 29.003997] Last potentially related work creation: [ 29.004492] kasan_save_stack+0x3d/0x60 [ 29.005188] kasan_record_aux_stack+0xb2/0xc0 [ 29.005500] __queue_work+0x626/0xe60 [ 29.005927] queue_work_on+0x74/0xa0 [ 29.006513] workqueue_uaf+0x26e/0x560 [ 29.007096] kunit_try_run_case+0x1b3/0x490 [ 29.007512] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.007930] kthread+0x257/0x310 [ 29.008387] ret_from_fork+0x41/0x80 [ 29.008896] ret_from_fork_asm+0x1a/0x30 [ 29.009474] [ 29.009755] The buggy address belongs to the object at ffff888101ab1b40 [ 29.009755] which belongs to the cache kmalloc-32 of size 32 [ 29.010953] The buggy address is located 0 bytes inside of [ 29.010953] freed 32-byte region [ffff888101ab1b40, ffff888101ab1b60) [ 29.012457] [ 29.012718] The buggy address belongs to the physical page: [ 29.013276] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ab1 [ 29.014238] flags: 0x200000000000000(node=0|zone=2) [ 29.014869] page_type: f5(slab) [ 29.015229] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.015874] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.016521] page dumped because: kasan: bad access detected [ 29.017315] [ 29.017557] Memory state around the buggy address: [ 29.018233] ffff888101ab1a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.018870] ffff888101ab1a80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.019707] >ffff888101ab1b00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 29.020418] ^ [ 29.021591] ffff888101ab1b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.022213] ffff888101ab1c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.022770] ==================================================================