Date
Nov. 22, 2024, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.897946] ================================================================== [ 34.899308] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 34.900864] Read of size 8 at addr fff00000c6a70a00 by task kunit_try_catch/189 [ 34.903325] [ 34.903792] CPU: 0 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241122 #1 [ 34.905268] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.905965] Hardware name: linux,dummy-virt (DT) [ 34.906701] Call trace: [ 34.907259] show_stack+0x20/0x38 (C) [ 34.908084] dump_stack_lvl+0x8c/0xd0 [ 34.909523] print_report+0x118/0x5e0 [ 34.910193] kasan_report+0xc8/0x118 [ 34.910655] __asan_report_load8_noabort+0x20/0x30 [ 34.911980] workqueue_uaf+0x480/0x4a8 [ 34.912763] kunit_try_run_case+0x14c/0x3d0 [ 34.914036] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.915139] kthread+0x24c/0x2d0 [ 34.915960] ret_from_fork+0x10/0x20 [ 34.916963] [ 34.917223] Allocated by task 189: [ 34.917630] kasan_save_stack+0x3c/0x68 [ 34.919100] kasan_save_track+0x20/0x40 [ 34.919815] kasan_save_alloc_info+0x40/0x58 [ 34.920635] __kasan_kmalloc+0xd4/0xd8 [ 34.921238] __kmalloc_cache_noprof+0x15c/0x3c8 [ 34.922615] workqueue_uaf+0x13c/0x4a8 [ 34.923183] kunit_try_run_case+0x14c/0x3d0 [ 34.923965] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.926057] kthread+0x24c/0x2d0 [ 34.926582] ret_from_fork+0x10/0x20 [ 34.927277] [ 34.928012] Freed by task 10: [ 34.929033] kasan_save_stack+0x3c/0x68 [ 34.929577] kasan_save_track+0x20/0x40 [ 34.930268] kasan_save_free_info+0x4c/0x78 [ 34.931014] __kasan_slab_free+0x6c/0x98 [ 34.931769] kfree+0x114/0x3d0 [ 34.932364] workqueue_uaf_work+0x18/0x30 [ 34.933298] process_one_work+0x530/0xfa8 [ 34.933762] worker_thread+0x614/0xf28 [ 34.934177] kthread+0x24c/0x2d0 [ 34.934758] ret_from_fork+0x10/0x20 [ 34.935806] [ 34.936215] Last potentially related work creation: [ 34.937612] kasan_save_stack+0x3c/0x68 [ 34.938623] __kasan_record_aux_stack+0xbc/0xe8 [ 34.939661] kasan_record_aux_stack_noalloc+0x14/0x20 [ 34.940841] __queue_work+0x654/0xfe0 [ 34.941689] queue_work_on+0xbc/0xf8 [ 34.942218] workqueue_uaf+0x210/0x4a8 [ 34.943280] kunit_try_run_case+0x14c/0x3d0 [ 34.943768] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.944822] kthread+0x24c/0x2d0 [ 34.946172] ret_from_fork+0x10/0x20 [ 34.947151] [ 34.947640] The buggy address belongs to the object at fff00000c6a70a00 [ 34.947640] which belongs to the cache kmalloc-32 of size 32 [ 34.949579] The buggy address is located 0 bytes inside of [ 34.949579] freed 32-byte region [fff00000c6a70a00, fff00000c6a70a20) [ 34.951115] [ 34.952381] The buggy address belongs to the physical page: [ 34.953284] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106a70 [ 34.954102] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.955705] page_type: f5(slab) [ 34.956240] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 34.957377] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 34.958930] page dumped because: kasan: bad access detected [ 34.960063] [ 34.960355] Memory state around the buggy address: [ 34.961954] fff00000c6a70900: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 34.962894] fff00000c6a70980: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 34.963951] >fff00000c6a70a00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 34.964820] ^ [ 34.967350] fff00000c6a70a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.967994] fff00000c6a70b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.968592] ==================================================================
[ 26.114906] ================================================================== [ 26.116259] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 26.116760] Read of size 8 at addr ffff888101ab05c0 by task kunit_try_catch/208 [ 26.117155] [ 26.117400] CPU: 0 UID: 0 PID: 208 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241122 #1 [ 26.118541] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.119007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.119744] Call Trace: [ 26.120242] <TASK> [ 26.120561] dump_stack_lvl+0x73/0xb0 [ 26.121094] print_report+0xd1/0x640 [ 26.121585] ? __virt_addr_valid+0x1db/0x2d0 [ 26.122602] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.123155] kasan_report+0x102/0x140 [ 26.123621] ? workqueue_uaf+0x4d8/0x560 [ 26.124282] ? workqueue_uaf+0x4d8/0x560 [ 26.124711] __asan_report_load8_noabort+0x18/0x20 [ 26.125353] workqueue_uaf+0x4d8/0x560 [ 26.125711] ? __pfx_workqueue_uaf+0x10/0x10 [ 26.126462] ? __schedule+0xc3e/0x2790 [ 26.126843] ? __pfx_read_tsc+0x10/0x10 [ 26.128143] ? ktime_get_ts64+0x84/0x230 [ 26.128657] kunit_try_run_case+0x1b3/0x490 [ 26.129188] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.129711] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 26.130129] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.130724] ? __kthread_parkme+0x82/0x160 [ 26.131385] ? preempt_count_sub+0x50/0x80 [ 26.132013] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.132427] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.133606] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.134344] kthread+0x257/0x310 [ 26.134729] ? __pfx_kthread+0x10/0x10 [ 26.135364] ret_from_fork+0x41/0x80 [ 26.135766] ? __pfx_kthread+0x10/0x10 [ 26.136310] ret_from_fork_asm+0x1a/0x30 [ 26.136769] </TASK> [ 26.137214] [ 26.137468] Allocated by task 208: [ 26.137896] kasan_save_stack+0x3d/0x60 [ 26.138335] kasan_save_track+0x18/0x40 [ 26.139373] kasan_save_alloc_info+0x3b/0x50 [ 26.140142] __kasan_kmalloc+0xb7/0xc0 [ 26.140451] __kmalloc_cache_noprof+0x184/0x410 [ 26.141092] workqueue_uaf+0x153/0x560 [ 26.141527] kunit_try_run_case+0x1b3/0x490 [ 26.142154] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.142736] kthread+0x257/0x310 [ 26.143630] ret_from_fork+0x41/0x80 [ 26.144055] ret_from_fork_asm+0x1a/0x30 [ 26.144666] [ 26.145059] Freed by task 54: [ 26.145361] kasan_save_stack+0x3d/0x60 [ 26.145768] kasan_save_track+0x18/0x40 [ 26.146342] kasan_save_free_info+0x3f/0x60 [ 26.146818] __kasan_slab_free+0x56/0x70 [ 26.147325] kfree+0x123/0x3f0 [ 26.147558] workqueue_uaf_work+0x12/0x20 [ 26.148678] process_one_work+0x5ee/0xf60 [ 26.149181] worker_thread+0x720/0x1300 [ 26.149592] kthread+0x257/0x310 [ 26.149922] ret_from_fork+0x41/0x80 [ 26.150314] ret_from_fork_asm+0x1a/0x30 [ 26.150633] [ 26.151071] Last potentially related work creation: [ 26.151511] kasan_save_stack+0x3d/0x60 [ 26.152123] __kasan_record_aux_stack+0xae/0xc0 [ 26.152560] kasan_record_aux_stack_noalloc+0xf/0x20 [ 26.153344] __queue_work+0x67e/0xf70 [ 26.153713] queue_work_on+0x74/0xa0 [ 26.154139] workqueue_uaf+0x26e/0x560 [ 26.154559] kunit_try_run_case+0x1b3/0x490 [ 26.155942] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.156456] kthread+0x257/0x310 [ 26.156819] ret_from_fork+0x41/0x80 [ 26.157239] ret_from_fork_asm+0x1a/0x30 [ 26.157577] [ 26.157794] The buggy address belongs to the object at ffff888101ab05c0 [ 26.157794] which belongs to the cache kmalloc-32 of size 32 [ 26.159398] The buggy address is located 0 bytes inside of [ 26.159398] freed 32-byte region [ffff888101ab05c0, ffff888101ab05e0) [ 26.160391] [ 26.160577] The buggy address belongs to the physical page: [ 26.161339] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ab0 [ 26.161745] flags: 0x200000000000000(node=0|zone=2) [ 26.163063] page_type: f5(slab) [ 26.163418] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 26.164100] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 26.165062] page dumped because: kasan: bad access detected [ 26.165601] [ 26.165752] Memory state around the buggy address: [ 26.166434] ffff888101ab0480: 00 00 05 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 26.167176] ffff888101ab0500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 26.167670] >ffff888101ab0580: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 26.169075] ^ [ 26.169560] ffff888101ab0600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.170538] ffff888101ab0680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.171277] ==================================================================