Date
Dec. 3, 2024, 11:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.506916] ================================================================== [ 31.508284] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 31.509420] Read of size 8 at addr fff00000c58b0840 by task kunit_try_catch/189 [ 31.510381] [ 31.510858] CPU: 0 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241203 #1 [ 31.512345] Tainted: [B]=BAD_PAGE, [N]=TEST [ 31.512837] Hardware name: linux,dummy-virt (DT) [ 31.514353] Call trace: [ 31.514881] show_stack+0x20/0x38 (C) [ 31.515546] dump_stack_lvl+0x8c/0xd0 [ 31.516083] print_report+0x118/0x5e0 [ 31.516776] kasan_report+0xc8/0x118 [ 31.517283] __asan_report_load8_noabort+0x20/0x30 [ 31.518013] workqueue_uaf+0x480/0x4a8 [ 31.518668] kunit_try_run_case+0x14c/0x3d0 [ 31.519503] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.520217] kthread+0x24c/0x2d0 [ 31.520747] ret_from_fork+0x10/0x20 [ 31.521297] [ 31.521601] Allocated by task 189: [ 31.522247] kasan_save_stack+0x3c/0x68 [ 31.522828] kasan_save_track+0x20/0x40 [ 31.523542] kasan_save_alloc_info+0x40/0x58 [ 31.524099] __kasan_kmalloc+0xd4/0xd8 [ 31.524712] __kmalloc_cache_noprof+0x15c/0x3c0 [ 31.525626] workqueue_uaf+0x13c/0x4a8 [ 31.526451] kunit_try_run_case+0x14c/0x3d0 [ 31.526934] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.527845] kthread+0x24c/0x2d0 [ 31.528603] ret_from_fork+0x10/0x20 [ 31.529221] [ 31.529669] Freed by task 10: [ 31.530542] kasan_save_stack+0x3c/0x68 [ 31.531139] kasan_save_track+0x20/0x40 [ 31.531913] kasan_save_free_info+0x4c/0x78 [ 31.532628] __kasan_slab_free+0x6c/0x98 [ 31.533196] kfree+0x114/0x3c8 [ 31.533734] workqueue_uaf_work+0x18/0x30 [ 31.534228] process_one_work+0x530/0xf98 [ 31.535015] worker_thread+0x614/0xf28 [ 31.536103] kthread+0x24c/0x2d0 [ 31.536624] ret_from_fork+0x10/0x20 [ 31.537216] [ 31.537527] Last potentially related work creation: [ 31.538162] kasan_save_stack+0x3c/0x68 [ 31.538881] kasan_record_aux_stack+0xb4/0xc8 [ 31.539682] __queue_work+0x65c/0xfd8 [ 31.540523] queue_work_on+0xbc/0xf8 [ 31.541030] workqueue_uaf+0x210/0x4a8 [ 31.541527] kunit_try_run_case+0x14c/0x3d0 [ 31.542226] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.542967] kthread+0x24c/0x2d0 [ 31.543441] ret_from_fork+0x10/0x20 [ 31.544001] [ 31.544594] The buggy address belongs to the object at fff00000c58b0840 [ 31.544594] which belongs to the cache kmalloc-32 of size 32 [ 31.546080] The buggy address is located 0 bytes inside of [ 31.546080] freed 32-byte region [fff00000c58b0840, fff00000c58b0860) [ 31.548465] [ 31.548832] The buggy address belongs to the physical page: [ 31.549527] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058b0 [ 31.550521] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.551438] page_type: f5(slab) [ 31.551946] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 31.552876] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 31.553981] page dumped because: kasan: bad access detected [ 31.554719] [ 31.555040] Memory state around the buggy address: [ 31.555939] fff00000c58b0700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 31.556688] fff00000c58b0780: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 31.557717] >fff00000c58b0800: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 31.558539] ^ [ 31.559206] fff00000c58b0880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.560300] fff00000c58b0900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.561172] ==================================================================
[ 26.963454] ================================================================== [ 26.964251] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 26.965179] Read of size 8 at addr ffff888102984e00 by task kunit_try_catch/209 [ 26.965944] [ 26.966280] CPU: 0 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241203 #1 [ 26.967511] Tainted: [B]=BAD_PAGE, [N]=TEST [ 26.968246] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 26.969279] Call Trace: [ 26.969925] <TASK> [ 26.970198] dump_stack_lvl+0x73/0xb0 [ 26.970661] print_report+0xd1/0x640 [ 26.971157] ? __virt_addr_valid+0x1db/0x2d0 [ 26.971582] ? kasan_complete_mode_report_info+0x64/0x200 [ 26.972581] kasan_report+0x102/0x140 [ 26.973146] ? workqueue_uaf+0x4d8/0x560 [ 26.973643] ? workqueue_uaf+0x4d8/0x560 [ 26.974322] __asan_report_load8_noabort+0x18/0x20 [ 26.974976] workqueue_uaf+0x4d8/0x560 [ 26.975665] ? __pfx_workqueue_uaf+0x10/0x10 [ 26.976533] ? __schedule+0xc3e/0x2790 [ 26.977158] ? __pfx_read_tsc+0x10/0x10 [ 26.977769] ? ktime_get_ts64+0x86/0x230 [ 26.978619] kunit_try_run_case+0x1b3/0x490 [ 26.979190] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.979952] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 26.980234] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 26.980930] ? __kthread_parkme+0x82/0x160 [ 26.981360] ? preempt_count_sub+0x50/0x80 [ 26.982222] ? __pfx_kunit_try_run_case+0x10/0x10 [ 26.983155] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 26.983911] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.984319] kthread+0x257/0x310 [ 26.985301] ? __pfx_kthread+0x10/0x10 [ 26.985640] ret_from_fork+0x41/0x80 [ 26.986027] ? __pfx_kthread+0x10/0x10 [ 26.986387] ret_from_fork_asm+0x1a/0x30 [ 26.987355] </TASK> [ 26.987607] [ 26.988176] Allocated by task 209: [ 26.988462] kasan_save_stack+0x3d/0x60 [ 26.988882] kasan_save_track+0x18/0x40 [ 26.989308] kasan_save_alloc_info+0x3b/0x50 [ 26.989797] __kasan_kmalloc+0xb7/0xc0 [ 26.990043] __kmalloc_cache_noprof+0x184/0x410 [ 26.991079] workqueue_uaf+0x153/0x560 [ 26.991486] kunit_try_run_case+0x1b3/0x490 [ 26.991862] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 26.992271] kthread+0x257/0x310 [ 26.992635] ret_from_fork+0x41/0x80 [ 26.993010] ret_from_fork_asm+0x1a/0x30 [ 26.993942] [ 26.994167] Freed by task 8: [ 26.994476] kasan_save_stack+0x3d/0x60 [ 26.994959] kasan_save_track+0x18/0x40 [ 26.995389] kasan_save_free_info+0x3f/0x60 [ 26.995996] __kasan_slab_free+0x56/0x70 [ 26.996347] kfree+0x123/0x3f0 [ 26.996718] workqueue_uaf_work+0x12/0x20 [ 26.997701] process_one_work+0x5ee/0xf60 [ 26.998277] worker_thread+0x720/0x1300 [ 26.998609] kthread+0x257/0x310 [ 26.999131] ret_from_fork+0x41/0x80 [ 26.999511] ret_from_fork_asm+0x1a/0x30 [ 27.000121] [ 27.000335] Last potentially related work creation: [ 27.000908] kasan_save_stack+0x3d/0x60 [ 27.001274] kasan_record_aux_stack+0xb2/0xc0 [ 27.001788] __queue_work+0x626/0xe60 [ 27.002660] queue_work_on+0x74/0xa0 [ 27.003069] workqueue_uaf+0x26e/0x560 [ 27.003406] kunit_try_run_case+0x1b3/0x490 [ 27.003843] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.004494] kthread+0x257/0x310 [ 27.004954] ret_from_fork+0x41/0x80 [ 27.005247] ret_from_fork_asm+0x1a/0x30 [ 27.005811] [ 27.006019] The buggy address belongs to the object at ffff888102984e00 [ 27.006019] which belongs to the cache kmalloc-32 of size 32 [ 27.007077] The buggy address is located 0 bytes inside of [ 27.007077] freed 32-byte region [ffff888102984e00, ffff888102984e20) [ 27.008453] [ 27.008699] The buggy address belongs to the physical page: [ 27.009362] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102984 [ 27.010112] flags: 0x200000000000000(node=0|zone=2) [ 27.010716] page_type: f5(slab) [ 27.011088] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 27.011654] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 27.012292] page dumped because: kasan: bad access detected [ 27.013273] [ 27.013415] Memory state around the buggy address: [ 27.013860] ffff888102984d00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.014464] ffff888102984d80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.014907] >ffff888102984e00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 27.015883] ^ [ 27.016230] ffff888102984e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.016779] ffff888102984f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.017409] ==================================================================