CVE-2022-48714 (GCVE-0-2022-48714)
Vulnerability from cvelistv5
Published
2024-06-20 11:13
Modified
2025-05-04 08:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Use VM_MAP instead of VM_ALLOC for ringbuf After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages after mapping"), non-VM_ALLOC mappings will be marked as accessible in __get_vm_area_node() when KASAN is enabled. But now the flag for ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access after vmap() returns. Because the ringbuf area is created by mapping allocated pages, so use VM_MAP instead. After the change, info in /proc/vmallocinfo also changes from [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmalloc user to [start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmap user
References
Impacted products
Vendor Product Version
Linux Linux Version: 457f44363a8894135c85b7a9afd2bd8196db24ab
Version: 457f44363a8894135c85b7a9afd2bd8196db24ab
Version: 457f44363a8894135c85b7a9afd2bd8196db24ab
Version: 457f44363a8894135c85b7a9afd2bd8196db24ab
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