mm/hugetlb：在 ENOMEM 时不调用 vma_add_reservation（CVE-2024-39477）
CVE编号
CVE-2024-39477利用情况
暂无补丁情况
N/A披露时间
2024-07-05漏洞描述
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not call vma_add_reservation upon ENOMEM sysbot reported a splat [1] on __unmap_hugepage_range(). This is because vma_needs_reservation() can return -ENOMEM if allocate_file_region_entries() fails to allocate the file_region struct for the reservation. Check for that and do not call vma_add_reservation() if that is the case, otherwise region_abort() and region_del() will see that we do not have any file_regions. If we detect that vma_needs_reservation() returned -ENOMEM, we clear the hugetlb_restore_reserve flag as if this reservation was still consumed, so free_huge_folio() will not increment the resv count. [1] https://lore.kernel.org/linux-mm/[email protected]/T/#ma5983bc1ab18a54910da83416b3f89f3c7ee43aa解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
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| https://git.kernel.org/stable/c/8daf9c702ee7f825f0de8600abff764acfedea13 | |
| https://git.kernel.org/stable/c/aa998f9dcb34c28448f86e8f5490f20d5eb0eac7 |
- 攻击路径 N/A
- 攻击复杂度 N/A
- 权限要求 N/A
- 影响范围 N/A
- 用户交互 N/A
- 可用性 N/A
- 保密性 N/A
- 完整性 N/A
| CWE-ID | 漏洞类型 |
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