Sign in
Sign up
Explore
Enterprise
Education
Search
Help
Terms of use
About Us
Explore
Enterprise
Education
Gitee Premium
Gitee AI
AI teammates
Sign in
Sign up
Fetch the repository succeeded.
description of repo status
Open Source
>
Other
>
Operation System
&&
Donate
Please sign in before you donate.
Cancel
Sign in
Scan WeChat QR to Pay
Cancel
Complete
Prompt
Switch to Alipay.
OK
Cancel
Watch
Unwatch
Watching
Releases Only
Ignoring
458
Star
1.7K
Fork
1.9K
GVP
openEuler
/
kernel
Closed
Code
Issues
1271
Pull Requests
991
Wiki
Insights
Pipelines
Service
Quality Analysis
Jenkins for Gitee
Tencent CloudBase
Tencent Cloud Serverless
悬镜安全
Aliyun SAE
Codeblitz
SBOM
Don’t show this again
Update failed. Please try again later!
Remove this flag
Content Risk Flag
This task is identified by
as the content contains sensitive information such as code security bugs, privacy leaks, etc., so it is only accessible to contributors of this repository.
【OLK-5.10】KFENCE: use-after-free in __skb_clone
Done
#I60P4J
Task
hulk-robot
Opened this issue
2022-11-11 15:12
【严重程度】 一般 【特性】 网络 【重现类型】 有条件必然重现 【* 定位分析】 影响和风险:该问题在开kfence情况下,bpf test程序会触发 kfence uaf,社区主线都是必现。影响系统可用性。 利用条件 :用户态bpf程序传递非对齐的size到内核,内核基于该size构造skbuff 线性区。此时会引起skb shard info的非对齐访问,进而触发kfence ufa的问题。 技术原因 :该问题的本质是arm64 架构不支持非对齐访问。kfence uaf是表象,当在arm64下非对齐访问地址时,就会触发aligment fault错误,该错误会传递到kfence,并最终触发kfence uaf报错。 【* 影响评估及测试建议】 无影响 【* 对外影响描述】 无影响
【严重程度】 一般 【特性】 网络 【重现类型】 有条件必然重现 【* 定位分析】 影响和风险:该问题在开kfence情况下,bpf test程序会触发 kfence uaf,社区主线都是必现。影响系统可用性。 利用条件 :用户态bpf程序传递非对齐的size到内核,内核基于该size构造skbuff 线性区。此时会引起skb shard info的非对齐访问,进而触发kfence ufa的问题。 技术原因 :该问题的本质是arm64 架构不支持非对齐访问。kfence uaf是表象,当在arm64下非对齐访问地址时,就会触发aligment fault错误,该错误会传递到kfence,并最终触发kfence uaf报错。 【* 影响评估及测试建议】 无影响 【* 对外影响描述】 无影响
Comments (
1
)
Sign in
to comment
Status
Done
Backlog
Doing
Done
Declined
Assignees
Not set
hulk-robot
zhixiuzhou
Assignee
Collaborator
+Assign
+Mention
Labels
sig/Kernel
Not set
Projects
Unprojected
Unprojected
Pull Requests
None yet
None yet
Successfully merging a pull request will close this issue.
Branches
No related branch
Branches (
-
)
Tags (
-
)
Planed to start   -   Planed to end
-
Top level
Not Top
Top Level: High
Top Level: Medium
Top Level: Low
Priority
Not specified
Serious
Main
Secondary
Unimportant
Duration
(hours)
参与者(2)
C
1
https://gitee.com/openeuler/kernel.git
git@gitee.com:openeuler/kernel.git
openeuler
kernel
kernel
Going to Help Center
Search
Git 命令在线学习
如何在 Gitee 导入 GitHub 仓库
Git 仓库基础操作
企业版和社区版功能对比
SSH 公钥设置
如何处理代码冲突
仓库体积过大,如何减小?
如何找回被删除的仓库数据
Gitee 产品配额说明
GitHub仓库快速导入Gitee及同步更新
什么是 Release(发行版)
将 PHP 项目自动发布到 packagist.org
Comment
Repository Report
Back to the top
Login prompt
This operation requires login to the code cloud account. Please log in before operating.
Go to login
No account. Register