*/// address 处于内核空间if(unlikely(fault_in_kernel_space(address))) {if(!(error_code & (PF_RSVD | PF_USER | PF_PROT))) {// PF_RSVD: 页面保留,不能分配给进程// PF_USER: 页面是用户空间,不可被内核访问// PF_PROT: 页面只读if(vmalloc_fault(address) >=0)return;if(kmemcheck_fault...
CVE-2021-0920漏洞原理:CVE-2021-0920 是由于 SCM_RIGHTS 的垃圾回收系统(Garbage Collection)中的竞争条件而导致的UAF。SCM_RIGHTS 是一种控制消息,它允许 unix socket将打开的文件描述符从一个进程传输到另一个进程。换句话说,sender发送文件描述符,然后 receiver 从 sender 获取文件描述符。这种文件描述符的传递...
也是 Linux kernel 中最为庞杂的子系统, 没有之一.截止 4.2 版本,内存管理子系统(下简称 MM)所有平台独立的核心代码(C文件和头文件)达到11万6千多行,这还不包括平台相关的 C 代码, 及一些汇编代码;与之相比,调度子系统的平台独立的核心代码才2万8千多行....
https://github.com/tr3ee/CVE-2022-23222 近期在对Linux eBPF进行代码审计的过程中,发现了一枚权限提升漏洞CVE-2022-23222。 此漏洞影响Linux Kernel 5.8 - 5.16,并在5.10.92 / 5.15.15 / 5.16.1中修复。 完整…
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef[2] https://elixir.bootlin.com/linux/v5.6-rc5/source/kernel/bpf/verifier.c#L9984[3] https://github.com/DayJun/Blogs/blob/master/Articles/CVES/CVE-2020-8835/...
Last week, a critical vulnerability identified as CVE-2022-0185was disclosed, affecting Linux kernel versions 5.1 to 5.16.1. Thesecurity vulnerabilityis an integer underflow in the Filesystem Context module that allows a local attacker to run arbitrary code in the context of the kernel, thu...
Linux Kernel CVEs Assorted advisories by Gyorgy Miru and kutyacica Info-leaks 2023: "The code that wasn’t there: Reading memory on an Android device by accident" by Man Yue Mo [article] [CVE-2022-25664] 2023: "EntryBleed: A Universal KASLR Bypass against KPTI on Linux" [paper] [CVE...
Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop, cloud, and IoT.
While various techniques have been introduced to secure the Linux kernel, it still constantly gets compromised.CVE-2021-3715 is a kernel bug in the Linux system, which persisted for over six years and was initially fixed without significant attention due to its perceived low severity, leading to...
2019年,Linux Kernel正式进入5.x时代,众多新特性中,与存储领域相关度最高的便是最新的IO引擎——io_uring。从一些性能测试的结论来看,io_uring性能远高于native AIO方式,带来了巨大的性能提升,这对当前异步IO领域也是一个big news。 对于问题1,本文简述了Linux过往的的IO发展历程,同步IO接口、原生异步IO接口AIO的...