kernel catcher

Release date:Updated on: 2010-09-17 Affected Systems:Linux kernel 2.6.xDescription:--------------------------------------------------------------------------------Cve id: CVE-2010-3295 Linux Kernel is the Kernel used by open source Linux. Drivers/net/tulip/de4x5. the de4x5_ioctl () function in the c driver incorrectly copies the addr member rather than the exp

Kernel File System API d_alloc, kernel apid_alloc D_alloc for Kernel File System APIs Struct dentry * d_alloc (struct dentry * parent, const struct qstr * name) is used to apply for and return a dentry. The source code analysis is as follows: struct dentry * d_alloc (struct dentry * parent, const struct qstr * name) {# these first applications apply for a de

Vfs_stat for Kernel File System APIs and apivfs_stat for Kernel Vfs_stat for Kernel File System APIs Static inline int vfs_stat (const char _ user * filename, struct kstat * stat) is used to find the attribute information of the file represented by the filename parameter, save it to the form parameter stat and return it to the user for source code analysis: st

Signal mechanism in Linux kernel-from user layer to kernel layer Kernel version:2.6.14 CPU architecture:ARM920T Author:Ce123. (http://blog.csdn.net/ce123) 1. Introduction If a process needs to process a signal, it must register the signal in the process. The registration signal is mainly used to determine the ing relationship between the signal value and the act

Linux Kernel Function fls (), Linux kernel function fls Functions of Linux kernel functions fls () /*** Fls-find last (most-significant) bit set * @ x: the word to search ** This is defined the same way as ffs. * Note fls (0) = 0, fls (1) = 1, fls (0x80000000) = 32. */static _ always_inline int fls (int x) {int r = 32; if (! X) return 0; if (! (X 0xffff0000u)

LFS kernel panic solution: replacing kernel and configuring fstab, lfsfstab /********************************************************************** Author : Samson* Date : 04/27/2015* Test platform:* gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2* GNU bash, 4.3.11(1)-release (x86_64-pc-linux-gnu) * *******************************************************************/ LFS 7.7 is the version used for LFS practice. You can

The above mentioned modification to the kconfig file, Added Config embedsky_helloTristate "tq2440/sky2440 Hello driver"Depends on arch_s3c2440HelpEmbedsky tq2440/sky2440 hello.These lines of code indicate that the embedsky_hello driver needs to be compiled. What we need to do is Modify the MAKEFILE file in the same parent directory Add this line to makefile, OBJ-$ (config_embedsky_hello) + = embedsky_hello.o Then select in the kernel compilation op

Judge the summary of the browser kernel and version number method, and the kernel version number Determine the browser kernel and version number through jquery Copy codeThe Code is as follows: Determine browsers Based on browser version information Copy codeThe Code is as follows:Var _ uat = navigator. userAgent;If (_ uat. indexOf ("MSIE 6.0")> 0) alert ("ie6 ");

Http://blogold.chinaunix.net/u3/101649/showart.php? Id = 2073912 Follow these steps to draw the following conclusions: Copy Linux kernel from 0x00060000 to 0x30008000, size = 0x00500000... DoneZimage magic = 0x016f2818Setup Linux parameters at 0x30000100Linux Command Line is: "noinitrd root =/dev/mtdblock3 init =/linuxrc console = ttysaC0"Machine Type = 1999Now, booting LINUX ......Uncompressing Linux ...................................... .......

After three days of hard work, we finally achieved the communication mechanism we needed: the kernel state gives feedback to the user State; First look at the code, the kernel: # Include User's: # Include MAKEFILE file: OBJ-M: = self. O Compile method: make directly View results: You must first run insmod self. Ko Then run./U on another terminal. You can see the effect and follow the dmesg informati

ffffffffc08df110 C000000594093D20 C000000594093D20...Call Trace: [Jiffies:0x1003fe6ae][[[[[[[[[[[[Cpu 0$0:0000000000000000 0000000000000014 6b6b6b6b6b6b6b6b c00000058b4be318$4:c00000058b4be318 c0000004b83837e0 0000000000000000 c0000004b9780270$8:0000000000000004 c0000004b97803b0 0000000000000001 0000000000275c43$12:0000000000000028 ffffffffc0607568 ffffffffc0694b98 1ebdefda014b0000$16:c00000058b4be318 c000000489904298 c00000058b4be318 C0000004c6c59a38$20:C0000004C6C59A10 0400000000000000 FFFFFF

1 Event Kernel Object2 3 There are two different types of event type objects, manual reset and automatic reset4 Manual Reset: When a manual reset object is triggered, all threads waiting for the object become available for dispatch. 5 Automatic Reset: When an automatic reset object is triggered, only one thread waiting for the event becomes scheduled6 7 here is a function to create an event kernel object:8

written;Epollpri: Indicates that the corresponding file descriptor has an urgent data readableEpollerr: Indicates that the corresponding file descriptor has an error;Epollhup: Indicates that the corresponding file descriptor is hung;Epollet: Indicates the corresponding file description have event occurs;2. Epoll_create In the realization of bionic see: Epoll_create. S, it directly to the system call, the system call table see KERNEL:SRC/INCLUDE/LINUX/SYSCALLS.H, according to the rules in the

Linux Kernel kernel/bpf/verifier. clocal Denial of Service Vulnerability (CVE-2017-17863)Linux Kernel kernel/bpf/verifier. clocal Denial of Service Vulnerability (CVE-2017-17863) Release date:Updated on:Affected Systems: Linux kernel 4.9.x－4.9.71 Description: Bugtraq id: 10

I upgraded Ubuntu14.04 to the latest 4.0.5 kernel version. I didn't plan to record it, But I encountered some problems during the upgrade, So I recorded it, share it with yuanyou who have encountered the same problem. Go to the official website to download the latest kernel compressed package: https://www.kernel.org/speed, just use the thunder in the virtual machine to download it, and then try again. LZ co

Preface In the last few months, I have made a rough research on Linux kernel. Next I need to perform in-depth and detailed analysis. It mainly uses a Development Board of S3C2440 as the hardware entity. It includes the following content: 1 bootloader analysis, mainly uboot, combined with the specific situation of the Development Board. My goal is to explain how uboot works (to be honest, I don't want to be kidnapped by hardware during the analysis, bu

To compile the linux module on the X86 platform, the original operating system is not equipped with the kernel source code. Therefore, the kernel cannot be compiled, and the kernel module cannot be tested. According to a lot of information, I decided to upgrade the linux kernel version. The upgrade is successful. The m

1./proc DirectoryThe Linux kernel provides a mechanism for accessing kernel internal data structures and changing kernel settings at run time through the/proc file system. The proc file system is a pseudo-file system that only exists in memory and does not occupy external memory space. It provides an interface for accessing system

ObjectiveIn recent months, the Linux kernel has probably been studied, the following need to conduct in-depth specific analysis. The main development Board of S3C2440 is a hardware entity. It probably contains such things as the following:1 bootloader analysis, to Uboot-based, combined with detailed development of the board. My goal is to explain clearly how uboot works (to be honest, the analysis does not want to be kidnapped by hardware, but it need

July 26, 2014 kernel preemption and kernel control path designA definition of kernel preemption: If a process is executing kernel functions in the kernel state, a kernel switchover is allowed (that is, the process being replaced i