当我们禁止“proc/kallsyms”或“system.map”时,我们会得到这样的符号
....
c033718c T nf_hook_slow
c04ca284 r __ksymtab_nf_hook_slow
c04ca28c r __ksymtab_nf_hooks
c04d24a0 r __kcrctab_nf_hook_slow
c04d24a4 r __kcrctab_nf_hooks
c04e9122 r __kstrtab_nf_hook_slow
c04e9179 r __kstrtab_nf_hooks
c054d854 D nf_hooks
c0571ca0 d nf
我正在尝试使用call_usermodehelper从Linux5.10中的linux内核模块执行linux终端命令,这个命令是从netfilter钩子中调用的,但是从我所知道的在softirq上下文中运行的情况来看,我似乎不能以任何一种方式执行它。使用'UMH_WAIT_EXEC‘我在发送我正在使用过滤器监视的udp包时得到scheduling while atomic: nc/16886/0x00000101,如果我使用'UMH_NO_WAIT’我得到一个空引用。代码看起来像这样: static unsigned int hfunc(void *priv, struct
我已经编写了这个内核模块,每次我加载它时,它都会使整个系统崩溃(甚至我的键盘leds都开始闪烁)
下面是我正在做的代码:
/*
Coder: Adel *. ******
Creation Date: April/5th/2012
Last Modification Date: April/6th/2012
Purpose: A module to test capturing traffic and just letting it go after knowing if it's an ICMP traffic or not
Notes: T
在从拉伸更新到Buster并从iptables迁移到nftable之后,nft命令不会处理任何给定的命令,只处理list,它不会打印任何内容。
输入nft flush ruleset打印:
Error: Could not process rule: Invalid argument
flush ruleset
^^^^^^^^^^^^^^
Error: Could not process rule: Invalid argument
flush ruleset
^^^^^^^^^^^^^^
nft create table inet filter
Error: Could not proce
我收到消息了 nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. 内核为5.4.23,nftables版本为0.9.3。如何将帮助器分配给ct状态? table ip filter {
chain input {
type filte
当我运行sudo update-initramfs -u时,会得到错误输出
dpkg: warning: version 'KERNEL_VERSION' has bad syntax: version number does not start with digit
update-initramfs: Generating /boot/initrd.img-KERNEL_VERSION
dpkg: warning: version 'KERNEL_VERSION' has bad syntax: version number does not start wi
我计划在rootkit中使用我自己版本的getdents()。代码在这里:
asmlinkage int new_getdents(unsigned int fd, struct linux_dirent *dirp, unsigned int count)
{
int nread;
int bpos;
struct linux_dirent *d;
int (*orig_func)(unsigned int fd, struct linux_dirent *dirp, unsigned int count);
t_syscall_hook *open_