Hello,
I came across the function: call_usermodehelper
This can be used to invoke exec a binary from the kernel space.
It ultimately calls:
call_usermodehelper_exec_async
Which internally does:
retval = do_execve(getname_kernel(sub_info->path),(const char __user *const __user *)sub_info->argv,(const char __user *const __user *)sub_info->envp);
This function works as expected and a new thread is spawned.
Now when I try to directly call do_execve within my module by passing the required arguments, I am getting -EFAULT error.
This is happening in this function:
count(argv, MAX_ARG_STRINGS)
What am I missing here?
Thank you
Hemanth
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