Your module is a part of the kernel. Your system call always takes a user space string. when you supply a kernel space string your sys call will reject it. try using fs = get_fs(); // fs is of type mm_segment_t set_fs(get_ds()) /* your code here*/ set_fs(fs); That is, let the sys call consider the kernel space to be a valid source of input. Also look at filp_open if you really want to open a file in kernel space. Regards, Mohit Kalra "It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts." I am not using the systemcall open(). I am using the sys_open(). I create a function pointer of the type sys_open say my_open and do my_open = syscall[__NR_OPEN]; and then use it to open the file... But when i do this, i am getting an errno of -14 which is I suppose illegal operation. So what more do i need to open the file from my module. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
