On Tue, Oct 30, 2001 at 08:31:10AM +0800, bill wrote: > It is because of Null pointer userd.check linux/Document/Oops.txt this depends on what <address> is, i.e. zero, or a very low number (ndicating a structure member deference where the structure pointer is null). There are 3 causes : 1) kernel bugs - very rare (you didn't specify your kernel version, so...) 2) hardware problem - run memtest86 to check your system 3) your module - it is likely you have a bug in your code. However, your lack of details make it impossible to help you. You get the message when trying to access memory that isn't mapped/accessible regards john -- "If the software that a company produces isn't reliable, adding a bunch of 'Mother, may I' rules to the language and the code won't fix it." - Pete Becker - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/