Chris, Thanks it worked like a charm. No more segmentation faults and I was able to print the contents of the array I copied from userspace! Wow I should have come here earlier in the week instead of beating my head against the wall for so long :-) -----Original Message----- From: Chris Brannon [mailto:chris@xxxxxxxxxxxxxxxx] Sent: Thursday, July 18, 2013 9:05 AM To: Speakup is a screen review system for Linux. Subject: Re: OT: kernel oops Don Raikes <don.raikes at oracle.com> writes: > The section of code that is having problems looks like this: *SNIP* > if (copy_from_user(&tbuf, buf, count)) This line is your problem. You are passing a pointer-to-pointer-to-character (char **) as the first argument to copy_from_user, but you should be passing char * instead. So ditch the ampersand, and all will be right with the world! I could give you a thorough explanation of why this is failing, if you like, but to make a long story short, this line of code is smashing the stack! I'm always happy to help. -- Chris _______________________________________________ Speakup mailing list Speakup at linux-speakup.org http://linux-speakup.org/cgi-bin/mailman/listinfo/speakup
