Description: Add check for NULL pointer Author: Jörg Frings-Fürst Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=700253 Forwarded: http://www.freelists.org/post/argyllcms/dispwin-bad-command-line-option-makes-dispwin-segfault Reviewed-by: Last-Update: 2015-08-23 --- This patch header follows DEP-3: http://dep.debian.net/deps/dep3/ Index: trunk/spectro/dispwin.c =================================================================== --- trunk.orig/spectro/dispwin.c +++ trunk/spectro/dispwin.c @@ -5556,6 +5556,7 @@ main(int argc, char *argv[]) { /* Display number */ else if (argv[fa][1] == 'd') { + if(na == NULL) usage(0, "-d parameter missing"); if (strncmp(na,"web",3) == 0 || strncmp(na,"WEB",3) == 0) { webdisp = 8080;