diff -u -r pcp-2.5.0-2/src/pmdas/linux/proc_pid.c pcp-dev/src/pmdas/linux/proc_pid.c
--- pcp-2.5.0-2/src/pmdas/linux/proc_pid.c	2006-01-16 17:40:19.000000000 +1100
+++ pcp-dev/src/pmdas/linux/proc_pid.c	2006-01-22 04:52:39.997488750 +1100
@@ -153,7 +153,7 @@
 	    sprintf(buf, "/proc/%d/cmdline", pidlist[i]);
 	    if ((fd = open(buf, O_RDONLY)) >= 0) {
 		sprintf(buf, "%06d ", pidlist[i]);
-		if ((k = read(fd, buf+7, sizeof(buf))) > 0) {
+		if ((k = read(fd, buf+7, sizeof(buf)-6)) > 0) {
 			/* Remove NULL terminators from cmdline string array */
 			/* Added by Mike Mason <mmlnx@xxxxxxxxxx> */
 			for (n = 7; n < k + 6; n++) {
@@ -175,7 +175,7 @@
 		k = 0;
 		if ((fd = open(buf, O_RDONLY)) >= 0) {
 		    char buf1[1024];
-		    if ((k = read(fd, buf1, sizeof(buf))) > 0) {
+		    if ((k = read(fd, buf1, sizeof(buf1))) > 0) {
 			if ((p = strchr(buf1, '\n')) != NULL)
 			    *p = '\0';
 			sprintf(buf, "%06d (%s)", pidlist[i], buf1+6);