nmeter: fix read past the end if a buffer. Closes 4594
diff --git a/procps/nmeter.c b/procps/nmeter.c
index 48a5b4e..cded67e 100644
--- a/procps/nmeter.c
+++ b/procps/nmeter.c
@@ -786,8 +786,10 @@
if (argc != 2)
bb_show_usage();
- if (open_read_close("version", buf, sizeof(buf)) > 0)
- is26 = (strstr(buf, " 2.4.")==NULL);
+ if (open_read_close("version", buf, sizeof(buf)-1) > 0) {
+ buf[sizeof(buf)-1] = '\0';
+ is26 = (strstr(buf, " 2.4.") == NULL);
+ }
// Can use argv[1] directly, but this will mess up
// parameters as seen by e.g. ps. Making a copy...
