snmpd(8): Application.c properly initialize oidbuf for appl_region

[Martijn van Duren]

When registering a region in appl_region (through appl_register) we
fill oidbuf with strlcat, but we don't start from a clean state and
might have garbage prepended.

This oidbuf is only used on error-conditions, so it's unlikely to
trigger with the current code. Diff below properly initializes it.

OK?

martijn@

Index: application.c
===================================================================
RCS file: /cvs/src/usr.sbin/snmpd/application.c,v
retrieving revision 1.3
diff -u -p -r1.3 application.c
--- application.c       22 Feb 2022 15:59:13 -0000      1.3
+++ application.c       27 Jun 2022 10:10:37 -0000
@@ -224,6 +224,7 @@ appl_region(struct appl_context *ctx, ui
                goto overlap;
 
        /* Don't use smi_oid2string, because appl_register can't use it */
+       oidbuf[0] = '\0';
        for (i = 0; i < oid->bo_n; i++) {
                if (i != 0)
                        strlcat(oidbuf, ".", sizeof(oidbuf));