forked from Lainports/opnsense-ports
8cb1a96ede
Taken from: https://github.com/freebsd/freebsd-ports.git Commit id: 5070672073b68be364139bc6b3a89100bd17d331
24 lines
722 B
C
24 lines
722 B
C
--- control.c.orig.o Thu Apr 11 00:09:33 2002
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+++ control.c Tue Aug 9 13:20:07 2005
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@@ -16,8 +16,6 @@
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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-#include <netinet/in.h>
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-#include <arpa/inet.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "l2tp.h"
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@@ -1582,6 +1580,12 @@
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wbuf[pos++] = e;
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for (x = 0; x < buf->len; x++)
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{
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+ // we must at least still have 3 bytes left in the worst case scenario:
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+ // 1 for a possible escape, 1 for the value and 1 to end the PPP stream.
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+ if(pos >= (sizeof(wbuf) - 4)) {
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+ return -EINVAL;
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+ }
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+
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e = *((char *) buf->start + x);
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if ((e < 0x20) || (e == PPP_ESCAPE) || (e == PPP_FLAG))
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{
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