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Fix buffer underflow when serial peer spews garbage #10

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Fix buffer underflow when serial peer spews garbage #10

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4 changes: 2 additions & 2 deletions mux.c
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Original file line number Diff line number Diff line change
Expand Up @@ -211,7 +211,7 @@ char *answerback;

static void write_receive_buf(const unsigned char *buf, int len)
{
if (!len)
if (len <= 0)
return;

write(STDOUT_FILENO, buf, len);
Expand Down Expand Up @@ -306,7 +306,7 @@ static int handle_receive_buf(struct ios_ops *ios, unsigned char *buf, int len)
unsigned char *sendbuf = buf;
int i;

while (len) {
while (len > 0) {
switch (*buf) {
case IAC:
/* BUG: this is telnet specific */
Expand Down