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Fixed infinite loop on error bug while reading interface exception file (3.21.x) #5359

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Nov 3, 2023
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10 changes: 9 additions & 1 deletion libenv/unix_iface.c
Original file line number Diff line number Diff line change
Expand Up @@ -849,7 +849,15 @@ static void InitIgnoreInterfaces()
while (!feof(fin))
{
regex[0] = '\0';
int scanCount = fscanf(fin,"%255s",regex);
int scanCount = fscanf(fin, "%255s", regex);
if (ferror(fin) != 0)
{
Log(LOG_LEVEL_ERR,
"Failed to read interface exception file %s: %s",
filename,
GetErrorStr());
break;
}

if (scanCount != 0 && *regex != '\0')
{
Expand Down