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stop parsing a truncated zip in reseed instead of looping forever

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PobreGato
2026-08-31 02:33:05 +03:00
parent 9e342ffd72
commit 9ef68e2d93
1 changed files with 10 additions and 3 deletions
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libi2pd/Reseed.cpp
+10 -3
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@@ -330,7 +330,9 @@ namespace data
{
int numFiles = 0;
size_t contentPos = s.tellg ();
while (!s.eof ())
// not !eof: seekg clears eofbit, so a stream broken in the middle of a
// header stays not-eof forever and the loop never ends
while (s.good ())
{
uint32_t signature;
s.read ((char *)&signature, 4);
@@ -357,13 +359,18 @@ namespace data
uint16_t fileNameLength, extraFieldLength;
s.read ((char *)&fileNameLength, 2);
fileNameLength = le16toh (fileNameLength);
s.read ((char *)&extraFieldLength, 2);
extraFieldLength = le16toh (extraFieldLength);
if (!s.good ())
{
LogPrint (eLogError, "Reseed: Truncated zip local file header");
return numFiles;
}
if ( fileNameLength >= 255 ) {
// too big
LogPrint(eLogError, "Reseed: SU3 fileNameLength too large: ", fileNameLength);
return numFiles;
}
s.read ((char *)&extraFieldLength, 2);
extraFieldLength = le16toh (extraFieldLength);
char localFileName[255];
s.read (localFileName, fileNameLength);
localFileName[fileNameLength] = 0;