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Prevent a buffer overflow in cardreader

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Alex 2018-06-03 13:32:40 +02:00 committed by Scott Lahteine
parent 3be22fc1fc
commit 3bc392f592
1 changed files with 1 additions and 2 deletions
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Marlin/cardreader.cpp
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@ -582,9 +582,8 @@ const char* CardReader::diveToFile(SdFile*& curDir, const char * const path, con
while (dirname_start) { while (dirname_start) {
char * const dirname_end = strchr(dirname_start, '/'); char * const dirname_end = strchr(dirname_start, '/');
if (dirname_end <= dirname_start) break; if (dirname_end <= dirname_start) break;
char dosSubdirname[FILENAME_LENGTH];
const uint8_t len = dirname_end - dirname_start; const uint8_t len = dirname_end - dirname_start;
char dosSubdirname[len + 1];
strncpy(dosSubdirname, dirname_start, len); strncpy(dosSubdirname, dirname_start, len);
dosSubdirname[len] = 0; dosSubdirname[len] = 0;