FIX, Coverity, Argument can't be negative, CID #212324, ftell(f) can be negative...

diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c
index 86524cd6c51e049f9fef6de36a6d945e9bd8dc71..5f45ab1aeed09d304b1db0d91cc70bf4a54849d2 100644 (file)
--- a/client/cmdhficlass.c
+++ b/client/cmdhficlass.c
@@ -1316,8 +1316,13 @@ int CmdHFiClassReadTagFile(const char *Cmd) {
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 
-       uint8_t *dump = malloc(fsize);
+       if ( fsize < 0 ) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }
 
+       uint8_t *dump = malloc(fsize);
 
        size_t bytes_read = fread(dump, 1, fsize, f);
        fclose(f);