From ddb748a973bdcb84c6a0ab21e5fcd2b964e5c2e5 Mon Sep 17 00:00:00 2001
From: iceman1001 <iceman@iuse.se>
Date: Tue, 12 Jan 2016 22:49:29 +0100
Subject: [PATCH] FIX, Coverity, Argument can't be negative,  CID #212324, 
 ftell(f) can be negative,  not allowed in malloc.

---
 client/cmdhficlass.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c
index 86524cd6..5f45ab1a 100644
--- 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);
-- 
2.39.5