[util] Avoid calling fclose(NULL) in zbin.c

Must check that argument to a fclose() is not NULL -- we can get to the 'err' label when file was not opened. fclose(NULL) is known to produce core dump on some platforms and we don't want zbin to fail so loudly. Signed-off-by: Eygene Ryabinkin <rea-fbsd@codelabs.ru>
ipxe · Sep 4, 2008 · 6de45ad · 6de45ad
1 parent 99251f5
commit 6de45ad
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/util/zbin.c b/src/util/zbin.c
@@ -90,7 +90,8 @@ static int read_file ( const char *filename, void **buf, size_t *len ) {
 	return 0;
 
  err:
-	fclose ( file );
+	if ( file )
+		fclose ( file );
 	return -1;
 }