Memory leak in tpm_ascii_bios_measurements_open()

Coverity found a memory leak in tpm_ascii_bios_measurements_open().

If "read_log(log)" fails, then we may leak 'log' and
'log->bios_event_log'.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: Seiji Munetoh <munetoh@jp.ibm.com>
Cc: Stefan Berger <stefanb@us.ibm.com>
Cc: Reiner Sailer <sailer@watson.ibm.com>
Cc: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/tpm/tpm_bios.c

@@ -427,18 +427,23 @@ static int tpm_ascii_bios_measurements_open(struct inode *inode,
 		return -ENOMEM;
 
 	if ((err = read_log(log)))
-		return err;
+		goto out_free;
 
 	/* now register seq file */
 	err = seq_open(file, &tpm_ascii_b_measurments_seqops);
 	if (!err) {
 		seq = file->private_data;
 		seq->private = log;
 	} else {
-		kfree(log->bios_event_log);
-		kfree(log);
+		goto out_free;
 	}
+
+out:
 	return err;
+out_free:
+	kfree(log->bios_event_log);
+	kfree(log);
+	goto out;
 }
 
 const struct file_operations tpm_ascii_bios_measurements_ops = {