ksmbd: fix memleak in get_file_stream_info()

namjaejeon · smfrench · commit 178ca6f85aa3 · 2021-11-25T00:09:26.000-06:00
Fix memleak in get_file_stream_info() Fixes: 34061d6 ("ksmbd: validate OutputBufferLength of QUERY_DIR, QUERY_INFO, IOCTL requests") Cc: stable@vger.kernel.org # v5.15 Reported-by: Coverity Scan <scan-admin@coverity.com> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
@@ -4498,8 +4498,10 @@ static void get_file_stream_info(struct ksmbd_work *work,
 				     ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
 
 		next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
-		if (next > buf_free_len)
+		if (next > buf_free_len) {
+			kfree(stream_buf);
 			break;
+		}
 
 		file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
 		streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
