smb2: improve write error handling

rust/src/smb/smb2.rs

@@ -527,7 +527,9 @@ pub fn smb2_response_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>)
             true
         },
         SMB2_COMMAND_WRITE => {
-            match parse_smb2_response_write(r.data) {
+            if r.nt_status == SMB_NTSTATUS_SUCCESS {
+                match parse_smb2_response_write(r.data)
+                {
                     IResult::Done(_, wr) => {
                         SCLogDebug!("SMBv2: Write response => {:?}", wr);
 
@@ -547,6 +549,7 @@ pub fn smb2_response_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>)
                         events.push(SMBEvent::MalformedData);
                     },
                 }
+            }
             false // the request may have created a generic tx, so handle that here
         },
         SMB2_COMMAND_READ => {
@@ -686,9 +689,7 @@ pub fn smb2_response_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>)
                             tx.response_done = true;
                             true
                         },
-                        None => {
-                           false
-                        },
+                        None => { false },
                     };
                     found1 || found2
                 },