smb3 client: warn when parse contexts returns error on compounded operation

JIRA: https://issues.redhat.com/browse/RHEL-96872

commit d90b023
Author: Steve French <[email protected]>
Date:   Sun May 4 18:26:45 2025 -0500

    smb3 client: warn when parse contexts returns error on compounded operation
    
    Coverity noticed that the rc on smb2_parse_contexts() was not being checked
    in the case of compounded operations.  Since we don't want to stop parsing
    the following compounded responses which are likely valid, we can't easily
    error out here, but at least print a warning message if server has a bug
    causing us to skip parsing the open response contexts.
    
    Addresses-Coverity: 1639191
    Acked-by: Paulo Alcantara (Red Hat) <[email protected]>
    Signed-off-by: Steve French <[email protected]>

Signed-off-by: Paulo Alcantara <[email protected]>

Author: pcacjr

fs/smb/client/smb2inode.c

@@ -666,6 +666,8 @@ static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 		/* smb2_parse_contexts() fills idata->fi.IndexNumber */
 		rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch,
 					 oparms->fid->lease_key, &oplock, &idata->fi, NULL);
+		if (rc)
+			cifs_dbg(VFS, "rc: %d parsing context of compound op\n", rc);
 	}
 
 	for (i = 0; i < num_cmds; i++) {