9p/net: fix missing error check in p9_check_errors

Link: https://lkml.kernel.org/r/[email protected]
Reported-by: [email protected]
Cc: [email protected]
Signed-off-by: Dominique Martinet <[email protected]>

Author: martinetd

net/9p/client.c

@@ -541,6 +541,8 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
 		kfree(ename);
 	} else {
 		err = p9pdu_readf(&req->rc, c->proto_version, "d", &ecode);
+		if (err)
+			goto out_err;
 		err = -ecode;
 
 		p9_debug(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);