From: Alan Cox <alan@etchedpixels.co.uk>
Date: Sat, 15 Nov 2014 13:56:39 +0000 (+0000)
Subject: usermem: fix error handling
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=0b7e5936eb3c2939b64eac1161dd21c905fbc5c6;p=FUZIX.git

usermem: fix error handling
---

diff --git a/Kernel/usermem.c b/Kernel/usermem.c
index 0cbec967..fae355d6 100644
--- a/Kernel/usermem.c
+++ b/Kernel/usermem.c
@@ -13,7 +13,7 @@ usize_t valaddr(const char *base, usize_t size)
 {
 	if (base < (const char *)PROGBASE || base + size < base)
 		size = 0;
-	if (base + size > (const char *)udata.u_top)
+	else if (base + size > (const char *)udata.u_top)
 		size = (char *)udata.u_top - base;
 	if (size == 0)
 		udata.u_error = EFAULT;