From: Brett Gordon <beretta42@gmail.com>
Date: Fri, 23 Oct 2015 06:18:36 +0000 (-0400)
Subject: dragon-nx32: graphics: fix bounds checking for reading/writing
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=c1a05dc44ef59f5aedf4887fbe4299b54c4759ca;p=FUZIX.git

dragon-nx32: graphics: fix bounds checking for reading/writing

axis where swapped.
---

diff --git a/Kernel/platform-dragon-nx32/devtty.c b/Kernel/platform-dragon-nx32/devtty.c
index 28d22540..1766f7f3 100644
--- a/Kernel/platform-dragon-nx32/devtty.c
+++ b/Kernel/platform-dragon-nx32/devtty.c
@@ -370,8 +370,8 @@ static int gfx_draw_op(uarg_t arg, char *ptr, uint8_t *buf)
     if (l < 8)
       return EINVAL;
     l -= 8;
-    if (p[0] > 31 || p[1] > 191 || p[2] > 31 || p[3] > 191 ||
-      p[0] + p[2] > 32 || p[1] + p[3] > 192 ||
+    if (p[0] > 191 || p[1] > 31 || p[2] > 191 || p[3] > 31 ||
+      p[0] + p[2] > 192 || p[1] + p[3] > 32 ||
       (p[2] * p[3]) > l)
       return -EFAULT;
     if (arg == GFXIOC_READ) {