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dragon-nx32: graphics: fix bounds checking for reading/writing
author
Brett Gordon
<beretta42@gmail.com>
Fri, 23 Oct 2015 06:18:36 +0000
(
02:18
-0400)
committer
Brett Gordon
<beretta42@gmail.com>
Fri, 23 Oct 2015 06:18:36 +0000
(
02:18
-0400)
axis where swapped.
Kernel/platform-dragon-nx32/devtty.c
patch
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diff --git
a/Kernel/platform-dragon-nx32/devtty.c
b/Kernel/platform-dragon-nx32/devtty.c
index
28d2254
..
1766f7f
100644
(file)
--- 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] > 19
1 ||
- p[0] + p[2] >
32 || p[1] + p[3] > 19
2 ||
+ if (p[0] >
191 || p[1] > 31 || p[2] > 191 || p[3] > 3
1 ||
+ p[0] + p[2] >
192 || p[1] + p[3] > 3
2 ||
(p[2] * p[3]) > l)
return -EFAULT;
if (arg == GFXIOC_READ) {