From 8546e3ce6e37c359979b69862442f94e0ef0e03b Mon Sep 17 00:00:00 2001
From: Krzysztof Helt <krzysztof.h1@wp.pl>
Date: Sat, 24 Oct 2009 17:18:23 +0200
Subject: [PATCH] fbdev: atafb - add palette register check
Add check if palette register number is in correct range
for few drivers which miss it. The regno value comes
indirectly from user space.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
drivers/video/atafb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/video/atafb.c b/drivers/video/atafb.c
index 37624f74e88b..b7687c55fe16 100644
--- a/drivers/video/atafb.c
+++ b/drivers/video/atafb.c
@@ -2242,6 +2242,9 @@ static int ext_setcolreg(unsigned int regno, unsigned int red,
if (!external_vgaiobase)
return 1;
+ if (regno > 255)
+ return 1;
+
switch (external_card_type) {
case IS_VGA:
OUTB(0x3c8, regno);
--
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