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-rw-r--r--drivers/video/atafb.c3
1 files changed, 3 insertions, 0 deletions
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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