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[PATCH] vesafb: Fix color palette handling

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Fix out-of-bounds bug.  The pseudopalette has room only for 16 entries, thus,
write only the first 16 entries to the pseudopalette.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Antonino A. Daplas 2005-11-07 01:00:40 -08:00 committed by Linus Torvalds
parent b4d8aea6d6
commit eba5085045
1 changed files with 25 additions and 31 deletions
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16
drivers/video/vesafb.c
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@ -166,10 +166,10 @@ static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
if (regno >= info->cmap.len)
return 1;
switch (info->var.bits_per_pixel) {
case 8:
if (info->var.bits_per_pixel == 8)
vesa_setpalette(regno,red,green,blue);
break;
else if (regno < 16) {
switch (info->var.bits_per_pixel) {
case 16:
if (info->var.red.offset == 10) {
/* 1:5:5:5 */
@ -186,14 +186,6 @@ static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
}
break;
case 24:
red >>= 8;
green >>= 8;
blue >>= 8;
((u32 *)(info->pseudo_palette))[regno] =
(red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset);
break;
case 32:
red >>= 8;
green >>= 8;
@ -204,6 +196,8 @@ static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
(blue << info->var.blue.offset);
break;
}
}
return 0;
}