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| author | Antonino A. Daplas <adaplas@gmail.com> | 2005-11-07 10:00:40 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-07 16:53:51 +0100 |
| commit | eba50850458cf6e907b6b751cb18711666819406 (patch) | |
| tree | 01e72b4d850432778e2620c152d1acec2a8a3851 /drivers/video | |
| parent | [PATCH] fbdev: Remove software clipping from drawing functions (diff) | |
| download | linux-eba50850458cf6e907b6b751cb18711666819406.tar.xz linux-eba50850458cf6e907b6b751cb18711666819406.zip | |
[PATCH] vesafb: Fix color palette handling
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>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/vesafb.c | 56 |
1 files changed, 25 insertions, 31 deletions
diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c index 4f02615225ac..67e215443953 100644 --- a/drivers/video/vesafb.c +++ b/drivers/video/vesafb.c @@ -166,45 +166,39 @@ 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; - case 16: - if (info->var.red.offset == 10) { - /* 1:5:5:5 */ - ((u32*) (info->pseudo_palette))[regno] = + else if (regno < 16) { + switch (info->var.bits_per_pixel) { + case 16: + if (info->var.red.offset == 10) { + /* 1:5:5:5 */ + ((u32*) (info->pseudo_palette))[regno] = ((red & 0xf800) >> 1) | ((green & 0xf800) >> 6) | ((blue & 0xf800) >> 11); - } else { - /* 0:5:6:5 */ - ((u32*) (info->pseudo_palette))[regno] = + } else { + /* 0:5:6:5 */ + ((u32*) (info->pseudo_palette))[regno] = ((red & 0xf800) ) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); + } + break; + case 24: + case 32: + 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; } - 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; - blue >>= 8; - ((u32 *)(info->pseudo_palette))[regno] = - (red << info->var.red.offset) | - (green << info->var.green.offset) | - (blue << info->var.blue.offset); - break; - } - return 0; + } + + return 0; } static struct fb_ops vesafb_ops = { |