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tridentfb: fix pseudo_palette array overrun in setcolreg

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The pseudo_palette has only 16 elements. Do not write if regno (the array
index) is more than 15.

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonino A. Daplas 2007-07-17 04:05:41 -07:00 committed by Linus Torvalds
parent eb3daa83c2
commit 973d9ab231
1 changed files with 15 additions and 13 deletions
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28
drivers/video/tridentfb.c
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@ -976,7 +976,7 @@ static int tridentfb_setcolreg(unsigned regno, unsigned red, unsigned green,
return 1;
if (bpp==8) {
if (bpp == 8) {
t_outb(0xFF,0x3C6);
t_outb(regno,0x3C8);
@ -984,19 +984,21 @@ static int tridentfb_setcolreg(unsigned regno, unsigned red, unsigned green,
t_outb(green>>10,0x3C9);
t_outb(blue>>10,0x3C9);
} else if (bpp == 16) { /* RGB 565 */
u32 col;
} else if (regno < 16) {
if (bpp == 16) { /* RGB 565 */
u32 col;
col = (red & 0xF800) | ((green & 0xFC00) >> 5) |
((blue & 0xF800) >> 11);
col |= col << 16;
((u32 *)(info->pseudo_palette))[regno] = col;
} else if (bpp == 32) /* ARGB 8888 */
((u32*)info->pseudo_palette)[regno] =
((transp & 0xFF00) <<16) |
((red & 0xFF00) << 8) |
((green & 0xFF00)) |
((blue & 0xFF00)>>8);
col = (red & 0xF800) | ((green & 0xFC00) >> 5) |
((blue & 0xF800) >> 11);
col |= col << 16;
((u32 *)(info->pseudo_palette))[regno] = col;
} else if (bpp == 32) /* ARGB 8888 */
((u32*)info->pseudo_palette)[regno] =
((transp & 0xFF00) <<16) |
((red & 0xFF00) << 8) |
((green & 0xFF00)) |
((blue & 0xFF00)>>8);
}
// debug("exit\n");
return 0;