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authorAntonino A. Daplas <adaplas@gmail.com>2007-07-17 04:05:41 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 10:23:12 -0700
commit973d9ab231a6b9feb1ff5b9a072f11756eca96cc (patch)
treefefef9f4bd86989579a8b6496dfc09faba19acf8 /drivers/video/tridentfb.c
parenteb3daa83c2f63743fb7597f620beac75e1ba5633 (diff)
tridentfb: fix pseudo_palette array overrun in setcolreg
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>
Diffstat (limited to 'drivers/video/tridentfb.c')
-rw-r--r--drivers/video/tridentfb.c30
1 files changed, 16 insertions, 14 deletions
diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c
index 55e8aa450bfa..c699864b6f4a 100644
--- a/drivers/video/tridentfb.c
+++ b/drivers/video/tridentfb.c
@@ -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;
-
- 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);
+ } 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);
+ }
// debug("exit\n");
return 0;