[PATCH] intelfb: Fix buffer overrun
The pseudo_palette has room only for 16 entries, but intelfb_setcolreg will
attempt to write more.
Coverity Bug 558
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c
index 6b8bd3c..995b47c 100644
--- a/drivers/video/intelfb/intelfbdrv.c
+++ b/drivers/video/intelfb/intelfbdrv.c
@@ -1333,33 +1333,35 @@
if (regno > 255)
return 1;
- switch (dinfo->depth) {
- case 8:
- {
- red >>= 8;
- green >>= 8;
- blue >>= 8;
+ if (dinfo->depth == 8) {
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
- intelfbhw_setcolreg(dinfo, regno, red, green, blue,
- transp);
- }
- break;
- case 15:
- dinfo->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
- ((green & 0xf800) >> 6) |
- ((blue & 0xf800) >> 11);
- break;
- case 16:
- dinfo->pseudo_palette[regno] = (red & 0xf800) |
- ((green & 0xfc00) >> 5) |
- ((blue & 0xf800) >> 11);
- break;
- case 24:
- dinfo->pseudo_palette[regno] = ((red & 0xff00) << 8) |
- (green & 0xff00) |
- ((blue & 0xff00) >> 8);
- break;
+ intelfbhw_setcolreg(dinfo, regno, red, green, blue,
+ transp);
}
+
+ if (regno < 16) {
+ switch (dinfo->depth) {
+ case 15:
+ dinfo->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
+ ((green & 0xf800) >> 6) |
+ ((blue & 0xf800) >> 11);
+ break;
+ case 16:
+ dinfo->pseudo_palette[regno] = (red & 0xf800) |
+ ((green & 0xfc00) >> 5) |
+ ((blue & 0xf800) >> 11);
+ break;
+ case 24:
+ dinfo->pseudo_palette[regno] = ((red & 0xff00) << 8) |
+ (green & 0xff00) |
+ ((blue & 0xff00) >> 8);
+ break;
+ }
+ }
+
return 0;
}
