From d301524772be3eef5fae1bcd5ca76fac69bb3b6e Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Sat, 11 Mar 2006 03:27:26 -0800 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/intelfb/intelfbdrv.c | 50 ++++++++++++++++-------------- 1 file changed, 26 insertions(+), 24 deletions(-) diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c index 6b8bd3cdf9c0..995b47c165a7 100644 --- a/drivers/video/intelfb/intelfbdrv.c +++ b/drivers/video/intelfb/intelfbdrv.c @@ -1333,33 +1333,35 @@ intelfb_setcolreg(unsigned regno, unsigned red, unsigned green, 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); + } - 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; } - 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; } + return 0; } -- 2.20.1