From 973d9ab231a6b9feb1ff5b9a072f11756eca96cc Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Tue, 17 Jul 2007 04:05:41 -0700 Subject: [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/tridentfb.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c index 55e8aa450b..c699864b6f 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; -- 2.39.5