From 38b4982c6388ae9596f959e3d7fef91affbd181d Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Tue, 8 May 2007 00:39:19 -0700 Subject: [PATCH] fbcon: check if the character count can be handled Fontmaps can be 256 or 512 in length. The only driver that can do tileblitting can only handle 256 characters. Check for this when setting the font. Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/console/fbcon.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index c71a88d531c..6fc3501581d 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -685,6 +685,17 @@ static void set_blitting_type(struct vc_data *vc, struct fb_info *info) fbcon_set_bitops(ops); } } + +static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) +{ + int err = 0; + + if (info->flags & FBINFO_MISC_TILEBLITTING && + info->tileops->fb_get_tilemax(info) < charcount) + err = 1; + + return err; +} #else static void set_blitting_type(struct vc_data *vc, struct fb_info *info) { @@ -695,6 +706,12 @@ static void set_blitting_type(struct vc_data *vc, struct fb_info *info) fbcon_set_rotation(info); fbcon_set_bitops(ops); } + +static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) +{ + return 0; +} + #endif /* CONFIG_MISC_TILEBLITTING */ @@ -2518,6 +2535,10 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigne !(info->pixmap.blit_y & (1 << (font->height - 1)))) return -EINVAL; + /* Make sure driver can handle the font length */ + if (fbcon_invalid_charcount(info, charcount)) + return -EINVAL; + size = h * pitch * charcount; new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); -- 2.20.1