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-rw-r--r--drivers/tty/vt/vt.c28
-rw-r--r--drivers/video/console/vgacon.c2
-rw-r--r--drivers/video/fbdev/core/fbcon.c2
3 files changed, 19 insertions, 13 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 8da7ab34b8fd..57a5c23b51d4 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -4523,17 +4523,20 @@ void reset_palette(struct vc_data *vc)
/*
* Font switching
*
- * Currently we only support fonts up to 32 pixels wide, at a maximum height
- * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
- * depending on width) reserved for each character which is kinda wasty, but
- * this is done in order to maintain compatibility with the EGA/VGA fonts. It
- * is up to the actual low-level console-driver convert data into its favorite
- * format (maybe we should add a `fontoffset' field to the `display'
- * structure so we won't have to convert the fontdata all the time.
+ * Currently we only support fonts up to 128 pixels wide, at a maximum height
+ * of 128 pixels. Userspace fontdata may have to be stored with 32 bytes
+ * (shorts/ints, depending on width) reserved for each character which is
+ * kinda wasty, but this is done in order to maintain compatibility with the
+ * EGA/VGA fonts. It is up to the actual low-level console-driver convert data
+ * into its favorite format (maybe we should add a `fontoffset' field to the
+ * `display' structure so we won't have to convert the fontdata all the time.
* /Jes
*/
-#define max_font_size 65536
+#define max_font_width 64
+#define max_font_height 128
+#define max_font_glyphs 512
+#define max_font_size (max_font_glyphs*max_font_width*max_font_height)
static int con_font_get(struct vc_data *vc, struct console_font_op *op)
{
@@ -4543,7 +4546,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
unsigned int vpitch = op->op == KD_FONT_OP_GET_TALL ? op->height : 32;
if (op->data) {
- font.data = kmalloc(max_font_size, GFP_KERNEL);
+ font.data = kvmalloc(max_font_size, GFP_KERNEL);
if (!font.data)
return -ENOMEM;
} else
@@ -4578,7 +4581,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
rc = -EFAULT;
out:
- kfree(font.data);
+ kvfree(font.data);
return rc;
}
@@ -4593,9 +4596,10 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
return -EINVAL;
if (!op->data)
return -EINVAL;
- if (op->charcount > 512)
+ if (op->charcount > max_font_glyphs)
return -EINVAL;
- if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
+ if (op->width <= 0 || op->width > max_font_width || !op->height ||
+ op->height > max_font_height)
return -EINVAL;
if (vpitch < op->height)
return -EINVAL;
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index 03c2cce71c0c..e25ba523892e 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -1037,7 +1037,7 @@ static int vgacon_font_set(struct vc_data *c, struct console_font *font,
if (vga_video_type < VIDEO_TYPE_EGAM)
return -EINVAL;
- if (font->width != VGA_FONTWIDTH || vpitch != 32 ||
+ if (font->width != VGA_FONTWIDTH || font->height > 32 || vpitch != 32 ||
(charcount != 256 && charcount != 512))
return -EINVAL;
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 7cd7346bbc9a..5fb670b6f9a7 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2279,6 +2279,8 @@ static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigne
font->width = vc->vc_font.width;
font->height = vc->vc_font.height;
+ if (font->height > vpitch)
+ return -ENOSPC;
font->charcount = vc->vc_hi_font_mask ? 512 : 256;
if (!font->data)
return 0;