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authorPeilin Ye <yepeilin.cs@gmail.com>2020-10-18 14:12:04 -0400
committerDaniel Vetter <daniel.vetter@ffwll.ch>2020-10-19 17:55:10 +0200
commit272d70895113ef00c03ab325787d159ee51718c8 (patch)
treeee4f32c725d8d14728b529769d1aef834c93042a /lib
parenteda4a7bf5d75b8b579c54622f2795696a02883b9 (diff)
Fonts: Support FONT_EXTRA_WORDS macros for font_6x8
Recently, in commit 6735b4632def ("Fonts: Support FONT_EXTRA_WORDS macros for built-in fonts"), we wrapped each of our built-in data buffers in a `font_data` structure, in order to use the following macros on them, see include/linux/font.h: #define REFCOUNT(fd) (((int *)(fd))[-1]) #define FNTSIZE(fd) (((int *)(fd))[-2]) #define FNTCHARCNT(fd) (((int *)(fd))[-3]) #define FNTSUM(fd) (((int *)(fd))[-4]) #define FONT_EXTRA_WORDS 4 Do the same thing to our new 6x8 font. For built-in fonts, currently we only use FNTSIZE(). Since this is only a temporary solution for an out-of-bounds issue in the framebuffer layer (see commit 5af08640795b ("fbcon: Fix global-out-of-bounds read in fbcon_get_font()")), all the three other fields are intentionally set to zero in order to discourage using these negative-indexing macros. Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/926453876c92caac34cba8545716a491754d04d5.1603037079.git.yepeilin.cs@gmail.com
Diffstat (limited to 'lib')
-rw-r--r--lib/fonts/font_6x8.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/fonts/font_6x8.c b/lib/fonts/font_6x8.c
index e06447788418..700039a9ceae 100644
--- a/lib/fonts/font_6x8.c
+++ b/lib/fonts/font_6x8.c
@@ -3,8 +3,8 @@
#define FONTDATAMAX 2048
-static const unsigned char fontdata_6x8[FONTDATAMAX] = {
-
+static struct font_data fontdata_6x8 = {
+ { 0, 0, FONTDATAMAX, 0 }, {
/* 0 0x00 '^@' */
0x00, /* 000000 */
0x00, /* 000000 */
@@ -2564,13 +2564,13 @@ static const unsigned char fontdata_6x8[FONTDATAMAX] = {
0x00, /* 000000 */
0x00, /* 000000 */
0x00, /* 000000 */
-};
+} };
const struct font_desc font_6x8 = {
.idx = FONT6x8_IDX,
.name = "6x8",
.width = 6,
.height = 8,
- .data = fontdata_6x8,
+ .data = fontdata_6x8.data,
.pref = 0,
};

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