Re: [PATCH 1/2] Fonts: Support FONT_EXTRA_WORDS macros for font_6x8

[Peilin Ye]

On Sun, Oct 18, 2020 at 10:09:06PM +0200, Daniel Vetter wrote:
> Adding dri-devel too, not sure anyone is still listening on linux-fbdev.

I see, thanks!

> On Sun, Oct 18, 2020 at 8:13 PM Peilin Ye <yepeilin.cs@xxxxxxxxx> wrote:
> >
> > 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@xxxxxxxxx>
> 
> Patch looks good to me, but it says 1/2 and I can't find 2/2 anywhere,
> not even on lore. Did that get lost?

2/2 is just updating the fb documentation:

[PATCH 2/2] docs: fb: Add font_6x8 to available built-in fonts
https://lore.kernel.org/lkml/717bb41dda8e2ed615f3faadfbc3e215de726d38.1603037079.git.yepeilin.cs@xxxxxxxxx/

I did `git format-patch -2 --thread=deep`, did I do something wrong when
sending it?

Thank you,
Peilin Ye