2018-01-05 21:43:02

by Nicolas Pitre

[permalink] [raw]
Subject: [PATCH] console/dummy: leave .con_font_get set to NULL


When this method is set, the caller expects struct console_font fields
to be properly initialized when it returns. Leave it unset otherwise
nonsensical (leaked kernel stack) values are returned to user space.

Signed-off-by: Nicolas Pitre <[email protected]>
Cc: [email protected]

diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index 9269d56852..b90ef96e43 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -67,7 +67,6 @@ const struct consw dummy_con = {
.con_switch = DUMMY,
.con_blank = DUMMY,
.con_font_set = DUMMY,
- .con_font_get = DUMMY,
.con_font_default = DUMMY,
.con_font_copy = DUMMY,
};


Subject: Re: [PATCH] console/dummy: leave .con_font_get set to NULL

On Friday, January 05, 2018 04:42:58 PM Nicolas Pitre wrote:
>
> When this method is set, the caller expects struct console_font fields
> to be properly initialized when it returns. Leave it unset otherwise
> nonsensical (leaked kernel stack) values are returned to user space.
>
> Signed-off-by: Nicolas Pitre <[email protected]>
> Cc: [email protected]

Please check your patches with tools/checkpatch.pl script:

ERROR: The 'stable' address should be '[email protected]'
#9:
Cc: [email protected]

After updating this I queued the patch for 4.16, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

2018-01-15 16:46:10

by Nicolas Pitre

[permalink] [raw]
Subject: Re: [PATCH] console/dummy: leave .con_font_get set to NULL

On Mon, 15 Jan 2018, Bartlomiej Zolnierkiewicz wrote:

> On Friday, January 05, 2018 04:42:58 PM Nicolas Pitre wrote:
> >
> > When this method is set, the caller expects struct console_font fields
> > to be properly initialized when it returns. Leave it unset otherwise
> > nonsensical (leaked kernel stack) values are returned to user space.
> >
> > Signed-off-by: Nicolas Pitre <[email protected]>
> > Cc: [email protected]
>
> Please check your patches with tools/checkpatch.pl script:
>
> ERROR: The 'stable' address should be '[email protected]'
> #9:
> Cc: [email protected]

Oops. I cut and pasted it it from commit ea0ee33988778fb73e4f4. ;-)


Nicolas