This is a note to let you know that I've just added the patch titled
video: fbdev: aty: do not leak uninitialized padding in clk to userspace
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
video-fbdev-aty-do-not-leak-uninitialized-padding-in-clk-to-userspace.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8e75f7a7a00461ef6d91797a60b606367f6e344d Mon Sep 17 00:00:00 2001
From: Vladis Dronov <vdronov@xxxxxxxxxx>
Date: Mon, 4 Sep 2017 16:00:50 +0200
Subject: video: fbdev: aty: do not leak uninitialized padding in clk to userspace
From: Vladis Dronov <vdronov@xxxxxxxxxx>
commit 8e75f7a7a00461ef6d91797a60b606367f6e344d upstream.
'clk' is copied to a userland with padding byte(s) after 'vclk_post_div'
field unitialized, leaking data from the stack. Fix this ensuring all of
'clk' is initialized to zero.
References: https://github.com/torvalds/linux/pull/441
Reported-by: sohu0106 <sohu0106@xxxxxxx>
Signed-off-by: Vladis Dronov <vdronov@xxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/video/fbdev/aty/atyfb_base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/video/fbdev/aty/atyfb_base.c
+++ b/drivers/video/fbdev/aty/atyfb_base.c
@@ -1861,7 +1861,7 @@ static int atyfb_ioctl(struct fb_info *i
#if defined(DEBUG) && defined(CONFIG_FB_ATY_CT)
case ATYIO_CLKR:
if (M64_HAS(INTEGRATED)) {
- struct atyclk clk;
+ struct atyclk clk = { 0 };
union aty_pll *pll = &par->pll;
u32 dsp_config = pll->ct.dsp_config;
u32 dsp_on_off = pll->ct.dsp_on_off;
Patches currently in stable-queue which might be from vdronov@xxxxxxxxxx are
queue-4.4/nl80211-check-for-the-required-netlink-attributes-presence.patch
queue-4.4/video-fbdev-aty-do-not-leak-uninitialized-padding-in-clk-to-userspace.patch