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video: fbdev: aty: do not leak uninitialized padding in clk to userspace

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'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@126.com>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
This commit is contained in:
Vladis Dronov 2017-09-04 16:00:50 +02:00 committed by Bartlomiej Zolnierkiewicz
parent b9a58de545
commit 8e75f7a7a0
1 changed files with 1 additions and 1 deletions
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2
drivers/video/fbdev/aty/atyfb_base.c
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@ -1855,7 +1855,7 @@ static int atyfb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
#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;