4.13-stable review patch. If anyone has any objections, please let me know. ------------------ 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 @@ -1855,7 +1855,7 @@ 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;