From: Salva Peiró Date: Wed, 7 Oct 2015 10:09:26 +0000 (-0300) Subject: media/vivid-osd: fix info leak in ioctl X-Git-Tag: v4.3.5~8 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=42debcb0815cfdf8c1a5e5c40eb71f6c2547c432;p=thirdparty%2Fkernel%2Fstable.git media/vivid-osd: fix info leak in ioctl commit eda98796aff0d9bf41094b06811f5def3b4c333c upstream. The vivid_fb_ioctl() code fails to initialize the 16 _reserved bytes of struct fb_vblank after the ->hcount member. Add an explicit memset(0) before filling the structure to avoid the info leak. Signed-off-by: Salva Peiró Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/media/platform/vivid/vivid-osd.c b/drivers/media/platform/vivid/vivid-osd.c index 084d346fb4c4f..e15eef6a94e55 100644 --- a/drivers/media/platform/vivid/vivid-osd.c +++ b/drivers/media/platform/vivid/vivid-osd.c @@ -85,6 +85,7 @@ static int vivid_fb_ioctl(struct fb_info *info, unsigned cmd, unsigned long arg) case FBIOGET_VBLANK: { struct fb_vblank vblank; + memset(&vblank, 0, sizeof(vblank)); vblank.flags = FB_VBLANK_HAVE_COUNT | FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VSYNC; vblank.count = 0;