Commit dd2351da authored Sep 18, 2011 by Rob Clark Committed by Dave Airlie Oct 19, 2011

drm: drm_ioctl() should zero-init extra data



If an older userspace passes in a smaller arg than the current kernel
ioctl arg struct, then extra fields should be initialized to zero
rather than passing random data to the DRM driver.

Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

parent 017ed801

drivers/gpu/drm/drm_drv.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -438,6 +438,8 @@ long drm_ioctl(struct file *filp,
	goto err_i1;		goto err_i1;
	}		}
	}		}
			if (asize > usize)
			memset(kdata + usize, 0, asize - usize);
	}		}

	if (cmd & IOC_IN) {		if (cmd & IOC_IN) {