Author: emaste
Date: Mon Jan 21 16:19:02 2019
New Revision: 343260
URL: https://svnweb.freebsd.org/changeset/base/343260
Log:
linuxulator: fix stack memory disclosure in linux_ioctl_v4l
admbugs: 765
Reported by: Vlad Tsyrklevich <v...@tsyrklevich.net>
Reviewed by: andrew
MFC after: 1 day
Security: Kernel stack memory disclosure
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/compat/linux/linux_ioctl.c
Modified: head/sys/compat/linux/linux_ioctl.c
==============================================================================
--- head/sys/compat/linux/linux_ioctl.c Mon Jan 21 15:27:58 2019
(r343259)
+++ head/sys/compat/linux/linux_ioctl.c Mon Jan 21 16:19:02 2019
(r343260)
@@ -2843,6 +2843,8 @@ linux_to_bsd_v4l_window(struct l_video_window *lvw, st
static int
bsd_to_linux_v4l_window(struct video_window *vw, struct l_video_window *lvw)
{
+ memset(lvw, 0, sizeof(*lvw));
+
lvw->x = vw->x;
lvw->y = vw->y;
lvw->width = vw->width;
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