From: Dave Airlie <airlied@linux.ie>
Date: Tue, 8 Mar 2005 23:47:11 +0000 (+0000)
Subject: Fix for bug 2673 from Egbert Eich - memset the version
X-Git-Tag: submit/1.0/20121108.012404~1782
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7d3c42b58940b56efa9bfc13a08b5e67797fc771;p=profile%2Fivi%2Flibdrm.git

Fix for bug 2673 from Egbert Eich - memset the version
---

diff --git a/linux-core/drm_ioctl.c b/linux-core/drm_ioctl.c
index b8ed5a7..24f6579 100644
--- a/linux-core/drm_ioctl.c
+++ b/linux-core/drm_ioctl.c
@@ -328,6 +328,14 @@ int drm_setversion(DRM_IOCTL_ARGS)
  
 	DRM_COPY_FROM_USER_IOCTL(sv, argp, sizeof(sv));
 
+	/*
+	 * version.name etc need to be initialized to zero.
+	 * If we don't, driver->version() will poke random strings to
+	 * random locations in user space, causing X server segfaults
+	 * that are interesting to debug.   --eich
+	 */
+	memset(&version, 0, sizeof(version));
+
 	dev->driver->version(&version);
 	retv.drm_di_major = DRM_IF_MAJOR;
 	retv.drm_di_minor = DRM_IF_MINOR;