clientDriverNameLength is a CARD32 and needs to be bounds checked before
adding one to it to come up with the total size to allocate, to avoid
integer overflow leading to underallocation and writing data from the
network past the end of the allocated buffer.
Reported-by: Ilja Van Sprundel <ivansprun...@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersm...@oracle.com>
---
src/glx/XF86dri.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/src/glx/XF86dri.c b/src/glx/XF86dri.c
index 8f53bd7..56e3557 100644
--- a/src/glx/XF86dri.c
+++ b/src/glx/XF86dri.c
@@ -305,9 +305,11 @@ XF86DRIGetClientDriverName(Display * dpy, int screen,
*ddxDriverPatchVersion = rep.ddxDriverPatchVersion;
if (rep.length) {
- if (!
- (*clientDriverName =
- calloc(rep.clientDriverNameLength + 1, 1))) {
+ if (rep.clientDriverNameLength < INT_MAX)
+ *clientDriverName = calloc(rep.clientDriverNameLength + 1, 1);
+ else
+ *clientDriverName = NULL;
+ if (*clientDriverName == NULL) {
_XEatData(dpy, ((rep.clientDriverNameLength + 3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
--
1.7.9.2
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
