Mesa (master): mesa: check for bufSize > 0 in _mesa_GetSynciv()

[Brian Paul]

Module: Mesa
Branch: master
Commit: 6659131be3bde0505a85e3a7d27382b273822bee
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6659131be3bde0505a85e3a7d27382b273822bee

Author: Brian Paul <brianp at vmware.com>
Date:   Sat Sep 14 10:09:24 2013 -0600

mesa: check for bufSize > 0 in _mesa_GetSynciv()

The spec doesn't say GL_INVALID_VALUE should be raised for bufSize <= 0.
In any case, memcpy(len < 0) will lead to a crash, so don't allow it.

CC: "9.2" <mesa-stable at lists.freedesktop.org>
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

---

 src/mesa/main/syncobj.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mesa/main/syncobj.c b/src/mesa/main/syncobj.c
index 27867a1..ad21f3b 100644
--- a/src/mesa/main/syncobj.c
+++ b/src/mesa/main/syncobj.c
@@ -418,7 +418,7 @@ _mesa_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length,
       return;
    }
 
-   if (size > 0) {
+   if (size > 0 && bufSize > 0) {
       const GLsizei copy_count = MIN2(size, bufSize);
 
       memcpy(values, v, sizeof(GLint) * copy_count);