commit 19b490b05442a0af495ceb73c131d4b516e773fe
Author: Oppen <mrugiero@gmail.com>
Date:   Tue Dec 3 00:37:43 2013 -0300

    Fix NULL dereference.

diff --git a/src/via_exa.c b/src/via_exa.c
index d78a770..1164e2c 100644
--- a/src/via_exa.c
+++ b/src/via_exa.c
@@ -217,7 +217,10 @@ viaSetupCBuffer(ScrnInfoPtr pScrn, ViaCommandBuffer *cb, unsigned size)
 static void
 viaTearDownCBuffer(ViaCommandBuffer *cb)
 {
-    if (cb && cb->buf)
+    if (!cb)
+        return;
+
+    if (cb->buf)
         free(cb->buf);
     cb->buf = NULL;
 }

commit 3c113fbc90c290a560f89bba0f6e1183c4f0f530
Author: Oppen <mrugiero@gmail.com>
Date:   Tue Dec 3 00:28:13 2013 -0300

    Fix double free.

diff --git a/src/via_driver.c b/src/via_driver.c
index 0f24ebe..352f89b 100644
--- a/src/via_driver.c
+++ b/src/via_driver.c
@@ -1026,7 +1026,9 @@ VIAPreInit(ScrnInfoPtr pScrn, int flags)
         pVia->ChipRev = pciReadByte(pciTag(0, 0, 0), 0xF6);
 #endif
     }
-    free(pEnt);
+
+    if (pEnt)
+        free(pEnt);
     xf86DrvMsg(pScrn->scrnIndex, from, "Chipset revision: %d\n", pVia->ChipRev);
 
     pVia->directRenderingType = DRI_NONE;

commit 151b7a1c884f2f84cb552346b7c8704faf9877b0
Author: Oppen <mrugiero@gmail.com>
Date:   Tue Dec 3 00:27:49 2013 -0300

    Fix NULL dereference.

diff --git a/src/via_3d.c b/src/via_3d.c
index 64f40ba..e2d04ff 100644
--- a/src/via_3d.c
+++ b/src/via_3d.c
@@ -257,8 +257,12 @@ viaSet3DCompositeOperator(Via3DState * v3d, CARD8 op)
 {
     ViaCompositeOperator *vOp = viaOperatorModes + op;
 
-    v3d->blendDirty = TRUE;
-    if (v3d && vOp->supported) {
+    if (v3d)
+        v3d->blendDirty = TRUE;
+    else
+        return;
+
+    if (vOp->supported) {
         v3d->blendCol0 = vOp->col0 << 4;
         v3d->blendCol1 = vOp->col1 << 2;
         v3d->blendAl0 = vOp->al0 << 4;

commit b895908d5bcfc3261bfaa69040df22ad55ca5d86
Author: Oppen <mrugiero@gmail.com>
Date:   Tue Dec 3 00:27:17 2013 -0300

    Fix memory leak.

diff --git a/src/via_dri.c b/src/via_dri.c
index c8d3180..2f21a2b 100644
--- a/src/via_dri.c
+++ b/src/via_dri.c
@@ -478,6 +478,14 @@ VIAInitVisualConfigs(ScreenPtr pScreen)
         if (i != numConfigs) {
             xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "[dri] Incorrect "
                        "initialization of visuals.  Disabling DRI.\n");
+
+            if (pConfigs)
+                free(pConfigs);
+            if (pVIAConfigs)
+                free(pVIAConfigs);
+            if (pVIAConfigPtrs)
+                free(pVIAConfigPtrs);
+
             return FALSE;
         }
     }