1 files changed, 12 insertions, 5 deletions

diff --git a/xorg-server/dbe/dbe.c b/xorg-server/dbe/dbe.c
index 475ba4c18..c19f4a47f 100644
--- a/xorg-server/dbe/dbe.c
+++ b/xorg-server/dbe/dbe.c
@@ -450,18 +450,21 @@ ProcDbeSwapBuffers(ClientPtr client)
     DbeSwapInfoPtr swapInfo;
     xDbeSwapInfo *dbeSwapInfo;
     int error;
-    register int i, j;
-    int nStuff;
+    unsigned int i, j;
+    unsigned int nStuff;
+    int nStuff_i;       /* DDX API requires int for nStuff */
 
     REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq);
     nStuff = stuff->n;          /* use local variable for performance. */
 
     if (nStuff == 0) {
+        REQUEST_SIZE_MATCH(xDbeSwapBuffersReq);
         return Success;
     }
 
     if (nStuff > UINT32_MAX / sizeof(DbeSwapInfoRec))
         return BadAlloc;
+    REQUEST_FIXED_SIZE(xDbeSwapBuffersReq, nStuff * sizeof(xDbeSwapInfo));
 
     /* Get to the swap info appended to the end of the request. */
     dbeSwapInfo = (xDbeSwapInfo *) &stuff[1];
@@ -525,9 +528,10 @@ ProcDbeSwapBuffers(ClientPtr client)
      * could deal with cross-screen synchronization.
      */
 
-    while (nStuff > 0) {
+    nStuff_i = nStuff;
+    while (nStuff_i > 0) {
         pDbeScreenPriv = DBE_SCREEN_PRIV_FROM_WINDOW(swapInfo[0].pWindow);
-        error = (*pDbeScreenPriv->SwapBuffers) (client, &nStuff, swapInfo);
+        error = (*pDbeScreenPriv->SwapBuffers) (client, &nStuff_i, swapInfo);
         if (error != Success) {
             free(swapInfo);
             return error;
@@ -912,13 +916,16 @@ static int
 SProcDbeSwapBuffers(ClientPtr client)
 {
     REQUEST(xDbeSwapBuffersReq);
-    register int i;
+    unsigned int i;
     xDbeSwapInfo *pSwapInfo;
 
     swaps(&stuff->length);
     REQUEST_AT_LEAST_SIZE(xDbeSwapBuffersReq);
 
     swapl(&stuff->n);
+    if (stuff->n > UINT32_MAX / sizeof(DbeSwapInfoRec))
+        return BadAlloc;
+    REQUEST_FIXED_SIZE(xDbeSwapBuffersReq, stuff->n * sizeof(xDbeSwapInfo));
 
     if (stuff->n != 0) {
         pSwapInfo = (xDbeSwapInfo *) stuff + 1;