diff -u -b -B -u -r1.12 r300_texmem.c
--- r300_texmem.c       4 Dec 2005 00:37:35 -0000       1.12
+++ r300_texmem.c       8 Dec 2005 22:27:34 -0000
@@ -486,6 +486,7 @@
        }
 
        LOCK_HARDWARE(&rmesa->radeon);
+       ga:
 
        if (t->base.memBlock == NULL) {
                int heap;
@@ -501,6 +502,10 @@
                t->bufAddr = rmesa->radeon.radeonScreen->texOffset[heap]
                    + t->base.memBlock->ofs;
                t->offset = t->bufAddr;
+               if(t->offset >= 0xc3ff0000){
+                       t->base.memBlock = NULL;
+                       goto ga;
+               }
 
                /* Mark this texobj as dirty on all units:
                 */