Ensure that sqlite3AuthRead() is only call for TK_COLUMN and TK_TRIGGER

expression nodes.  This fixes a harmless assert() identified by OSSFuzz.
Move the assert() into a position where it is tested even if the authorizer
is disabled.

FossilOrigin-Name: d0c3beef7cdc680c0768ddd18f766a4ca7be822c1eb1776b2f73b7433d9962dc

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sbug\sin\sthe\sSQLITE_ENABLE_SORTER_REFERENCES\scode\scausing\san\sout-of-bounds\narray\sreference.
-D 2018-06-01T13:30:45.839
+C Ensure\sthat\ssqlite3AuthRead()\sis\sonly\scall\sfor\sTK_COLUMN\sand\sTK_TRIGGER\nexpression\snodes.\s\sThis\sfixes\sa\sharmless\sassert()\sidentified\sby\sOSSFuzz.\nMove\sthe\sassert()\sinto\sa\sposition\swhere\sit\sis\stested\seven\sif\sthe\sauthorizer\nis\sdisabled.
+D 2018-06-02T11:31:15.578
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in bfc40f350586923e0419d2ea4b559c37ec10ee4b6e210e08c14401f8e340f0da
@@ -432,7 +432,7 @@ F sqlite3.pc.in 48fed132e7cb71ab676105d2a4dc77127d8c1f3a
 F src/alter.c cf7a8af45cb0ace672f47a1b29ab24092a9e8cd8d945a9974e3b5d925f548594
 F src/analyze.c 71fbbeb7b25417592f54d869fe90c28b48e4cecb9926ef9b06d90fb0aec48941
 F src/attach.c 4a3138bd771d5426ae4344d8d5e900440af29fabc5ec2f39f69a45010dfbccd7
-F src/auth.c 6277d63837357549fe14e723490d6dc1a38768d71c795c5eb5c0f8a99f918f73
+F src/auth.c a38f3c63c974787ecf75e3213f8cac6568b9a7af7591fb0372ec0517dd16dca8
 F src/backup.c faf17e60b43233c214aae6a8179d24503a61e83b
 F src/bitvec.c 17ea48eff8ba979f1f5b04cc484c7bb2be632f33
 F src/btmutex.c 8acc2f464ee76324bf13310df5692a262b801808984c1b79defb2503bbafadb6
@@ -493,7 +493,7 @@ F src/pragma.h bb83728944b42f6d409c77f5838a8edbdb0fe83046c5496ffc9602b40340a324
 F src/prepare.c 95a9dba7a5d032039a77775188cb3b6fb17f2fa1a0b7cd915b30b4b823383ffa
 F src/printf.c 7f6f3cba8e0c49c19e30a1ff4e9aeda6e06814dcbad4b664a69e1b6cb6e7e365
 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
-F src/resolve.c 6415381a0e9d22c0e7cba33ca4a53f81474190862f5d4838190f5eb5b0b47bc9
+F src/resolve.c 14602f46800ba182ea6a490e0f304127d29ac1f724bdadcc639e25d3223fcf6e
 F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
 F src/select.c 3291892add3a8f01dc3754e40ef9e30ad22c78e3404a388ae58f0390a1fb29eb
 F src/shell.c.in c29cb307d6275131e6f9874e0fa73f87acf40a22c4a82faba2059a93b4d294d1
@@ -1730,7 +1730,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 66c24513c2f6de98bd888c3e4c07bbb39fabf30ea9dd01eb255460054055347d
-R de534748a7bde116d78575c0d00249be
-U dan
-Z 98720dc1e5a3205614c222172ada64da
+P 8cadaf587dc96370f9c8a1dccc366b93021e8cfe4526da9368a088828fd14faf
+R 7d592e3f2af596781ca513b1afb89a05
+U drh
+Z c3e8bdeb9ee894ba331668f0f76af04a

manifest.uuid

@@ -1 +1 @@
-8cadaf587dc96370f9c8a1dccc366b93021e8cfe4526da9368a088828fd14faf
+d0c3beef7cdc680c0768ddd18f766a4ca7be822c1eb1776b2f73b7433d9962dc

src/auth.c

@@ -150,6 +150,7 @@ void sqlite3AuthRead(
   int iDb;              /* The index of the database the expression refers to */
   int iCol;             /* Index of column in table */
 
+  assert( pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER );
   if( db->xAuth==0 ) return;
   iDb = sqlite3SchemaToIndex(pParse->db, pSchema);
   if( iDb<0 ){
@@ -158,7 +159,6 @@ void sqlite3AuthRead(
     return;
   }
 
-  assert( pExpr->op==TK_COLUMN || pExpr->op==TK_TRIGGER );
   if( pExpr->op==TK_TRIGGER ){
     pTab = pParse->pTriggerTab;
   }else{

src/resolve.c

@@ -75,29 +75,31 @@ static void resolveAlias(
   assert( pOrig!=0 );
   db = pParse->db;
   pDup = sqlite3ExprDup(db, pOrig, 0);
-  if( pDup==0 ) return;
-  if( zType[0]!='G' ) incrAggFunctionDepth(pDup, nSubquery);
-  if( pExpr->op==TK_COLLATE ){
-    pDup = sqlite3ExprAddCollateString(pParse, pDup, pExpr->u.zToken);
-  }
-  ExprSetProperty(pDup, EP_Alias);
+  if( pDup!=0 ){
+    if( zType[0]!='G' ) incrAggFunctionDepth(pDup, nSubquery);
+    if( pExpr->op==TK_COLLATE ){
+      pDup = sqlite3ExprAddCollateString(pParse, pDup, pExpr->u.zToken);
+    }
+    ExprSetProperty(pDup, EP_Alias);
 
-  /* Before calling sqlite3ExprDelete(), set the EP_Static flag. This 
-  ** prevents ExprDelete() from deleting the Expr structure itself,
-  ** allowing it to be repopulated by the memcpy() on the following line.
-  ** The pExpr->u.zToken might point into memory that will be freed by the
-  ** sqlite3DbFree(db, pDup) on the last line of this block, so be sure to
-  ** make a copy of the token before doing the sqlite3DbFree().
-  */
-  ExprSetProperty(pExpr, EP_Static);
-  sqlite3ExprDelete(db, pExpr);
-  memcpy(pExpr, pDup, sizeof(*pExpr));
-  if( !ExprHasProperty(pExpr, EP_IntValue) && pExpr->u.zToken!=0 ){
-    assert( (pExpr->flags & (EP_Reduced|EP_TokenOnly))==0 );
-    pExpr->u.zToken = sqlite3DbStrDup(db, pExpr->u.zToken);
-    pExpr->flags |= EP_MemToken;
+    /* Before calling sqlite3ExprDelete(), set the EP_Static flag. This 
+    ** prevents ExprDelete() from deleting the Expr structure itself,
+    ** allowing it to be repopulated by the memcpy() on the following line.
+    ** The pExpr->u.zToken might point into memory that will be freed by the
+    ** sqlite3DbFree(db, pDup) on the last line of this block, so be sure to
+    ** make a copy of the token before doing the sqlite3DbFree().
+    */
+    ExprSetProperty(pExpr, EP_Static);
+    sqlite3ExprDelete(db, pExpr);
+    memcpy(pExpr, pDup, sizeof(*pExpr));
+    if( !ExprHasProperty(pExpr, EP_IntValue) && pExpr->u.zToken!=0 ){
+      assert( (pExpr->flags & (EP_Reduced|EP_TokenOnly))==0 );
+      pExpr->u.zToken = sqlite3DbStrDup(db, pExpr->u.zToken);
+      pExpr->flags |= EP_MemToken;
+    }
+    sqlite3DbFree(db, pDup);
   }
-  sqlite3DbFree(db, pDup);
+  ExprSetProperty(pExpr, EP_Alias);
 }
 
 
@@ -349,6 +351,7 @@ static int lookupName(
             testcase( iCol==(-1) );
             pExpr->iTable = pNC->uNC.pUpsert->regData + iCol;
             eNewExprOp = TK_REGISTER;
+            ExprSetProperty(pExpr, EP_Alias);
           }else
 #endif /* SQLITE_OMIT_UPSERT */
           {