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Protect access to the Expr.y union using nearby assert()s and branches.

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FossilOrigin-Name: 87e2f5eb436fc448427b0e24fb70f29688796b513b8c7b12f1a21540dae1e56d
This commit is contained in:
drh
2021-10-07 20:46:29 +00:00
parent 867bc4de2e
commit 477572b9f1
13 changed files with 131 additions and 78 deletions
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src/vtab.c
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@@ -1137,6 +1137,7 @@ FuncDef *sqlite3VtabOverloadFunction(
/* Check to see the left operand is a column in a virtual table */
if( NEVER(pExpr==0) ) return pDef;
if( pExpr->op!=TK_COLUMN ) return pDef;
assert( ExprUseYTab(pExpr) );
pTab = pExpr->y.pTab;
if( pTab==0 ) return pDef;
if( !IsVirtual(pTab) ) return pDef;