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Check pos bounds for table.insert.

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Enyby
2019-11-03 15:55:32 +02:00
parent 99f21b6277
commit 9a20aa8077
1 changed files with 9 additions and 5 deletions
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14
src/core/org/luaj/vm2/lib/TableLib.java
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@@ -94,18 +94,22 @@ public class TableLib extends TwoArgFunction {
static class insert extends VarArgFunction { static class insert extends VarArgFunction {
public Varargs invoke(Varargs args) { public Varargs invoke(Varargs args) {
switch (args.narg()) { switch (args.narg()) {
case 0: case 1: {
return argerror(2, "value expected");
}
case 2: { case 2: {
LuaTable table = args.checktable(1); LuaTable table = args.checktable(1);
table.insert(table.length()+1,args.arg(2)); table.insert(table.length()+1,args.arg(2));
return NONE; return NONE;
} }
default: { case 3: {
args.checktable(1).insert(args.checkint(2),args.arg(3)); LuaTable table = args.checktable(1);
int pos = args.checkint(2);
int max = table.length() + 1;
if (pos < 1 || pos > max) argerror(2, "position out of bounds: " + pos + " not between 1 and " + max);
table.insert(pos, args.arg(3));
return NONE; return NONE;
} }
default: {
return error("wrong number of arguments to 'table.insert': " + args.narg() + " (must be 2 or 3)");
}
} }
} }
} }