zig

commit 7a59cd286345470412b4880ca576553c7d5827eb (tree)
parent da24ea7f36d056cb49e8e91064f06cb724e46f67
Author: Jacob Young <jacobly0@users.noreply.github.com>
Date:   Fri,  2 Jun 2023 05:07:07 -0400

Sema: hack around UAF

Diffstat:
M
src/Sema.zig
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/Sema.zig b/src/Sema.zig
@@ -26792,11 +26792,12 @@ fn coerceValueInMemory(
                     else => unreachable,
                 };
                 if (src_ty_child != dst_ty_child) break :direct;
+                // TODO: write something like getCoercedInts to avoid needing to dupe
                 return (try mod.intern(.{ .aggregate = .{
                     .ty = dst_ty.toIntern(),
                     .storage = switch (aggregate.storage) {
-                        .bytes => |bytes| .{ .bytes = bytes[0..dest_len] },
-                        .elems => |elems| .{ .elems = elems[0..dest_len] },
+                        .bytes => |bytes| .{ .bytes = try sema.arena.dupe(u8, bytes[0..dest_len]) },
+                        .elems => |elems| .{ .elems = try sema.arena.dupe(InternPool.Index, elems[0..dest_len]) },
                         .repeated_elem => |elem| .{ .repeated_elem = elem },
                     },
                 } })).toValue();