Add advisory for double-free in stack_dst

crates/stack_dst/RUSTSEC-0000-0000.md

@@ -0,0 +1,26 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "stack_dst"
+date = "2021-02-22"
+url = "https://github.com/thepowersgang/stack_dst-rs/issues/5"
+categories = ["memory-corruption"]
+keywords = ["memory-safety", "double-free"]
+
+[versions]
+patched = [">= 0.6.1"]
+
+[affected]
+functions = { "stack_dst::StackA::push_cloned" = ["< 0.6.1"] }
+```
+
+# push_cloned can drop uninitialized memory or double free on panic
+
+Affected versions of `stack_dst` used a `push_inner` function that increased
+the internal length of the array and then called `val.clone()`.
+
+If the `val.clone()` call panics, the stack could drop an already dropped
+element or drop uninitialized memory.
+
+This issue was fixed in `2a4d538` by increasing the length of the array after
+elements are cloned.