Passing a dereferenced value from Hashmap::Find() directly into Hashmap::Add() is a potential cause of UAF, as the insertion may reallocate the map, invalidating the input reference.
I'll try to think of ways to make this foot-gun harder to do, but this CL fixes the immediate bug found by fuzzers.
Bug: chromium:1383755
Change-Id: I4f8b2fcb0745b008a47ef9947c330afb9ac4e78f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110020
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Ben Clayton