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Keith Randall 1b4cf43e42 runtime: size maps.Clone destination bucket array safely
In rare situations, like during same-sized grows, the source map for
maps.Clone may be overloaded (has more than 6.5 entries per
bucket). This causes the runtime to allocate a larger bucket array for
the destination map than for the source map. The maps.Clone code
walks off the end of the source array if it is smaller than the
destination array.

This is a pretty simple fix, ensuring that the destination bucket
array is never longer than the source bucket array. Maybe a better fix
is to make the Clone code handle shorter source arrays correctly, but
this fix is deliberately simple to reduce the risk of backporting this
fix.

Fixes #69110

Change-Id: I824c93d1db690999f25a3c43b2816fc28ace7509
Reviewed-on: https://go-review.googlesource.com/c/go/+/609757
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2024-09-04 16:06:05 +00:00
.github .github: update language change proposal template 2024-08-08 19:02:29 +00:00
api net/http: add HTTP2Config 2024-08-29 17:38:46 +00:00
doc encoding/json: add embedded structs to the UnmarshalTypeError's Field 2024-09-03 15:49:47 +00:00
lib misc/wasm: move wasm runtime files to lib/wasm 2024-08-30 19:15:21 +00:00
misc misc/wasm: move wasm runtime files to lib/wasm 2024-08-30 19:15:21 +00:00
src runtime: size maps.Clone destination bucket array safely 2024-09-04 16:06:05 +00:00
test runtime: size maps.Clone destination bucket array safely 2024-09-04 16:06:05 +00:00
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.gitignore runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
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CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00
LICENSE LICENSE: update per Google Legal 2024-08-09 14:54:31 +00:00
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