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8edcdddb23
Casting to a *uintptr is not ok if there isn't at least 8 bytes of data backing that pointer (on 64-bit archs). So although we end up making a slice of 0 length with that pointer, the cast itself doesn't know that. Instead, bail early if the result is going to be 0 length. Fixes #59334 Change-Id: Id3c0e09d341d838835c0382cccfb0f71dc3dc7e6 Reviewed-on: https://go-review.googlesource.com/c/go/+/480575 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com>
19 lines
448 B
Go
19 lines
448 B
Go
// run -tags=purego -gcflags=all=-d=checkptr
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// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "crypto/subtle"
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func main() {
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dst := make([]byte, 5)
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src := make([]byte, 5)
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for _, n := range []int{1024, 2048} { // just to make the size non-constant
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b := make([]byte, n)
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subtle.XORBytes(dst, src, b[n-5:])
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}
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}
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