[release-branch.go1.25] all: avoid unsafe StringToUTF16Ptr on Windows

The syscall.UTF16PtrFromString function panics when
provided with an input containing a NUL character.
Replace with syscall.UTF16PtrFromString.

Fixes potential panics in net.Dial, net.LookupPort,
and syscall.Readlink.

Fixes CVE-2026-39836
Updates #79006
Fixes #79028

Change-Id: I2fd7bb750d27474047f199faca4061466a6a6964
Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/4260
Reviewed-by: Nicholas Husin <husin@google.com>
Reviewed-by: Neal Patel <nealpatel@google.com>
Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/4441
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/775160
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
TryBot-Bypass: Gopher Robot <gobot@golang.org>
5 files changed
tree: 09c38c2edbfcc7e22af5ff484bd9ab2cfa6e98a1
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. go.env
  13. LICENSE
  14. PATENTS
  15. README.md
  16. SECURITY.md
  17. VERSION
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