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Russ Cox 12ab0ac184 net: pass C string to res_nsearch, in case it stores the pointer 
The current code passes a Go pointer to a NUL-terminated C string
to the C function res_nsearch (or res_search), but that function may
in turn store the pointer into the res_state, which is a violation of the
cgo pointer rules and is being detected on the linux-amd64-wsl builder.

Allocating the string in C memory is safer and should resolve
the cgo pointer check. When using libc/syscall mode, the memory
is still allocated Go-side, which could potentially be a problem
if we ever add a moving collector. For now it is OK.

Fixes #56658.

Change-Id: Ibd84a9665be16c71994ddb1eedf09d45a6553a3e
Reviewed-on: https://go-review.googlesource.com/c/go/+/448795
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Bypass: Russ Cox <rsc@golang.org>
2022-11-08 20:59:36 +00:00
.github .github: update issue label for pkgsite-removal 2022-09-07 16:00:20 +00:00
api context: add APIs for writing and reading cancelation cause 2022-11-08 13:51:16 +00:00
doc doc: add a release note for fewer pre-compiled GOROOT .a files 2022-11-07 15:51:10 +00:00
lib/time lib/time, time/tzdata: update to 2022b 2022-08-11 20:03:19 +00:00
misc misc/cgo/test: skip Test9400 on Alpine 2022-11-07 21:15:29 +00:00
src net: pass C string to res_nsearch, in case it stores the pointer 2022-11-08 20:59:36 +00:00
test codegen: check for PPC64 ISEL in condmove tests 2022-11-07 15:19:20 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
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CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image Gopher image by Renee French, licensed under Creative Commons 4.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

Download and Install

Binary Distributions

Official binary distributions are available at https://go.dev/dl/.

After downloading a binary release, visit https://go.dev/doc/install for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.