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e9f0381a80
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Cherry Mui e9f0381a80 cmd/link: don't unmap output file at error exit 
When the link exits on error it currently calls Out.Close, which
will munmap the output buffer and close the file. This may be
called in concurrent phase where other goroutines may be writing
to the output buffer. The munmap can race with the write, causing
it to write to unmapped memory and crash. This CL changes it to
just close the file without unmapping. We're exiting on error
anyway so no need to unmap.

Fixes #47816.

Change-Id: I0e89aca991bdada3d017b7d5c8efc29e46308c03
Reviewed-on: https://go-review.googlesource.com/c/go/+/363357
Trust: Cherry Mui <cherryyz@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-11-12 14:55:44 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api syscall: migrate new UDP send/recv API to internal/syscall/unix 2021-11-03 21:45:33 +00:00
doc spec: fix a broken link 2021-11-11 19:44:13 +00:00
lib/time lib/time, time/tzdata: update to 2021e 2021-11-11 05:16:39 +00:00
misc misc/cgo/testshared: correct test of gccgo version number 2021-11-11 04:54:05 +00:00
src cmd/link: don't unmap output file at error exit 2021-11-12 14:55:44 +00:00
test cmd/compile: ensure stenciled function bodies are nonempty 2021-11-11 20:34:56 +00:00
.gitattributes
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: add Leonard Wang (individual CLA) 2021-11-02 06:25:39 +00:00
codereview.cfg
CONTRIBUTING.md
CONTRIBUTORS A+C: add Leonard Wang (individual CLA) 2021-11-02 06:25:39 +00:00
LICENSE
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README.md README.md: update contribute URL 2021-09-30 13:33:21 +00:00
SECURITY.md

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 3.0 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.

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

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Contributing

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

To contribute, please read the contribution guidelines at https://golang.org/doc/contribute.

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