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crypto/tls: DialWithDialer performs racy copy if config.ServerName is not set #16134

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lmb opened this issue Jun 21, 2016 · 1 comment
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crypto/tls: DialWithDialer performs racy copy if config.ServerName is not set #16134

lmb opened this issue Jun 21, 2016 · 1 comment
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lmb commented Jun 21, 2016

tls.DialWithDialer copies the passed in tls.Config if Config.ServerName is not set, but does not exclude copying the unexported sync.Once: tls.go:138.

DialWithDialer should use something like cloneTLSClientConfig from net/http. Related to #15771, which proposes implementing a Clone method on Config, which would help here.

CC @GeoffreyPlouviez who found the bug originally.
@ianlancetaylor ianlancetaylor added this to the Go1.7 milestone Jun 21, 2016
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CL https://golang.org/cl/24287 mentions this issue.

@golang golang locked and limited conversation to collaborators Jun 27, 2017
FiloSottile pushed a commit to FiloSottile/go that referenced this issue Oct 12, 2018
@ianlancetaylor
crypto/tls: don't copy Mutex or Once values
a842784 
This fixes some 40 warnings from go vet.

Fixes golang#16134.

Change-Id: Ib9fcba275fe692f027a2a07b581c8cf503b11087
Reviewed-on: https://go-review.googlesource.com/24287
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
FiloSottile pushed a commit to FiloSottile/go that referenced this issue Oct 12, 2018
@ianlancetaylor
crypto/tls: don't copy Mutex or Once values
4cf6d79 
This fixes some 40 warnings from go vet.

Fixes golang#16134.

Change-Id: Ib9fcba275fe692f027a2a07b581c8cf503b11087
Reviewed-on: https://go-review.googlesource.com/24287
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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