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net: LookupMX behaviour broken [1.16 backport] #46999

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gopherbot opened this issue Jun 30, 2021 · 5 comments
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net: LookupMX behaviour broken [1.16 backport] #46999

gopherbot opened this issue Jun 30, 2021 · 5 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge release-blocker
Milestone
Go1.16.6

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@gopherbot
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gopherbot commented Jun 30, 2021 •
edited by FiloSottile

@FiloSottile requested issue #46979 to be considered for backport to the next 1.16 minor release.

@gopherbot please open a backport issue for Go 1.16, this is a regression in the last minor release.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Jun 30, 2021
@gopherbot gopherbot mentioned this issue Jun 30, 2021
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@FiloSottile FiloSottile changed the title net: LookupMX behaviour broken [1.17 backport] net: LookupMX behaviour broken [1.16 backport] Jun 30, 2021
@gopherbot gopherbot added this to the Go1.16.6 milestone Jun 30, 2021
@FiloSottile
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I meant Go 1.16, not Go 1.17, clearly 🤦 nice that gopherbot still milestoned it correctly once I fixed the title.

@dmitshur dmitshur mentioned this issue Jul 1, 2021
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@gopherbot
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Change https://golang.org/cl/332371 mentions this issue: [release-branch.go1.16] net: don't reject null mx records

@dmitshur
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dmitshur commented Jul 1, 2021

We've considered this in a release meeting. Approving as it is a serious issue without a workaround. This backport applies to both 1.16 (this issue) and 1.15 (#47012).

@dmitshur dmitshur added CherryPickApproved Used during the release process for point releases and removed CherryPickCandidate Used during the release process for point releases labels Jul 1, 2021
@gopherbot
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Closed by merging a91ed83 to release-branch.go1.16.

gopherbot pushed a commit that referenced this issue Jul 8, 2021
@rolandshoemaker
[release-branch.go1.16] net: don't reject null mx records
a91ed83 
Bypass hostname validity checking when a null mx record is returned as,
defined in RFC 7505.

Updates #46979
Updates #46999

Change-Id: Ibe683bd6b47333a8ff30909fb2680ec8e10696ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/332094
Trust: Roland Shoemaker <roland@golang.org>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
(cherry picked from commit 03761ed)
Reviewed-on: https://go-review.googlesource.com/c/go/+/332371
Run-TryBot: Katie Hockman <katie@golang.org>
@gopherbot
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Change https://golang.org/cl/333330 mentions this issue: [release-branch.go1.16] net: filter bad names from Lookup functions instead of hard failing

gopherbot pushed a commit that referenced this issue Jul 8, 2021
@rolandshoemaker
[release-branch.go1.16] net: filter bad names from Lookup functions i…
fb052db 
…nstead of hard failing

Instead of hard failing on a single bad record, filter the bad records
and return anything valid. This only applies to the methods which can
return multiple records, LookupMX, LookupNS, LookupSRV, and LookupAddr.

When bad results are filtered out, also return an error, indicating
that this filtering has happened.

Updates #46241
Updates #46979
Fixes #46999

Change-Id: I6493e0002beaf89f5a9795333a93605abd30d171
Reviewed-on: https://go-review.googlesource.com/c/go/+/332549
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
(cherry picked from commit 296ddf2)
Reviewed-on: https://go-review.googlesource.com/c/go/+/333330
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
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