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net: infinite loop in LookupAddr() [1.12 backport] #34661

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gopherbot opened this issue Oct 2, 2019 · 2 comments
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net: infinite loop in LookupAddr() [1.12 backport] #34661

gopherbot opened this issue Oct 2, 2019 · 2 comments
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Go1.12.12

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@gopherbot gopherbot commented Oct 2, 2019

@bradfitz requested issue #34660 to be considered for backport to the next 1.12 minor release.

@gopherbot, please backport to Go 1.12 and Go 1.13. This looks like a DoS vector.
@gopherbot gopherbot mentioned this issue Oct 2, 2019
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@gopherbot gopherbot added this to the Go1.12.11 milestone Oct 2, 2019
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@gopherbot gopherbot commented Oct 2, 2019

Change https://golang.org/cl/198497 mentions this issue: [release-branch.go1.12] net: avoid an infinite loop in LookupAddr
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@gopherbot gopherbot commented Oct 3, 2019

Closed by merging 273d946 to release-branch.go1.12.
@gopherbot gopherbot closed this Oct 3, 2019
gopherbot pushed a commit that referenced this issue Oct 3, 2019
@bradfitz
[release-branch.go1.12] net: avoid an infinite loop in LookupAddr
273d946 
If a request for a PTR record returned a response with a non-PTR
answer, goLookupPTR would loop forever.  Skipping non-PTR answers
guarantees progress through the DNS response.

Fixes #34661
Updates #34660

Change-Id: Ib5e5263243bc34b9e2f85aa2b913c9cd50dbcaa5
Reviewed-on: https://go-review.googlesource.com/c/go/+/198497
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
@katiehockman katiehockman modified the milestones: Go1.12.11, Go1.12.12 Oct 17, 2019
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