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internal/poll: deadlock in Read on arm64 when an FD is closed [1.16 backport] #50610

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gopherbot opened this issue Jan 14, 2022 · 4 comments
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internal/poll: deadlock in Read on arm64 when an FD is closed [1.16 backport] #50610

gopherbot opened this issue Jan 14, 2022 · 4 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge
Milestone
Go1.16.16

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@gopherbot
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@bcmills requested issue #45211 to be considered for backport to the next 1.16 minor release.

@gopherbot, please backport to 1.17 and 1.16: this is a race condition that can result in deadlocks on ARM64 in any process that relies on Close unblocking a read. It is tricky to diagnose (and hard to reproduce reliably), and there is no apparent workaround for users on ARM64 machines.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Jan 14, 2022
@gopherbot gopherbot mentioned this issue Jan 14, 2022
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@gopherbot gopherbot added this to the Go1.16.14 milestone Jan 14, 2022
@cherrymui cherrymui modified the milestones: Go1.16.14, Go1.16.15 Feb 9, 2022
@toothrot
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toothrot commented Feb 9, 2022

Approved. This is a serious issue with no workaround.

@toothrot toothrot added CherryPickApproved Used during the release process for point releases and removed CherryPickCandidate Used during the release process for point releases labels Feb 9, 2022
@dmitshur dmitshur mentioned this issue Feb 18, 2022
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@cagedmantis cagedmantis modified the milestones: Go1.16.15, Go1.16.16 Mar 3, 2022
@heschi
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heschi commented Mar 14, 2022

@bcmills @rsc @ianlancetaylor

This backport is at risk of missing the next minor release.

@gopherbot
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Change https://go.dev/cl/392576 mentions this issue: [release-branch.go1.16] runtime: fix net poll races

@heschi
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heschi commented Mar 16, 2022

1.16 is no longer supported; closing this backport request. (Sorry for pinging it Monday.)

@heschi heschi closed this as completed Mar 16, 2022
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Go1.16.16
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@toothrot @cagedmantis @gopherbot @cherrymui @heschi