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os/exec: modifications to Path ignored when *Cmd is created using Command with an absolute path on Windows [1.22 backport] #68331

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gopherbot opened this issue Jul 7, 2024 · 3 comments
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os/exec: modifications to Path ignored when *Cmd is created using Command with an absolute path on Windows [1.22 backport] #68331

gopherbot opened this issue Jul 7, 2024 · 3 comments
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CherryPickApproved Used during the release process for point releases OS-Windows
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Go1.22.6

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@gopherbot
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@dmitshur requested issue #68314 to be considered for backport to the next 1.22 minor release.

@gopherbot Please backport to Go 1.22. Only Go 1.22 needs the fix, as this isn't an issue in Go 1.2​1.

This is a regression that can cause wrong binaries to be executed on Windows, with no workaround other than changing user code.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Jul 7, 2024
@gopherbot gopherbot mentioned this issue Jul 7, 2024
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@gopherbot gopherbot added this to the Go1.22.6 milestone Jul 7, 2024
@gopherbot
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Change https://go.dev/cl/596976 mentions this issue: [release-branch.go1.22] os/exec: only use cachedLookExtensions if Cmd.Path is unmodified

@cagedmantis
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Approved. This is a regression that can cause wrong binaries to be executed on Windows, with no workaround other than changing user code.

@cagedmantis cagedmantis added the CherryPickApproved Used during the release process for point releases label Jul 10, 2024
@gopherbot gopherbot removed the CherryPickCandidate Used during the release process for point releases label Jul 10, 2024
gopherbot pushed a commit that referenced this issue Jul 10, 2024
@dmitshur @cagedmantis
[release-branch.go1.22] os/exec: only use cachedLookExtensions if Cmd…
ea96074 
….Path is unmodified

Caching the invocation of lookExtensions on an absolute path in Command
and reusing the cached result in Start is only viable if Cmd.Path isn't
set to a different value after Command returns.

For #66586.
For #68314.
Fixes #68331.

Change-Id: I57007850aca2011b11344180c00faded737617b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/596875
Reviewed-by: qiu laidongfeng2 <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
(cherry picked from commit d0146bd)
Reviewed-on: https://go-review.googlesource.com/c/go/+/596976
@gopherbot
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Closed by merging ea96074 to release-branch.go1.22.

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