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cmd/go: prevent infinite loop in QueryPackage()

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p = path.Dir(p) converges to either "." or "/". The current
implementation of modload.QueryPackage() has a loop that
terminates only on ".", not "/". This leads to the go command
hanging in an infinite loop if the user manages to supply
a file path starting with "/" as package path.

An example of the issue is if the user (incorrectly) attempts
to use an absolute directory path in an import statement within
a module (import "/home/bob/myproj") and then runs go list.

Fixes #27558
This commit is contained in:
Anton Gyllenberg 2018-10-03 01:02:06 +03:00
parent 3aa3c052e3
commit 3a70d3a427
1 changed files with 1 additions and 1 deletions
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2
src/cmd/go/internal/modload/query.go
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@ -221,7 +221,7 @@ func QueryPackage(path, query string, allowed func(module.Version) bool) (module
} }
finalErr := errMissing finalErr := errMissing
for p := path; p != "."; p = pathpkg.Dir(p) { for p := path; p != "." && p != "/"; p = pathpkg.Dir(p) {
info, err := Query(p, query, allowed) info, err := Query(p, query, allowed)
if err != nil { if err != nil {
if _, ok := err.(*codehost.VCSError); ok { if _, ok := err.(*codehost.VCSError); ok {