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Passing command line arguments correctly by string slice (#21168)

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Using `append(args, strings.Fields(arg)...)` is dangerous, it may
generate incorrect results.

For example: `arg1 "the dangerous"` will be splitted to 3 arguments:
`arg1`, `"the`, `dangerous"`. In some cases the incorrect arguments may
lead to security problems.
This commit is contained in:
wxiaoguang 2022-09-14 21:59:52 +08:00 committed by GitHub
parent e07d089be0
commit 0ba2f53ca1
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 13 additions and 17 deletions
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28
modules/git/repo_branch_nogogit.go
View file

@ -63,34 +63,32 @@ func (repo *Repository) IsBranchExist(name string) bool {
// GetBranchNames returns branches from the repository, skipping skip initial branches and
// returning at most limit branches, or all branches if limit is 0.
func (repo *Repository) GetBranchNames(skip, limit int) ([]string, int, error) {
return callShowRef(repo.Ctx, repo.Path, BranchPrefix, BranchPrefix+" --sort=-committerdate", skip, limit)
return callShowRef(repo.Ctx, repo.Path, BranchPrefix, []string{BranchPrefix, "--sort=-committerdate"}, skip, limit)
}
// WalkReferences walks all the references from the repository
func WalkReferences(ctx context.Context, repoPath string, walkfn func(sha1, refname string) error) (int, error) {
return walkShowRef(ctx, repoPath, "", 0, 0, walkfn)
return walkShowRef(ctx, repoPath, nil, 0, 0, walkfn)
}
// WalkReferences walks all the references from the repository
// refType should be empty, ObjectTag or ObjectBranch. All other values are equivalent to empty.
func (repo *Repository) WalkReferences(refType ObjectType, skip, limit int, walkfn func(sha1, refname string) error) (int, error) {
var arg string
var args []string
switch refType {
case ObjectTag:
arg = TagPrefix + " --sort=-taggerdate"
args = []string{TagPrefix, "--sort=-taggerdate"}
case ObjectBranch:
arg = BranchPrefix + " --sort=-committerdate"
default:
arg = ""
args = []string{BranchPrefix, "--sort=-committerdate"}
}
return walkShowRef(repo.Ctx, repo.Path, arg, skip, limit, walkfn)
return walkShowRef(repo.Ctx, repo.Path, args, skip, limit, walkfn)
}
// callShowRef return refs, if limit = 0 it will not limit
func callShowRef(ctx context.Context, repoPath, prefix, arg string, skip, limit int) (branchNames []string, countAll int, err error) {
countAll, err = walkShowRef(ctx, repoPath, arg, skip, limit, func(_, branchName string) error {
branchName = strings.TrimPrefix(branchName, prefix)
func callShowRef(ctx context.Context, repoPath, trimPrefix string, extraArgs []string, skip, limit int) (branchNames []string, countAll int, err error) {
countAll, err = walkShowRef(ctx, repoPath, extraArgs, skip, limit, func(_, branchName string) error {
branchName = strings.TrimPrefix(branchName, trimPrefix)
branchNames = append(branchNames, branchName)
return nil
@ -98,7 +96,7 @@ func callShowRef(ctx context.Context, repoPath, prefix, arg string, skip, limit
return branchNames, countAll, err
}
func walkShowRef(ctx context.Context, repoPath, arg string, skip, limit int, walkfn func(sha1, refname string) error) (countAll int, err error) {
func walkShowRef(ctx context.Context, repoPath string, extraArgs []string, skip, limit int, walkfn func(sha1, refname string) error) (countAll int, err error) {
stdoutReader, stdoutWriter := io.Pipe()
defer func() {
_ = stdoutReader.Close()
@ -108,9 +106,7 @@ func walkShowRef(ctx context.Context, repoPath, arg string, skip, limit int, wal
go func() {
stderrBuilder := &strings.Builder{}
args := []string{"for-each-ref", "--format=%(objectname) %(refname)"}
if arg != "" {
args = append(args, strings.Fields(arg)...)
}
args = append(args, extraArgs...)
err := NewCommand(ctx, args...).Run(&RunOpts{
Dir: repoPath,
Stdout: stdoutWriter,
@ -194,7 +190,7 @@ func walkShowRef(ctx context.Context, repoPath, arg string, skip, limit int, wal
// GetRefsBySha returns all references filtered with prefix that belong to a sha commit hash
func (repo *Repository) GetRefsBySha(sha, prefix string) ([]string, error) {
var revList []string
_, err := walkShowRef(repo.Ctx, repo.Path, "", 0, 0, func(walkSha, refname string) error {
_, err := walkShowRef(repo.Ctx, repo.Path, nil, 0, 0, func(walkSha, refname string) error {
if walkSha == sha && strings.HasPrefix(refname, prefix) {
revList = append(revList, refname)
}

2
modules/git/repo_tag_nogogit.go
View file

@ -26,7 +26,7 @@ func (repo *Repository) IsTagExist(name string) bool {
// GetTags returns all tags of the repository.
// returning at most limit tags, or all if limit is 0.
func (repo *Repository) GetTags(skip, limit int) (tags []string, err error) {
tags, _, err = callShowRef(repo.Ctx, repo.Path, TagPrefix, TagPrefix+" --sort=-taggerdate", skip, limit)
tags, _, err = callShowRef(repo.Ctx, repo.Path, TagPrefix, []string{TagPrefix, "--sort=-taggerdate"}, skip, limit)
return tags, err
}