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config: check max config size 

limit config size to 1MiB.
This commit is contained in:
Simone Gotti 2020-03-17 11:13:44 +01:00
parent 23dfbb82e1
commit 8a156b936e
1 changed files with 10 additions and 1 deletions
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11
internal/config/config.go
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@ -30,6 +30,7 @@ import (
)
const (
maxConfigSize = 1024 * 1024 // 1MiB
maxRunNameLength = 100
maxTaskNameLength = 100
maxStepNameLength = 100
@ -659,15 +660,19 @@ type ConfigContext struct {
}
func ParseConfig(configData []byte, format ConfigFormat, configContext *ConfigContext) (*Config, error) {
// Generate json from jsonnet
// TODO(sgotti) execute jsonnet and starlark executor in a
// separate process to avoid issues with malformat config that
// could lead to infinite executions and memory exhaustion
switch format {
case ConfigFormatJsonnet:
// Generate json from jsonnet
var err error
configData, err = execJsonnet(configData, configContext)
if err != nil {
return nil, errors.Errorf("failed to execute jsonnet: %w", err)
}
case ConfigFormatStarlark:
// Generate json from starlark
var err error
configData, err = execStarlark(configData, configContext)
if err != nil {
@ -675,6 +680,10 @@ func ParseConfig(configData []byte, format ConfigFormat, configContext *ConfigCo
}
}
if len(configData) > maxConfigSize {
return nil, errors.Errorf("config size is greater than allowed max config size: %d > %d", len(configData), maxConfigSize)
}
config := DefaultConfig
if err := yaml.Unmarshal(configData, &config); err != nil {
return nil, errors.Errorf("failed to unmarshal config: %w", err)