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Diffstat (limited to 'vendor/gopkg.in/yaml.v2/decode.go')
-rw-r--r--vendor/gopkg.in/yaml.v2/decode.go13
1 files changed, 13 insertions, 0 deletions
diff --git a/vendor/gopkg.in/yaml.v2/decode.go b/vendor/gopkg.in/yaml.v2/decode.go
index e4e56e28e..91679b5b4 100644
--- a/vendor/gopkg.in/yaml.v2/decode.go
+++ b/vendor/gopkg.in/yaml.v2/decode.go
@@ -229,6 +229,10 @@ type decoder struct {
mapType reflect.Type
terrors []string
strict bool
+
+ decodeCount int
+ aliasCount int
+ aliasDepth int
}
var (
@@ -315,6 +319,13 @@ func (d *decoder) prepare(n *node, out reflect.Value) (newout reflect.Value, unm
}
func (d *decoder) unmarshal(n *node, out reflect.Value) (good bool) {
+ d.decodeCount++
+ if d.aliasDepth > 0 {
+ d.aliasCount++
+ }
+ if d.aliasCount > 100 && d.decodeCount > 1000 && float64(d.aliasCount)/float64(d.decodeCount) > 0.99 {
+ failf("document contains excessive aliasing")
+ }
switch n.kind {
case documentNode:
return d.document(n, out)
@@ -353,7 +364,9 @@ func (d *decoder) alias(n *node, out reflect.Value) (good bool) {
failf("anchor '%s' value contains itself", n.value)
}
d.aliases[n] = true
+ d.aliasDepth++
good = d.unmarshal(n.alias, out)
+ d.aliasDepth--
delete(d.aliases, n)
return good
}