diff options
Diffstat (limited to 'vendor/gopkg.in/yaml.v2/decode.go')
| -rw-r--r-- | vendor/gopkg.in/yaml.v2/decode.go | 13 |
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 } |