diff options
Diffstat (limited to 'vendor/github.com/klauspost/compress/zstd/decoder.go')
| -rw-r--r-- | vendor/github.com/klauspost/compress/zstd/decoder.go | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/vendor/github.com/klauspost/compress/zstd/decoder.go b/vendor/github.com/klauspost/compress/zstd/decoder.go index d212f4737..6104eb793 100644 --- a/vendor/github.com/klauspost/compress/zstd/decoder.go +++ b/vendor/github.com/klauspost/compress/zstd/decoder.go @@ -312,6 +312,7 @@ func (d *Decoder) DecodeAll(input, dst []byte) ([]byte, error) { // Grab a block decoder and frame decoder. block := <-d.decoders frame := block.localFrame + initialSize := len(dst) defer func() { if debugDecoder { printf("re-adding decoder: %p", block) @@ -354,7 +355,16 @@ func (d *Decoder) DecodeAll(input, dst []byte) ([]byte, error) { return dst, ErrWindowSizeExceeded } if frame.FrameContentSize != fcsUnknown { - if frame.FrameContentSize > d.o.maxDecodedSize-uint64(len(dst)) { + if frame.FrameContentSize > d.o.maxDecodedSize-uint64(len(dst)-initialSize) { + if debugDecoder { + println("decoder size exceeded; fcs:", frame.FrameContentSize, "> mcs:", d.o.maxDecodedSize-uint64(len(dst)-initialSize), "len:", len(dst)) + } + return dst, ErrDecoderSizeExceeded + } + if d.o.limitToCap && frame.FrameContentSize > uint64(cap(dst)-len(dst)) { + if debugDecoder { + println("decoder size exceeded; fcs:", frame.FrameContentSize, "> (cap-len)", cap(dst)-len(dst)) + } return dst, ErrDecoderSizeExceeded } if cap(dst)-len(dst) < int(frame.FrameContentSize) { @@ -364,7 +374,7 @@ func (d *Decoder) DecodeAll(input, dst []byte) ([]byte, error) { } } - if cap(dst) == 0 { + if cap(dst) == 0 && !d.o.limitToCap { // Allocate len(input) * 2 by default if nothing is provided // and we didn't get frame content size. size := len(input) * 2 @@ -382,6 +392,9 @@ func (d *Decoder) DecodeAll(input, dst []byte) ([]byte, error) { if err != nil { return dst, err } + if uint64(len(dst)-initialSize) > d.o.maxDecodedSize { + return dst, ErrDecoderSizeExceeded + } if len(frame.bBuf) == 0 { if debugDecoder { println("frame dbuf empty") @@ -852,6 +865,10 @@ decodeStream: } } if err == nil && d.frame.WindowSize > d.o.maxWindowSize { + if debugDecoder { + println("decoder size exceeded, fws:", d.frame.WindowSize, "> mws:", d.o.maxWindowSize) + } + err = ErrDecoderSizeExceeded } if err != nil { |