github.com/cilium/ebpf@v0.10.0/btf/fuzz_test.go (about)

     1  package btf
     2  
     3  import (
     4  	"bytes"
     5  	"encoding/binary"
     6  	"fmt"
     7  	"io"
     8  	"testing"
     9  
    10  	"github.com/cilium/ebpf/internal"
    11  )
    12  
    13  func FuzzSpec(f *testing.F) {
    14  	var buf bytes.Buffer
    15  	err := binary.Write(&buf, internal.NativeEndian, &btfHeader{
    16  		Magic:   btfMagic,
    17  		Version: 1,
    18  		HdrLen:  uint32(binary.Size(btfHeader{})),
    19  	})
    20  	if err != nil {
    21  		f.Fatal(err)
    22  	}
    23  	f.Add(buf.Bytes())
    24  	f.Fuzz(func(t *testing.T, data []byte) {
    25  		if len(data) < binary.Size(btfHeader{}) {
    26  			t.Skip("data is too short")
    27  		}
    28  
    29  		spec, err := loadRawSpec(bytes.NewReader(data), internal.NativeEndian, nil, nil)
    30  		if err != nil {
    31  			if spec != nil {
    32  				t.Fatal("spec is not nil")
    33  			}
    34  			return
    35  		}
    36  
    37  		if spec == nil {
    38  			t.Fatal("spec is nil")
    39  		}
    40  
    41  		for _, typ := range spec.types {
    42  			fmt.Fprintf(io.Discard, "%+10v", typ)
    43  		}
    44  	})
    45  }
    46  
    47  func FuzzExtInfo(f *testing.F) {
    48  	var buf bytes.Buffer
    49  	err := binary.Write(&buf, internal.NativeEndian, &btfExtHeader{
    50  		Magic:   btfMagic,
    51  		Version: 1,
    52  		HdrLen:  uint32(binary.Size(btfExtHeader{})),
    53  	})
    54  	if err != nil {
    55  		f.Fatal(err)
    56  	}
    57  	f.Add(buf.Bytes(), []byte("\x00foo\x00barfoo\x00"))
    58  
    59  	f.Fuzz(func(t *testing.T, data, strings []byte) {
    60  		if len(data) < binary.Size(btfExtHeader{}) {
    61  			t.Skip("data is too short")
    62  		}
    63  
    64  		table, err := readStringTable(bytes.NewReader(strings), nil)
    65  		if err != nil {
    66  			t.Skip("invalid string table")
    67  		}
    68  
    69  		info, err := loadExtInfos(bytes.NewReader(data), internal.NativeEndian, nil, table)
    70  		if err != nil {
    71  			if info != nil {
    72  				t.Fatal("info is not nil")
    73  			}
    74  		} else if info == nil {
    75  			t.Fatal("info is nil")
    76  		}
    77  	})
    78  }