Infer the package type from ELF package notes

cmd/syft/internal/test/integration/mariner_distroless_test.go

@@ -10,7 +10,8 @@ import (
 func TestMarinerDistroless(t *testing.T) {
 	sbom, _ := catalogFixtureImage(t, "image-mariner-distroless", source.SquashedScope)
 
-	expectedPkgs := 12
+	// 12 RPMs + 2 binaries with ELF package notes claiming to be RPMs
+	expectedPkgs := 14
 	actualPkgs := 0
 	for range sbom.Artifacts.Packages.Enumerate(pkg.RpmPkg) {
 		actualPkgs += 1

internal/relationship/exclude_binaries_by_file_ownership_overlap.go

@@ -1,6 +1,7 @@
 package relationship
 
 import (
+	"reflect"
 	"slices"
 
 	"github.com/anchore/syft/internal/sbomsync"
@@ -21,6 +22,10 @@ var (
 	binaryCatalogerTypes = []pkg.Type{
 		pkg.BinaryPkg,
 	}
+	binaryMetadataTypes = []string{
+		reflect.TypeOf(pkg.ELFBinaryPackageNoteJSONPayload{}).Name(),
+		reflect.TypeOf(pkg.BinarySignature{}).Name(),
+	}
 )
 
 func ExcludeBinariesByFileOwnershipOverlap(accessor sbomsync.Accessor) {
@@ -60,5 +65,15 @@ func excludeBinaryByFileOwnershipOverlap(r artifact.Relationship, c *pkg.Collect
 		return false
 	}
 
-	return slices.Contains(binaryCatalogerTypes, child.Type)
+	if slices.Contains(binaryCatalogerTypes, child.Type) {
+		return true
+	}
+
+	if child.Metadata == nil {
+		return false
+	}
+
+	childMetadataType := reflect.TypeOf(child.Metadata)
+
+	return slices.Contains(binaryMetadataTypes, childMetadataType.Name())
 }

internal/relationship/exclude_binaries_by_file_ownership_overlap_test.go

@@ -12,7 +12,9 @@ func TestExclude(t *testing.T) {
 	packageB := pkg.Package{Name: "package-a", Type: pkg.PythonPkg}
 	packageC := pkg.Package{Name: "package-a", Type: pkg.BinaryPkg}
 	packageD := pkg.Package{Name: "package-d", Type: pkg.BinaryPkg}
-	for _, p := range []*pkg.Package{&packageA, &packageB, &packageC, &packageD} {
+	packageE := pkg.Package{Name: "package-e", Type: pkg.RpmPkg, Metadata: pkg.ELFBinaryPackageNoteJSONPayload{Type: "rpm"}}
+	packageF := pkg.Package{Name: "package-f", Type: pkg.RpmPkg, Metadata: pkg.BinarySignature{}}
+	for _, p := range []*pkg.Package{&packageA, &packageB, &packageC, &packageD, &packageE, &packageF} {
 		p := p
 		p.SetID()
 	}
@@ -43,6 +45,26 @@ func TestExclude(t *testing.T) {
 			packages:      pkg.NewCollection(packageA, packageC),
 			shouldExclude: true,
 		},
+		{
+			name: "exclusions from os -> elf binary (as RPM)",
+			relationship: artifact.Relationship{
+				Type: artifact.OwnershipByFileOverlapRelationship,
+				From: packageA,
+				To:   packageE,
+			},
+			packages:      pkg.NewCollection(packageA, packageE),
+			shouldExclude: true,
+		},
+		{
+			name: "exclusions from os -> binary (masquerading as RPM)",
+			relationship: artifact.Relationship{
+				Type: artifact.OwnershipByFileOverlapRelationship,
+				From: packageA,
+				To:   packageF,
+			},
+			packages:      pkg.NewCollection(packageA, packageF),
+			shouldExclude: true,
+		},
 		{
 			name: "no exclusions from python -> binary",
 			relationship: artifact.Relationship{

syft/pkg/cataloger/binary/elf_package.go

@@ -13,7 +13,7 @@ func newELFPackage(metadata elfBinaryPackageNotes, locations file.LocationSet) p
 		Version:   metadata.Version,
 		Licenses:  pkg.NewLicenseSet(pkg.NewLicense(metadata.License)),
 		PURL:      packageURL(metadata),
-		Type:      pkg.BinaryPkg,
+		Type:      pkgType(metadata.Type),
 		Locations: locations,
 		Metadata:  metadata.ELFBinaryPackageNoteJSONPayload,
 	}
@@ -67,6 +67,8 @@ func packageURL(metadata elfBinaryPackageNotes) string {
 	).ToString()
 }
 
+const alpmType = "alpm"
+
 func purlDistroType(ty string) string {
 	switch ty {
 	case "rpm":
@@ -75,8 +77,22 @@ func purlDistroType(ty string) string {
 		return packageurl.TypeDebian
 	case "apk":
 		return packageurl.TypeAlpine
-	case "alpm":
-		return "alpm"
+	case alpmType:
+		return alpmType
 	}
 	return packageurl.TypeGeneric
 }
+
+func pkgType(ty string) pkg.Type {
+	switch ty {
+	case "rpm":
+		return pkg.RpmPkg
+	case "deb":
+		return pkg.DebPkg
+	case "apk":
+		return pkg.ApkPkg
+	case alpmType:
+		return pkg.AlpmPkg
+	}
+	return pkg.BinaryPkg
+}

syft/pkg/cataloger/binary/elf_package_cataloger_test.go

@@ -77,7 +77,7 @@ func Test_ELF_Package_Cataloger(t *testing.T) {
 						file.NewLocation("/sha1sum").WithAnnotation(pkg.EvidenceAnnotationKey, pkg.PrimaryEvidenceAnnotation),
 					),
 					Licenses: pkg.NewLicenseSet(),
-					Type:     pkg.BinaryPkg,
+					Type:     pkg.RpmPkg,
 					Metadata: pkg.ELFBinaryPackageNoteJSONPayload{
 						Type:         "rpm",
 						Architecture: "x86_64",
@@ -99,7 +99,7 @@ func Test_ELF_Package_Cataloger(t *testing.T) {
 						file.NewLocation("/sha1sum").WithAnnotation(pkg.EvidenceAnnotationKey, pkg.PrimaryEvidenceAnnotation),
 					),
 					Licenses: pkg.NewLicenseSet(),
-					Type:     pkg.BinaryPkg,
+					Type:     pkg.RpmPkg,
 					Metadata: pkg.ELFBinaryPackageNoteJSONPayload{
 						Type:         "rpm",
 						Architecture: "arm",