exporter: fix supplement sboms on empty scratch layer

Signed-off-by: Justin Chadwell <me@jedevc.com> (cherry picked from commit f3db114)
moby · Feb 13, 2023 · 0ddf801 · 0ddf801
1 parent 2120078
commit 0ddf801
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/exporter/containerimage/attestations.go b/exporter/containerimage/attestations.go
@@ -31,6 +31,9 @@ var intotoPlatform ocispecs.Platform = ocispecs.Platform{
 
 // supplementSBOM modifies SPDX attestations to include the file layers
 func supplementSBOM(ctx context.Context, s session.Group, target cache.ImmutableRef, targetRemote *solver.Remote, att exporter.Attestation) (exporter.Attestation, error) {
+	if target == nil {
+		return att, nil
+	}
 	if att.Kind != gatewaypb.AttestationKindInToto {
 		return att, nil
 	}