syz-cluster: enable KMSAN for net patch series

Set up a KMSAN fuzzing campaign in parallel to KASAN for the net
patches.

Author: a-nogikh

syz-cluster/pkg/api/api.go

@@ -59,6 +59,7 @@ type KernelFuzzConfig struct {
 	CorpusURL      string   `json:"corpus_url"`
 	SkipCoverCheck bool     `json:"skip_cover_check"`
 	BugTitleRe     string   `json:"bug_title_re"`
+	KMSAN          bool     `json:"kmsan"` // Trigger the config changes necessary for KMSAN.
 }
 
 // FuzzTriageTarget is a single record in the list of supported fuzz configs.
@@ -252,7 +253,10 @@ const (
 	allCorpusURL = `https://storage.googleapis.com/syzkaller/corpus/ci-upstream-kasan-gce-root-corpus.db`
 )
 
-const kasanTrack = "KASAN"
+const (
+	kasanTrack = "KASAN"
+	kmsanTrack = "KMSAN"
+)
 
 // The list is ordered by decreasing importance.
 var FuzzTargets = []*FuzzTriageTarget{
@@ -302,6 +306,13 @@ var FuzzTargets = []*FuzzTriageTarget{
 				Focus:        FocusNet,
 				CorpusURL:    netCorpusURL,
 			},
+			{
+				Track:        kmsanTrack,
+				KernelConfig: `upstream-kmsan.config`,
+				Focus:        FocusNet,
+				CorpusURL:    netCorpusURL,
+				KMSAN:        true,
+			},
 		},
 	},
 	{

syz-cluster/pkg/triage/fuzz_target.go

@@ -80,6 +80,7 @@ func mergeFuzzConfigs(configs []*api.KernelFuzzConfig) *api.FuzzConfig {
 		// Must be the same.
 		ret.BugTitleRe = config.BugTitleRe
 		ret.Track = config.Track
+		ret.KMSAN = config.KMSAN
 	}
 	ret.Focus = unique(ret.Focus)
 	ret.CorpusURLs = unique(ret.CorpusURLs)

syz-cluster/pkg/triage/fuzz_target_test.go

@@ -74,6 +74,7 @@ func TestMergeKernelFuzzConfigs(t *testing.T) {
 				FuzzConfig: &api.FuzzConfig{
 					Track: "KMSAN",
 					Focus: []string{"net"},
+					KMSAN: true,
 				},
 			},
 		}, MergeKernelFuzzConfigs([]*api.KernelFuzzConfig{
@@ -86,6 +87,7 @@ func TestMergeKernelFuzzConfigs(t *testing.T) {
 				Track:        "KMSAN",
 				KernelConfig: "kmsan_config",
 				Focus:        "net",
+				KMSAN:        true,
 			},
 		}))
 	})