sys/targets: arm64: compile with -fno-jump-tables

Prevent the compiler from generating jump tables that may kick in at random places and break SyzOS execution (google#5565)
ramosian-glider · Dec 3, 2024 · 4594620 · 4594620
1 parent 62300cc
commit 4594620
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/sys/targets/targets.go b/sys/targets/targets.go
@@ -291,8 +291,11 @@ var List = map[string]map[string]*Target{
 			KernelHeaderArch: "x86",
 		},
 		ARM64: {
-			PtrSize:          8,
-			PageSize:         4 << 10,
+			PtrSize:  8,
+			PageSize: 4 << 10,
+			// Jump tables mess up with SyzOS execution, disable them for now.
+			// See https://github.com/google/syzkaller/issues/5565 for context.
+			CFlags:           []string{"-fno-jump-tables"},
 			Triple:           "aarch64-linux-gnu",
 			KernelArch:       "arm64",
 			KernelHeaderArch: "arm64",