X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=src%2Flib%2Flttng-ust%2Flttng-bytecode-validator.c;h=d727270ae7bcd10bc89eddfbbdacf1ff887cb8ec;hb=bddade91e51d3f26fef22c7fe5dca5b22d59012a;hp=1a3649c16080cd57bdc2170390fb0bffc3aea920;hpb=ba08b9fce68c0e9c31a860c3453983d3093f3eae;p=lttng-ust.git

diff --git a/src/lib/lttng-ust/lttng-bytecode-validator.c b/src/lib/lttng-ust/lttng-bytecode-validator.c
index 1a3649c1..d727270a 100644
--- a/src/lib/lttng-ust/lttng-bytecode-validator.c
+++ b/src/lib/lttng-ust/lttng-bytecode-validator.c
@@ -1104,60 +1104,28 @@ int validate_instruction_context(
 		dbg_printf("Validate load field\n");
 		break;
 	}
+
+	/*
+	 * Disallow already specialized bytecode op load field instructions to
+	 * ensure that the received bytecode does not read a memory area larger
+	 * than the memory targeted by the instrumentation.
+	 */
 	case BYTECODE_OP_LOAD_FIELD_S8:
-	{
-		dbg_printf("Validate load field s8\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_S16:
-	{
-		dbg_printf("Validate load field s16\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_S32:
-	{
-		dbg_printf("Validate load field s32\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_S64:
-	{
-		dbg_printf("Validate load field s64\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_U8:
-	{
-		dbg_printf("Validate load field u8\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_U16:
-	{
-		dbg_printf("Validate load field u16\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_U32:
-	{
-		dbg_printf("Validate load field u32\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_U64:
-	{
-		dbg_printf("Validate load field u64\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_STRING:
-	{
-		dbg_printf("Validate load field string\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_SEQUENCE:
-	{
-		dbg_printf("Validate load field sequence\n");
-		break;
-	}
 	case BYTECODE_OP_LOAD_FIELD_DOUBLE:
 	{
-		dbg_printf("Validate load field double\n");
-		break;
+		dbg_printf("Validate load field, reject specialized load instruction (%d)\n",
+				(int) opcode);
+		ret = -EINVAL;
+		goto end;
 	}
 
 	case BYTECODE_OP_GET_SYMBOL: