Fix various null-derefs.

Author: wargio

librz/arch/analysis.c

@@ -1248,12 +1248,17 @@ RZ_API void rz_analysis_purge_imports(RzAnalysis *analysis) {
 
 RZ_DEPRECATE RZ_API RZ_BORROW RzAnalysisEsilInterState *rz_analysis_get_esil_inter_state(RZ_NONNULL RzAnalysis *analysis) {
 	rz_return_val_if_fail(analysis, NULL);
+	if (!analysis->esil) {
+		return NULL;
+	}
 	return analysis->esil->esilinterstate;
 }
 
 RZ_DEPRECATE RZ_API void rz_analysis_set_esil_inter_state(RZ_NONNULL RzAnalysis *analysis, RZ_NULLABLE RzAnalysisEsilInterState *esilinterstate) {
 	rz_return_if_fail(analysis);
-	analysis->esil->esilinterstate = esilinterstate;
+	if (analysis->esil) {
+		analysis->esil->esilinterstate = esilinterstate;
+	}
 }
 
 RZ_DEPRECATE RZ_API RZ_BORROW RzAnalysisEsil *rz_analysis_get_esil(RZ_NONNULL RzAnalysis *analysis) {

librz/core/cesil.c

@@ -1235,9 +1235,9 @@ RZ_API void rz_core_analysis_esil(RzCore *core, ut64 addr, ut64 size, RZ_NULLABL
 	bool cfg_analysis_strings = rz_config_get_i(core->config, "analysis.strings");
 	bool emu_lazy = rz_config_get_i(core->config, "emu.lazy");
 	bool gp_fixed = rz_config_get_i(core->config, "analysis.gpfixed");
-	RzAnalysisEsilInterState *estate = rz_analysis_get_esil_inter_state(core->analysis);
 	ut64 refptr = 0LL;
 	const char *pcname;
+	RzAnalysisEsilInterState *estate = NULL;
 	RzAnalysisOp op = RZ_EMPTY;
 	ut8 *buf = NULL;
 	ut64 iend;
@@ -1261,7 +1261,6 @@ RZ_API void rz_core_analysis_esil(RzCore *core, ut64 addr, ut64 size, RZ_NULLABL
 		RZ_LOG_ERROR("core: cannot allocate %" PFMT64u "\n", (iend + 2));
 		return;
 	}
-	estate->last_read = UT64_MAX;
 	rz_io_read_at_mapped(core->io, start, buf, iend + 1);
 	rz_reg_arena_push(rreg);
 
@@ -1275,6 +1274,8 @@ RZ_API void rz_core_analysis_esil(RzCore *core, ut64 addr, ut64 size, RZ_NULLABL
 		}
 		rz_core_analysis_esil_init_mem(core, NULL, UT64_MAX, UT32_MAX);
 	}
+	estate = rz_analysis_get_esil_inter_state(core->analysis);
+	estate->last_read = UT64_MAX;
 	const char *spname = rz_reg_get_name(rreg, RZ_REG_NAME_SP);
 	EsilBreakCtx ctx = {
 		.op = &op,