Klocwork: Fix the Null pointer derefernce found by klocwork

Signed-off-by: Thejaswani Putta <thejaswani.putta@intel.com>
Change-Id: I15973ac28e9645826986cf63d2160eedb83024e4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32290
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/lib/string.c

@@ -6,7 +6,8 @@ char *strdup(const char *s)
 {
 	size_t sz = strlen(s) + 1;
 	char *d = malloc(sz);
-	memcpy(d, s, sz);
+	if (d)
+		memcpy(d, s, sz);
 	return d;
 }
 
@@ -15,7 +16,9 @@ char *strconcat(const char *s1, const char *s2)
 	size_t sz_1 = strlen(s1);
 	size_t sz_2 = strlen(s2);
 	char *d = malloc(sz_1 + sz_2 + 1);
-	memcpy(d, s1, sz_1);
+	if (d) {
-	memcpy(d + sz_1, s2, sz_2 + 1);
+		memcpy(d, s1, sz_1);
+		memcpy(d + sz_1, s2, sz_2 + 1);
+	}
 	return d;
 }

src/soc/intel/broadwell/ramstage.c

@@ -23,6 +23,7 @@
 #include <soc/ramstage.h>
 #include <soc/intel/broadwell/chip.h>
 #include <soc/intel/common/acpi.h>
+#include <assert.h>
 
 /* Save wake source information for calculating ACPI _SWS values */
 int soc_fill_acpi_wake(uint32_t *pm1, uint32_t **gpe0)
@@ -31,6 +32,8 @@ int soc_fill_acpi_wake(uint32_t *pm1, uint32_t **gpe0)
 	static uint32_t gpe0_sts[GPE0_REG_MAX];
 	int i;
 
+	assert(ps != NULL);
+
 	*pm1 = ps->pm1_sts & ps->pm1_en;
 
 	/* Mask off GPE0 status bits that are not enabled */

util/cbfstool/cbfs_sections.c

@@ -14,6 +14,7 @@
  */
 
 #include "cbfs_sections.h"
+#include "common.h"
 
 #include <assert.h>
 #include <stdlib.h>
@@ -65,6 +66,10 @@ bool fmd_process_flag_cbfs(const struct flashmap_descriptor *node)
 		return false;
 
 	list_node = (struct descriptor_node *)malloc(sizeof(*list_node));
+	if (!list_node) {
+		ERROR("Cannot allocate CBFS flag node!\n");
+		return false;
+	}
 	list_node->val = node;
 	list_node->next = NULL;