diff --git a/libfreerdp/common/assistance.c b/libfreerdp/common/assistance.c
index 212e8467b..5161411e6 100644
--- a/libfreerdp/common/assistance.c
+++ b/libfreerdp/common/assistance.c
@@ -1225,9 +1225,8 @@ int freerdp_assistance_parse_file_buffer(rdpAssistanceFile* file, const char* cb
 
 int freerdp_assistance_parse_file(rdpAssistanceFile* file, const char* name, const char* password)
 {
-	int status = 0;
+	int status = -1;
 	BYTE* buffer = nullptr;
-	FILE* fp = nullptr;
 	size_t readSize = 0;
 	union
 	{
@@ -1238,7 +1237,7 @@ int freerdp_assistance_parse_file(rdpAssistanceFile* file, const char* name, con
 	if (!update_name(file, name))
 		return -1;
 
-	fp = winpr_fopen(name, "r");
+	FILE* fp = winpr_fopen(name, "r");
 
 	if (!fp)
 	{
@@ -1246,24 +1245,22 @@ int freerdp_assistance_parse_file(rdpAssistanceFile* file, const char* name, con
 		return -1;
 	}
 
-	(void)_fseeki64(fp, 0, SEEK_END);
+	if (_fseeki64(fp, 0, SEEK_END) < 0)
+		goto fail;
 	fileSize.i64 = _ftelli64(fp);
-	(void)_fseeki64(fp, 0, SEEK_SET);
+	if (_fseeki64(fp, 0, SEEK_SET) < 0)
+		goto fail;
 
 	if (fileSize.i64 < 1)
 	{
 		WLog_ERR(TAG, "Failed to read ASSISTANCE file %s ", name);
-		(void)fclose(fp);
-		return -1;
+		goto fail;
 	}
 
 	buffer = (BYTE*)malloc(fileSize.s + 2);
 
 	if (!buffer)
-	{
-		(void)fclose(fp);
-		return -1;
-	}
+		goto fail;
 
 	readSize = fread(buffer, fileSize.s, 1, fp);
 
@@ -1273,19 +1270,18 @@ int freerdp_assistance_parse_file(rdpAssistanceFile* file, const char* name, con
 			readSize = fileSize.s;
 	}
 
-	(void)fclose(fp);
-
 	if (readSize < 1)
 	{
 		WLog_ERR(TAG, "Failed to read ASSISTANCE file %s ", name);
-		free(buffer);
-		buffer = nullptr;
-		return -1;
+		goto fail;
 	}
 
 	buffer[fileSize.s] = '\0';
 	buffer[fileSize.s + 1] = '\0';
 	status = freerdp_assistance_parse_file_buffer(file, (char*)buffer, fileSize.s, password);
+
+fail:
+	(void)fclose(fp);
 	free(buffer);
 	return status;
 }
diff --git a/libfreerdp/core/multitransport.c b/libfreerdp/core/multitransport.c
index df12ea45d..f4fbfea25 100644
--- a/libfreerdp/core/multitransport.c
+++ b/libfreerdp/core/multitransport.c
@@ -85,7 +85,8 @@ state_run_t multitransport_recv_request(rdpMultitransport* multi, wStream* s)
 		WLog_WARN(TAG,
 		          "reserved is %" PRIu16 " instead of 0, skipping %" PRIuz "bytes of unknown data",
 		          reserved, Stream_GetRemainingLength(s));
-		(void)Stream_SafeSeek(s, Stream_GetRemainingLength(s));
+		if (!Stream_SafeSeek(s, Stream_GetRemainingLength(s)))
+			return STATE_RUN_FAILED;
 	}
 
 	WINPR_ASSERT(multi->MtRequest);
diff --git a/libfreerdp/core/smartcardlogon.c b/libfreerdp/core/smartcardlogon.c
index 468bb32ee..23ee66c0e 100644
--- a/libfreerdp/core/smartcardlogon.c
+++ b/libfreerdp/core/smartcardlogon.c
@@ -58,15 +58,16 @@ static void delete_file(char* path)
 			int rs = _fseeki64(fp, 0, SEEK_END);
 			if (rs == 0)
 				size = _ftelli64(fp);
-			(void)_fseeki64(fp, 0, SEEK_SET);
-
-			for (INT64 x = 0; x < size; x += sizeof(buffer))
+			if (_fseeki64(fp, 0, SEEK_SET) == 0)
 			{
-				const size_t dnmemb = (size_t)(size - x);
-				const size_t nmemb = MIN(sizeof(buffer), dnmemb);
-				const size_t count = fwrite(buffer, nmemb, 1, fp);
-				if (count != 1)
-					break;
+				for (INT64 x = 0; x < size; x += sizeof(buffer))
+				{
+					const size_t dnmemb = (size_t)(size - x);
+					const size_t nmemb = MIN(sizeof(buffer), dnmemb);
+					const size_t count = fwrite(buffer, nmemb, 1, fp);
+					if (count != 1)
+						break;
+				}
 			}
 
 			(void)fclose(fp);
diff --git a/libfreerdp/core/streamdump.c b/libfreerdp/core/streamdump.c
index 01829c69e..1b2176cf2 100644
--- a/libfreerdp/core/streamdump.c
+++ b/libfreerdp/core/streamdump.c
@@ -79,7 +79,10 @@ static
 		return FALSE;
 
 	if (pOffset)
-		(void)_fseeki64(fp, WINPR_ASSERTING_INT_CAST(int64_t, *pOffset), SEEK_SET);
+	{
+		if (_fseeki64(fp, WINPR_ASSERTING_INT_CAST(int64_t, *pOffset), SEEK_SET) < 0)
+			goto fail;
+	}
 
 	r = fread(&ts, 1, sizeof(ts), fp);
 	if (r != sizeof(ts))