Let the IOhandler successfully created by cmsOpenIOhandlerFromMem alw…

…ays has a valid Block
mm2 · Apr 12, 2024 · a2862d0 · a2862d0
1 parent 6491e2e
commit a2862d0
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/cmsio0.c b/src/cmsio0.c
@@ -197,7 +197,7 @@ cmsBool MemoryWrite(struct _cms_io_handler* iohandler, cmsUInt32Number size, con
 {
     FILEMEM* ResData = (FILEMEM*) iohandler ->stream;
 
-    if (ResData == NULL) return FALSE; // Housekeeping
+    if (ResData == NULL || ResData ->Block == NULL) return FALSE; // Housekeeping
 
     // Check for available space. Clip.
     if (ResData->Pointer + size > ResData->Size) {
@@ -275,7 +275,7 @@ cmsIOHANDLER* CMSEXPORT cmsOpenIOhandlerFromMem(cmsContext ContextID, void *Buff
 
     case 'w':
         fm = (FILEMEM*) _cmsMallocZero(ContextID, sizeof(FILEMEM));
-        if (fm == NULL) goto Error;
+        if (fm == NULL || Buffer == NULL) goto Error;
 
         fm ->Block = (cmsUInt8Number*) Buffer;
         fm ->FreeBlockOnClose = FALSE;