Changeset 75881 in vbox

Timestamp:

Dec 2, 2018 7:03:03 PM (6 years ago)

Author:

vboxsync

Message:

Runtime/r3/shmem-posix.cpp: Crash fix in RTShMemMapRegion

File:

• trunk/src/VBox/Runtime/r3/posix/shmem-posix.cpp (modified) (2 diffs)

trunk/src/VBox/Runtime/r3/posix/shmem-posix.cpp

@@ -292 +292 @@
             if (!pThis->aMappingDescs[i].cMappings)
             {
+                pMappingDesc = &pThis->aMappingDescs[i];
+
                 /* Try to grab this one. */
                 if (ASMAtomicIncU32(&pMappingDesc->cMappings) == 1)
@@ -298 +300 @@
                 /* Somebody raced us, drop reference and continue. */
                 ASMAtomicDecU32(&pMappingDesc->cMappings);
+                pMappingDesc = NULL;
             }
         }