diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c
index bbae584..60db105 100644
--- a/src/backend/access/transam/slru.c
+++ b/src/backend/access/transam/slru.c
@@ -212,6 +212,10 @@ SimpleLruInit(SlruCtl ctl, const char *name, int nslots, int nlsns,
 
 		/* Initialize LWLocks */
 		shared->buffer_locks = (LWLockPadded *) ShmemAlloc(sizeof(LWLockPadded) * nslots);
+		if (!shared->buffer_locks)
+			   ereport(FATAL,
+					   (errcode(ERRCODE_OUT_OF_MEMORY),
+						errmsg("out of shared memory")));
 
 		Assert(strlen(name) + 1 < SLRU_MAX_NAME_LENGTH);
 		strlcpy(shared->lwlock_tranche_name, name, SLRU_MAX_NAME_LENGTH);
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index a28e215..9a6af9f 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -6096,6 +6096,12 @@ ShmemBackendArrayAllocation(void)
 	Size		size = ShmemBackendArraySize();
 
 	ShmemBackendArray = (Backend *) ShmemAlloc(size);
+
+	if (!ShmemBackendArray)
+		ereport(FATAL,
+				(errcode(ERRCODE_OUT_OF_MEMORY),
+				 errmsg("out of shared memory")));
+
 	/* Mark all slots as empty */
 	memset(ShmemBackendArray, 0, size);
 }
diff --git a/src/backend/storage/lmgr/lwlock.c b/src/backend/storage/lmgr/lwlock.c
index 53b45d7..6cf8581 100644
--- a/src/backend/storage/lmgr/lwlock.c
+++ b/src/backend/storage/lmgr/lwlock.c
@@ -426,6 +426,10 @@ CreateLWLocks(void)
 
 		/* Allocate space */
 		ptr = (char *) ShmemAlloc(spaceLocks);
+		if (!ptr)
+			ereport(FATAL,
+					(errcode(ERRCODE_OUT_OF_MEMORY),
+					 errmsg("out of shared memory")));
 
 		/* Leave room for dynamic allocation of tranches */
 		ptr += sizeof(int);
diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c
index 9a758bd..afebfb7 100644
--- a/src/backend/storage/lmgr/proc.c
+++ b/src/backend/storage/lmgr/proc.c
@@ -212,6 +212,10 @@ InitProcGlobal(void)
 	 * structure.
 	 */
 	pgxacts = (PGXACT *) ShmemAlloc(TotalProcs * sizeof(PGXACT));
+	if (!pgxacts)
+		ereport(FATAL,
+				(errcode(ERRCODE_OUT_OF_MEMORY),
+				 errmsg("out of shared memory")));
 	MemSet(pgxacts, 0, TotalProcs * sizeof(PGXACT));
 	ProcGlobal->allPgXact = pgxacts;
 
@@ -279,6 +283,10 @@ InitProcGlobal(void)
 
 	/* Create ProcStructLock spinlock, too */
 	ProcStructLock = (slock_t *) ShmemAlloc(sizeof(slock_t));
+	if (!ProcStructLock)
+		ereport(FATAL,
+				(errcode(ERRCODE_OUT_OF_MEMORY),
+				 errmsg("out of shared memory")));
 	SpinLockInit(ProcStructLock);
 }