1 files changed, 8 insertions, 1 deletions
diff --git a/ext/lsm1/lsm_unix.c b/ext/lsm1/lsm_unix.c
index 22240771e..88952d15f 100644
--- a/ext/lsm1/lsm_unix.c
+++ b/ext/lsm1/lsm_unix.c
@@ -228,6 +228,10 @@ static int lsmPosixOsRemap(
     }
 
     p->pMap = mmap(0, iSz, PROT_READ|PROT_WRITE, MAP_SHARED, p->fd, 0);
+    if( p->pMap==MAP_FAILED ){
+      p->pMap = 0;
+      return LSM_IOERR_BKPT;
+    }
     p->nMap = iSz;
   }
 
@@ -413,7 +417,10 @@ static int lsmPosixOsShmMap(lsm_file *pFile, int iChunk, int sz, void **ppShm){
     p->apShm[iChunk] = mmap(0, LSM_SHM_CHUNK_SIZE, 
         PROT_READ|PROT_WRITE, MAP_SHARED, p->shmfd, iChunk*LSM_SHM_CHUNK_SIZE
     );
-    if( p->apShm[iChunk]==0 ) return LSM_IOERR_BKPT;
+    if( p->apShm[iChunk]==MAP_FAILED ){
+      p->apShm[iChunk] = 0;
+      return LSM_IOERR_BKPT;
+    }
   }
 
   *ppShm = p->apShm[iChunk];