diff --git a/ipc/shm.c b/ipc/shm.c
index 9e51bf2..89fc354 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -493,6 +493,9 @@
 	if (size < SHMMIN || size > ns->shm_ctlmax)
 		return -EINVAL;
 
+	if (numpages << PAGE_SHIFT < size)
+		return -ENOSPC;
+
 	if (ns->shm_tot + numpages < ns->shm_tot ||
 			ns->shm_tot + numpages > ns->shm_ctlall)
 		return -ENOSPC;