1 files changed, 2 insertions, 1 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index dda8f1ff3c35..9e51bf246344 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -493,7 +493,8 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
         if (size < SHMMIN || size > ns->shm_ctlmax)
                 return -EINVAL;
 
-        if (ns->shm_tot + numpages > ns->shm_ctlall)
+        if (ns->shm_tot + numpages < ns->shm_tot ||
+                        ns->shm_tot + numpages > ns->shm_ctlall)
                 return -ENOSPC;
 
         shp = ipc_rcu_alloc(sizeof(*shp));