1 files changed, 1 insertions, 2 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index cb2cedaa8808..a0ed957cefc9 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1288,8 +1288,7 @@ SYSCALL_DEFINE1(shmdt, char __user *, shmaddr)
 #else /* CONFIG_MMU */
         /* under NOMMU conditions, the exact address to be destroyed must be
          * given */
-        retval = -EINVAL;
-        if (vma->vm_start == addr && vma->vm_ops == &shm_vm_ops) {
+        if (vma && vma->vm_start == addr && vma->vm_ops == &shm_vm_ops) {
                 do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start);
                 retval = 0;
         }