librt -- aio: lio_listio: Do not dereference NULL sigevp.

Reported-by: Z`

diff --git a/lib/librt/aio.c b/lib/librt/aio.c
index 8c1d19b..3823714 100644 (file)
--- a/lib/librt/aio.c
+++ b/lib/librt/aio.c
@@ -157,7 +157,8 @@ lio_listio(int mode, struct aiocb *const apv[], int nent,
        int i;
 
 #ifndef notyet
-       if ((sigevp->sigev_notify != SIGEV_NONE) &&
+       if (sigevp &&
+           (sigevp->sigev_notify != SIGEV_NONE) &&
            (sigevp->sigev_notify != SIGEV_THREAD))
                return (ENOSYS);
 #endif