RDMA/uverbs: Verify MR access flags

Verify that MR access flags that are passed from user are all supported
ones, otherwise an error is returned.

Fixes: 4fca03778351 ("IB/uverbs: Move ib_access_flags and ib_read_counters_flags to uapi")
Link: https://lore.kernel.org/r/1578506740-22188-6-git-send-email-yishaih@mellanox.com
Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index d8031f6..b20b89e 100644 (file)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4310,6 +4310,9 @@ static inline int ib_check_mr_access(int flags)
            !(flags & IB_ACCESS_LOCAL_WRITE))
                return -EINVAL;
 
+       if (flags & ~IB_ACCESS_SUPPORTED)
+               return -EINVAL;
+
        return 0;
 }