From: Michael Guralnik <michaelgur@mellanox.com>
Date: Wed, 8 Jan 2020 20:05:35 +0200
Subject: RDMA/uverbs: Verify MR access flags
Patch-mainline: v5.6-rc1
Git-commit: ca95c1411198c2d87217c19d44571052cdc94725
References: bsc#1103992 FATE#326009
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/rdma/ib_verbs.h | 3 +++
1 file changed, 3 insertions(+)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -3907,6 +3907,9 @@ static inline int ib_check_mr_access(int
!(flags & IB_ACCESS_LOCAL_WRITE))
return -EINVAL;
+ if (flags & ~IB_ACCESS_SUPPORTED)
+ return -EINVAL;
+
return 0;
}