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    Subject[PATCH AUTOSEL 5.5 391/542] RDMA/uverbs: Verify MR access flags
    Date
    From: Michael Guralnik <michaelgur@mellanox.com>

    [ Upstream commit ca95c1411198c2d87217c19d44571052cdc94725 ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    include/rdma/ib_verbs.h | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
    index cb02d36d41d22..a14f837fb1c84 100644
    --- a/include/rdma/ib_verbs.h
    +++ b/include/rdma/ib_verbs.h
    @@ -4303,6 +4303,9 @@ 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;
    }

    --
    2.20.1
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