From: Michael Guralnik <michaelgur@mellanox.com>
Date: Wed, 8 Jan 2020 18:05:35 +0000 (+0200)
Subject: RDMA/uverbs: Verify MR access flags
X-Git-Tag: v4.19.104~49
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eb22d5e307d80bd09dcdab187b904de2f53c56c0;p=platform%2Fkernel%2Flinux-rpi.git

RDMA/uverbs: Verify MR access flags

commit ca95c1411198c2d87217c19d44571052cdc94725 upstream.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 54e4d1f..874cd6e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -3864,6 +3864,9 @@ 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;
 }