linux-kernel - [PATCH 5.14 320/432] selftests: nci: Fix the code for next nlattr offset

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Message-Id: <20210916155821.683964062@linuxfoundation.org>
Date:   Thu, 16 Sep 2021 18:01:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bongsu Jeon <bongsu.jeon@...sung.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 320/432] selftests: nci: Fix the code for next nlattr offset

From: Bongsu Jeon <bongsu.jeon@...sung.com>

[ Upstream commit 78a7b2a8a0fa31f63ac16ac13601db6ed8259dfc ]

nlattr could have a padding for 4 bytes alignment. So next nla's offset
should be calculated with a padding.

Signed-off-by: Bongsu Jeon <bongsu.jeon@...sung.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/testing/selftests/nci/nci_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/nci/nci_dev.c b/tools/testing/selftests/nci/nci_dev.c
index 57b505cb1561..9687100f15ea 100644
--- a/tools/testing/selftests/nci/nci_dev.c
+++ b/tools/testing/selftests/nci/nci_dev.c
@@ -113,8 +113,8 @@ static int send_cmd_mt_nla(int sd, __u16 nlmsg_type, __u32 nlmsg_pid,
 		if (nla_len > 0)
 			memcpy(NLA_DATA(na), nla_data[cnt], nla_len[cnt]);
 
-		msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);
-		prv_len = na->nla_len;
+		prv_len = NLA_ALIGN(nla_len[cnt]) + NLA_HDRLEN;
+		msg.n.nlmsg_len += prv_len;
 	}
 
 	buf = (char *)&msg;
-- 
2.30.2