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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Hyunchul Lee <hyc.lee@gmail.com>,
        Steve French <stfrench@microsoft.com>,
        Sasha Levin <sashal@kernel.org>, linux-cifs@vger.kernel.org,
        samba-technical@lists.samba.org
Subject: [PATCH AUTOSEL 5.10 14/17] cifs: fix the out of range assignment to bit fields in parse_server_interfaces
Date:   Thu, 22 Jul 2021 23:57:45 -0400
Message-Id: <20210723035748.531594-14-sashal@kernel.org>
In-Reply-To: <20210723035748.531594-1-sashal@kernel.org>
References: <20210723035748.531594-1-sashal@kernel.org>
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From: Hyunchul Lee <hyc.lee@gmail.com>

[ Upstream commit c9c9c6815f9004ee1ec87401ed0796853bd70f1b ]

Because the out of range assignment to bit fields
are compiler-dependant, the fields could have wrong
value.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/cifs/smb2ops.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index f6ceb79a995d..f17ff2c9e526 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -497,8 +497,8 @@ parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 	p = buf;
 	while (bytes_left >= sizeof(*p)) {
 		info->speed = le64_to_cpu(p->LinkSpeed);
-		info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
-		info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
+		info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
+		info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 
 		cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 		cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
-- 
2.30.2