netdev - [PATCH wpan-next] mac802154: Avoid superfluous endianness handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230130154306.114265-1-miquel.raynal@bootlin.com>
Date:   Mon, 30 Jan 2023 16:43:06 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Guilhem Imberton <guilhem.imberton@...vo.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH wpan-next] mac802154: Avoid superfluous endianness handling

When compiling scan.c with C=1, Sparse complains with:

   sparse:     expected unsigned short [usertype] val
   sparse:     got restricted __le16 [usertype] pan_id
   sparse: sparse: cast from restricted __le16

   sparse:     expected unsigned long long [usertype] val
   sparse:     got restricted __le64 [usertype] extended_addr
   sparse: sparse: cast from restricted __le64

The tool is right, both pan_id and extended_addr already are rightfully
defined as being __le16 and __le64 on both sides of the operations and
do not require extra endianness handling.

Fixes: 3accf4762734 ("mac802154: Handle basic beaconing")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
 net/mac802154/scan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mac802154/scan.c b/net/mac802154/scan.c
index cfbe20b1ec5e..8f98efec7753 100644
--- a/net/mac802154/scan.c
+++ b/net/mac802154/scan.c
@@ -419,8 +419,8 @@ int mac802154_send_beacons_locked(struct ieee802154_sub_if_data *sdata,
 	local->beacon.mhr.fc.source_addr_mode = IEEE802154_EXTENDED_ADDRESSING;
 	atomic_set(&request->wpan_dev->bsn, -1);
 	local->beacon.mhr.source.mode = IEEE802154_ADDR_LONG;
-	local->beacon.mhr.source.pan_id = cpu_to_le16(request->wpan_dev->pan_id);
-	local->beacon.mhr.source.extended_addr = cpu_to_le64(request->wpan_dev->extended_addr);
+	local->beacon.mhr.source.pan_id = request->wpan_dev->pan_id;
+	local->beacon.mhr.source.extended_addr = request->wpan_dev->extended_addr;
 	local->beacon.mac_pl.beacon_order = request->interval;
 	local->beacon.mac_pl.superframe_order = request->interval;
 	local->beacon.mac_pl.final_cap_slot = 0xf;
-- 
2.34.1