linux-kernel - [PATCH AUTOSEL 4.14 11/13] staging: rtl8192u: Fix return type of ieee80211

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

Message-Id: <20221013002716.1895839-11-sashal@kernel.org>
Date:   Wed, 12 Oct 2022 20:27:10 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Nathan Huckleberry <nhuck@...gle.com>, llvm@...ts.linux.dev,
        Dan Carpenter <error27@...il.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, ndesaulniers@...gle.com,
        ztong0001@...il.com, dave@...olabs.net,
        linux-staging@...ts.linux.dev
Subject: [PATCH AUTOSEL 4.14 11/13] staging: rtl8192u: Fix return type of ieee80211_xmit

From: Nathan Huckleberry <nhuck@...gle.com>

[ Upstream commit 2851349ac351010a2649e0ff86a1e3d68fe5d683 ]

The ndo_start_xmit field in net_device_ops is expected to be of type
netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev).

The mismatched return type breaks forward edge kCFI since the underlying
function definition does not match the function hook definition.

The return type of ieee80211_xmit should be changed from int to
netdev_tx_t.

Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: llvm@...ts.linux.dev
Reported-by: Dan Carpenter <error27@...il.com>
Reviewed-by: Nathan Chancellor <nathan@...nel.org>
Signed-off-by: Nathan Huckleberry <nhuck@...gle.com>
Link: https://lore.kernel.org/r/20220914210750.423048-1-nhuck@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/staging/rtl8192u/ieee80211/ieee80211.h    | 2 +-
 drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211.h b/drivers/staging/rtl8192u/ieee80211/ieee80211.h
index b062cad052b9..2e768e21e26b 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211.h
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211.h
@@ -2186,7 +2186,7 @@ int ieee80211_set_encryption(struct ieee80211_device *ieee);
 int ieee80211_encrypt_fragment(struct ieee80211_device *ieee,
 			       struct sk_buff *frag, int hdr_len);
 
-int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev);
+netdev_tx_t ieee80211_xmit(struct sk_buff *skb, struct net_device *dev);
 void ieee80211_txb_free(struct ieee80211_txb *txb);
 
 
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
index f58971a4a2e3..70cc158d79bc 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
@@ -594,7 +594,7 @@ static void ieee80211_query_seqnum(struct ieee80211_device *ieee,
 	}
 }
 
-int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
+netdev_tx_t ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ieee80211_device *ieee = netdev_priv(dev);
 	struct ieee80211_txb *txb = NULL;
@@ -902,13 +902,13 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
 			if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
 				stats->tx_packets++;
 				stats->tx_bytes += __le16_to_cpu(txb->payload_size);
-				return 0;
+				return NETDEV_TX_OK;
 			}
 			ieee80211_txb_free(txb);
 		}
 	}
 
-	return 0;
+	return NETDEV_TX_OK;
 
  failed:
 	spin_unlock_irqrestore(&ieee->lock, flags);
-- 
2.35.1