From 97042d0a75a1220bc2bb8f3cc99f3f72b1f81607 Mon Sep 17 00:00:00 2001 From: Haowen Bai Date: Thu, 21 Apr 2022 16:21:17 +0800 Subject: [PATCH] staging: rtl8192e: Fix signedness bug in rtllib_rx_assoc_resp() The rtllib_rx_assoc_resp() function has a signedness bug because it's a declared as a u16 but it return -ENOMEM. When you look at it more closely it returns a mix of error codes including 0xcafe, -ENOMEM, and a->status which is WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG. This is a mess. Clean it up to just return standard kernel error codes. We can print out the a->status before returning a regular error code. The printks in the caller need to be adjusted as well. Reviewed-by: Dan Carpenter Signed-off-by: Haowen Bai Link: https://lore.kernel.org/r/1650529277-7893-1-git-send-email-baihaowen@meizu.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8192e/rtllib_softmac.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/staging/rtl8192e/rtllib_softmac.c b/drivers/staging/rtl8192e/rtllib_softmac.c index 2016d121f7ad4..aab131bdb0525 100644 --- a/drivers/staging/rtl8192e/rtllib_softmac.c +++ b/drivers/staging/rtl8192e/rtllib_softmac.c @@ -1764,7 +1764,7 @@ static void rtllib_softmac_check_all_nets(struct rtllib_device *ieee) spin_unlock_irqrestore(&ieee->lock, flags); } -static inline u16 auth_parse(struct net_device *dev, struct sk_buff *skb, +static inline int auth_parse(struct net_device *dev, struct sk_buff *skb, u8 **challenge, int *chlen) { struct rtllib_authentication *a; @@ -1773,7 +1773,7 @@ static inline u16 auth_parse(struct net_device *dev, struct sk_buff *skb, if (skb->len < (sizeof(struct rtllib_authentication) - sizeof(struct rtllib_info_element))) { netdev_dbg(dev, "invalid len in auth resp: %d\n", skb->len); - return 0xcafe; + return -EINVAL; } *challenge = NULL; a = (struct rtllib_authentication *)skb->data; @@ -1787,7 +1787,13 @@ static inline u16 auth_parse(struct net_device *dev, struct sk_buff *skb, return -ENOMEM; } } - return le16_to_cpu(a->status); + + if (a->status) { + netdev_dbg(dev, "auth_parse() failed\n"); + return -EINVAL; + } + + return 0; } static int auth_rq_parse(struct net_device *dev, struct sk_buff *skb, u8 *dest) @@ -2282,7 +2288,7 @@ rtllib_rx_assoc_resp(struct rtllib_device *ieee, struct sk_buff *skb, static void rtllib_rx_auth_resp(struct rtllib_device *ieee, struct sk_buff *skb) { - u16 errcode; + int errcode; u8 *challenge; int chlen = 0; bool bSupportNmode = true, bHalfSupportNmode = false; @@ -2292,8 +2298,7 @@ static void rtllib_rx_auth_resp(struct rtllib_device *ieee, struct sk_buff *skb) if (errcode) { ieee->softmac_stats.rx_auth_rs_err++; netdev_info(ieee->dev, - "Authentication response status code 0x%x", - errcode); + "Authentication response status code %d", errcode); rtllib_associate_abort(ieee); return; } -- 2.30.2