From 89c734e1980259e439f3c57f1e63729dc0038740 Mon Sep 17 00:00:00 2001 From: Haowen Bai Date: Fri, 22 Apr 2022 10:10:35 +0800 Subject: [PATCH] staging: rtl8192u: Fix signedness bug in ieee80211_check_auth_response() The ieee80211_check_auth_response() 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. Signed-off-by: Haowen Bai Link: https://lore.kernel.org/r/1650593435-9017-1-git-send-email-baihaowen@meizu.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c index f0ee018..7fdce75 100644 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c @@ -1461,13 +1461,13 @@ void ieee80211_softmac_check_all_nets(struct ieee80211_device *ieee) spin_unlock_irqrestore(&ieee->lock, flags); } -static inline u16 auth_parse(struct sk_buff *skb, u8 **challenge, int *chlen) +static inline int auth_parse(struct sk_buff *skb, u8 **challenge, int *chlen) { struct ieee80211_authentication *a; u8 *t; if (skb->len < (sizeof(struct ieee80211_authentication) - sizeof(struct ieee80211_info_element))) { IEEE80211_DEBUG_MGMT("invalid len in auth resp: %d\n", skb->len); - return 0xcafe; + return -EINVAL; } *challenge = NULL; a = (struct ieee80211_authentication *)skb->data; @@ -1482,7 +1482,12 @@ static inline u16 auth_parse(struct sk_buff *skb, u8 **challenge, int *chlen) } } - return le16_to_cpu(a->status); + if (a->status) { + IEEE80211_DEBUG_MGMT("auth_parse() failed\n"); + return -EINVAL; + } + + return 0; } static int auth_rq_parse(struct sk_buff *skb, u8 *dest) @@ -1829,7 +1834,7 @@ static void ieee80211_check_auth_response(struct ieee80211_device *ieee, { /* default support N mode, disable halfNmode */ bool bSupportNmode = true, bHalfSupportNmode = false; - u16 errcode; + int errcode; u8 *challenge; int chlen = 0; u32 iotAction; @@ -1878,7 +1883,7 @@ static void ieee80211_check_auth_response(struct ieee80211_device *ieee, } } else { ieee->softmac_stats.rx_auth_rs_err++; - IEEE80211_DEBUG_MGMT("Auth response status code 0x%x", errcode); + IEEE80211_DEBUG_MGMT("Auth response status code %d\n", errcode); ieee80211_associate_abort(ieee); } } -- 2.7.4