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Message-Id: <20190315170433.3845-1-kjlu@umn.edu>
Date: Fri, 15 Mar 2019 12:04:32 -0500
From: Kangjie Lu <kjlu@....edu>
To: kjlu@....edu
Cc: pakki001@....edu, Arend van Spriel <arend.vanspriel@...adcom.com>,
Franky Lin <franky.lin@...adcom.com>,
Hante Meuleman <hante.meuleman@...adcom.com>,
Chi-Hsien Lin <chi-hsien.lin@...ress.com>,
Wright Feng <wright.feng@...ress.com>,
Kalle Valo <kvalo@...eaurora.org>,
"David S. Miller" <davem@...emloft.net>,
Rafał Miłecki <rafal@...ecki.pl>,
Stefan Wahren <stefan.wahren@...e.com>,
Chung-Hsien Hsu <stanley.hsu@...ress.com>,
linux-wireless@...r.kernel.org,
brcm80211-dev-list.pdl@...adcom.com,
brcm80211-dev-list@...ress.com, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v3] brcmfmac: fix missing checks for kmemdup
In case kmemdup fails, the fix sets conn_info->req_ie_len and
conn_info->resp_ie_len to zero to avoid buffer overflows.
Signed-off-by: Kangjie Lu <kjlu@....edu>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index e92f6351bd22..8ee8af4e7ec4 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -5464,6 +5464,8 @@ static s32 brcmf_get_assoc_ies(struct brcmf_cfg80211_info *cfg,
conn_info->req_ie =
kmemdup(cfg->extra_buf, conn_info->req_ie_len,
GFP_KERNEL);
+ if (!conn_info->req_ie)
+ conn_info->req_ie_len = 0;
} else {
conn_info->req_ie_len = 0;
conn_info->req_ie = NULL;
@@ -5480,6 +5482,8 @@ static s32 brcmf_get_assoc_ies(struct brcmf_cfg80211_info *cfg,
conn_info->resp_ie =
kmemdup(cfg->extra_buf, conn_info->resp_ie_len,
GFP_KERNEL);
+ if (!conn_info->resp_ie)
+ conn_info->resp_ie_len = 0;
} else {
conn_info->resp_ie_len = 0;
conn_info->resp_ie = NULL;
--
2.17.1
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