[PATCH 4.9 094/128] brcmfmac: fix missing checks for kmemdup

[Greg Kroah-Hartman]

[ Upstream commit 46953f97224d56a12ccbe9c6acaa84ca0dab2780 ]

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@xxxxxxx>
Acked-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 530f521209728..8f8fe6f2af5b0 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -5374,6 +5374,8 @@ 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;
@@ -5390,6 +5392,8 @@ 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;
-- 
2.20.1