Staging: rtl8192u: Check kmalloc return value before use the buffer in ieee80211_soft...

Check kmalloc return value before use the buffer.

Signed-off-by: Zhitong Wang <zhitong.wangzt@alibaba-inc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
index 148424a..e5e583e 100644 (file)
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
@@ -1580,6 +1580,8 @@ static inline u16 auth_parse(struct sk_buff *skb, u8** challenge, int *chlen)
                if(*(t++) == MFIE_TYPE_CHALLENGE){
                        *chlen = *(t++);
                        *challenge = (u8*)kmalloc(*chlen, GFP_ATOMIC);
+                       if (!*challenge)
+                               return -ENOMEM;
                        memcpy(*challenge, t, *chlen);
                }
        }