[PATCH 1/1] staging: wilc1000: fix unchecked return value

From	Pan Bian <bianpan201602@163.com>
Newsgroups	linux.kernel
Subject	[PATCH 1/1] staging: wilc1000: fix unchecked return value
Date	2017-04-23 14:00 +0200
Message-ID	<tzolk-7Zf-13@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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From: Pan Bian <bianpan2016@163.com>

Function dev_alloc_skb() will return a NULL pointer if there is no
enough memory. However, in function WILC_WFI_mon_xmit(), its return
value is used without validation. This may result in a bad memory access
bug. This patch fixes the bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
---
 drivers/staging/wilc1000/linux_mon.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/wilc1000/linux_mon.c b/drivers/staging/wilc1000/linux_mon.c
index f328d75..c9782d4 100644
--- a/drivers/staging/wilc1000/linux_mon.c
+++ b/drivers/staging/wilc1000/linux_mon.c
@@ -197,6 +197,8 @@ static netdev_tx_t WILC_WFI_mon_xmit(struct sk_buff *skb,
 
 	if (skb->data[0] == 0xc0 && (!(memcmp(broadcast, &skb->data[4], 6)))) {
 		skb2 = dev_alloc_skb(skb->len + sizeof(struct wilc_wfi_radiotap_cb_hdr));
+		if (!skb2)
+			return -ENOMEM;
 
 		memcpy(skb_put(skb2, skb->len), skb->data, skb->len);
 
-- 
1.9.1

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[PATCH 1/1] staging: wilc1000: fix unchecked return value Pan Bian <bianpan201602@163.com> - 2017-04-23 14:00 +0200

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