Patch "staging: wilc1000: fix unchecked return value" has been added to the 4.4-stable tree

Patch "staging: wilc1000: fix unchecked return value" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    staging: wilc1000: fix unchecked return value

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     staging-wilc1000-fix-unchecked-return-value.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Mar 22 14:57:32 CET 2018
From: Pan Bian <bianpan2016@163.com>
Date: Sun, 23 Apr 2017 19:53:58 +0800
Subject: staging: wilc1000: fix unchecked return value

From: Pan Bian <bianpan2016@163.com>


[ Upstream commit 9e96652756ad647b7bcc03cb99ffc9756d7b5f93 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/wilc1000/linux_mon.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/staging/wilc1000/linux_mon.c
+++ b/drivers/staging/wilc1000/linux_mon.c
@@ -251,6 +251,8 @@ static netdev_tx_t WILC_WFI_mon_xmit(str
 
 	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);
 


Patches currently in stable-queue which might be from bianpan2016@163.com are

queue-4.4/mt7601u-check-return-value-of-alloc_skb.patch
queue-4.4/rndis_wlan-add-return-value-validation.patch
queue-4.4/staging-wilc1000-fix-unchecked-return-value.patch
queue-4.4/qlcnic-fix-unchecked-return-value.patch
queue-4.4/wan-pc300too-abort-path-on-failure.patch