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staging: rtl8192u: return -ENOMEM on failed allocation of priv->oldaddr

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[ Upstream commit e1a7418529e33bc4efc346324557251a16a3e79b ]

Currently the allocation of priv->oldaddr is not null checked which will
lead to subsequent errors when accessing priv->oldaddr.  Fix this with
a null pointer check and a return of -ENOMEM on allocation failure.

Detected with Coccinelle:
drivers/staging/rtl8192u/r8192U_core.c:1708:2-15: alloc with no test,
possible model on line 1723

Fixes: 8fc8598e61f6 ("Staging: Added Realtek rtl8192u driver to staging")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2018-02-28 11:28:49 +00:00 committed by Greg Kroah-Hartman
parent 20b9506df1
commit d5ae597ed1
1 changed files with 2 additions and 0 deletions
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2
drivers/staging/rtl8192u/r8192U_core.c
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@ -1702,6 +1702,8 @@ static short rtl8192_usb_initendpoints(struct net_device *dev)
priv->rx_urb[16] = usb_alloc_urb(0, GFP_KERNEL); priv->rx_urb[16] = usb_alloc_urb(0, GFP_KERNEL);
priv->oldaddr = kmalloc(16, GFP_KERNEL); priv->oldaddr = kmalloc(16, GFP_KERNEL);
if (!priv->oldaddr)
return -ENOMEM;
oldaddr = priv->oldaddr; oldaddr = priv->oldaddr;
align = ((long)oldaddr) & 3; align = ((long)oldaddr) & 3;
if (align) { if (align) {