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staging: vt6656: Don't leak memory in drivers/staging/vt6656/ioctl.c::private_ioctl() 

If copy_to_user() fails in the WLAN_CMD_GET_NODE_LIST case of the
switch in drivers/staging/vt6656/ioctl.c::private_ioctl() we'll leak
the memory allocated to 'pNodeList'. Fix that by kfree'ing the memory
in the failure case.
Also remove a pointless cast (to type 'PSNodeList') of a kmalloc()
return value - kmalloc() returns a void pointer that is implicitly
converted, so there is no need for an explicit cast.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Jesper Juhl 2012-04-12 00:35:46 +02:00 committed by Greg Kroah-Hartman
parent 62d2feb980
commit 17b7e1ba1e
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/vt6656/ioctl.c
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@ -565,7 +565,7 @@ int private_ioctl(PSDevice pDevice, struct ifreq *rq)
result = -ENOMEM;
break;
}
pNodeList = (PSNodeList)kmalloc(sizeof(SNodeList) + (sNodeList.uItem * sizeof(SNodeItem)), (int)GFP_ATOMIC);
pNodeList = kmalloc(sizeof(SNodeList) + (sNodeList.uItem * sizeof(SNodeItem)), (int)GFP_ATOMIC);
if (pNodeList == NULL) {
result = -ENOMEM;
break;
@ -601,6 +601,7 @@ int private_ioctl(PSDevice pDevice, struct ifreq *rq)
}
}
if (copy_to_user(pReq->data, pNodeList, sizeof(SNodeList) + (sNodeList.uItem * sizeof(SNodeItem)))) {
kfree(pNodeList);
result = -EFAULT;
break;
}