From 17b7e1ba1e2ecc9a09f5e154e555accd2a2eaedf Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Thu, 12 Apr 2012 00:35:46 +0200 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/vt6656/ioctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/vt6656/ioctl.c b/drivers/staging/vt6656/ioctl.c index 1463d76895f..d59456c29df 100644 --- a/drivers/staging/vt6656/ioctl.c +++ b/drivers/staging/vt6656/ioctl.c @@ -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; } -- 2.20.1