From 5fef87cbbf422e0f6792ac9c8536fd6aa795f1f4 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Fri, 22 Sep 2017 21:35:53 +0200 Subject: [PATCH] staging: rtl8192u: Check some memory allocation failure If one of these memory allocations fail, a NULL pointer dereference will occur later on. Return -ENOMEM instead. There is no need to free the resources already allocated, this is done by the caller (i.e. 'rtl8192_usb_probe()') which calls 'rtl8192_usb_deleteendpoints()'. The calling graph is: rtl8192_usb_probe --> rtl8192_init --> rtl8192_usb_initendpoints Signed-off-by: Christophe JAILLET Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8192u/r8192U_core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c index 46b3f19e0878..48b7fd071900 100644 --- a/drivers/staging/rtl8192u/r8192U_core.c +++ b/drivers/staging/rtl8192u/r8192U_core.c @@ -1687,9 +1687,13 @@ static short rtl8192_usb_initendpoints(struct net_device *dev) #ifndef JACKSON_NEW_RX for (i = 0; i < (MAX_RX_URB + 1); i++) { priv->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!priv->rx_urb[i]) + return -ENOMEM; priv->rx_urb[i]->transfer_buffer = kmalloc(RX_URB_SIZE, GFP_KERNEL); + if (!priv->rx_urb[i]->transfer_buffer) + return -ENOMEM; priv->rx_urb[i]->transfer_buffer_length = RX_URB_SIZE; }