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authorGustavo A. R. Silva <garsilva@embeddedor.com>2017-11-17 14:02:09 -0600
committerDavid S. Miller <davem@davemloft.net>2017-11-19 12:23:57 +0900
commit61c59355e0154a938b28710dfa6c1d8be2ddcefa (patch)
tree965c9f92f32d6d69c92e60e1289f0274cbc1085b /drivers/net/usb
parent981542c526ecd846920bc500e9989da906ee9fb9 (diff)
downloadlinux-61c59355e0154a938b28710dfa6c1d8be2ddcefa.tar.bz2
usbnet: ipheth: fix potential null pointer dereference in ipheth_carrier_set
_dev_ is being dereferenced before it is null checked, hence there is a potential null pointer dereference. Fix this by moving the pointer dereference after _dev_ has been null checked. Addresses-Coverity-ID: 1462020 Fixes: bb1b40c7cb86 ("usbnet: ipheth: prevent TX queue timeouts when device not ready") Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb')
-rw-r--r--drivers/net/usb/ipheth.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c
index ca71f6c03859..7275761a1177 100644
--- a/drivers/net/usb/ipheth.c
+++ b/drivers/net/usb/ipheth.c
@@ -291,12 +291,15 @@ static void ipheth_sndbulk_callback(struct urb *urb)
static int ipheth_carrier_set(struct ipheth_device *dev)
{
- struct usb_device *udev = dev->udev;
+ struct usb_device *udev;
int retval;
+
if (!dev)
return 0;
if (!dev->confirmed_pairing)
return 0;
+
+ udev = dev->udev;
retval = usb_control_msg(udev,
usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP),
IPHETH_CMD_CARRIER_CHECK, /* request */