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| author | Gustavo A. R. Silva <garsilva@embeddedor.com> | 2017-11-17 14:02:09 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-19 12:23:57 +0900 |
| commit | 61c59355e0154a938b28710dfa6c1d8be2ddcefa (patch) | |
| tree | 965c9f92f32d6d69c92e60e1289f0274cbc1085b | |
| parent | 981542c526ecd846920bc500e9989da906ee9fb9 (diff) | |
| download | linux-stable-61c59355e0154a938b28710dfa6c1d8be2ddcefa.tar.gz linux-stable-61c59355e0154a938b28710dfa6c1d8be2ddcefa.tar.bz2 linux-stable-61c59355e0154a938b28710dfa6c1d8be2ddcefa.zip | |
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>
| -rw-r--r-- | drivers/net/usb/ipheth.c | 5 |
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 */ |