diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-14 19:55:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-17 07:22:58 +0300 |
| commit | 2e47c53503eb9faff42b3cfa144a833344dd1f89 (patch) | |
| tree | 5f5ee146e1e527a37817d5b22a168c4ef7e4bc92 /drivers/usb/class/usbtmc.c | |
| parent | 687e0687f71ec00e0132a21fef802dee88c2f1ad (diff) | |
| download | linux-2e47c53503eb9faff42b3cfa144a833344dd1f89.tar.xz | |
USB: usbtmc: fix probe error path
Make sure to initialise the return value to avoid having allocation
failures going unnoticed when allocating interrupt-endpoint resources.
This prevents use-after-free or worse when the device is later unbound.
Fixes: dbf3e7f654c0 ("Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation.")
Cc: stable <stable@vger.kernel.org> # 4.6
Cc: Dave Penkler <dpenkler@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/usbtmc.c')
| -rw-r--r-- | drivers/usb/class/usbtmc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c index 5e3446db4513..8fb309a0ff6b 100644 --- a/drivers/usb/class/usbtmc.c +++ b/drivers/usb/class/usbtmc.c @@ -1476,8 +1476,10 @@ static int usbtmc_probe(struct usb_interface *intf, if (data->iin_ep_present) { /* allocate int urb */ data->iin_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!data->iin_urb) + if (!data->iin_urb) { + retcode = -ENOMEM; goto error_register; + } /* Protect interrupt in endpoint data until iin_urb is freed */ kref_get(&data->kref); @@ -1485,8 +1487,10 @@ static int usbtmc_probe(struct usb_interface *intf, /* allocate buffer for interrupt in */ data->iin_buffer = kmalloc(data->iin_wMaxPacketSize, GFP_KERNEL); - if (!data->iin_buffer) + if (!data->iin_buffer) { + retcode = -ENOMEM; goto error_register; + } /* fill interrupt urb */ usb_fill_int_urb(data->iin_urb, data->usb_dev, |