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| author | Johan Hovold <johan@kernel.org> | 2017-03-13 13:47:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-18 07:55:53 +0200 |
| commit | 017421d23fdd95295f71ae2c5ea6f249d86330fe (patch) | |
| tree | 932b3c4418a493d35746f4ae9ff3a963fb8dfd07 | |
| parent | 5994fcb7d079e9fb20b35bde54ce8e3e9fa7209d (diff) | |
| download | linux-rt-017421d23fdd95295f71ae2c5ea6f249d86330fe.tar.gz | |
USB: lvtest: fix NULL-deref at probe
commit 1dc56c52d2484be09c7398a5207d6b11a4256be9 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should the probed device lack endpoints.
Note that this driver does not bind to any devices by default.
Fixes: ce21bfe603b3 ("USB: Add LVS Test device driver")
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/misc/lvstest.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c index 62cb8cd08403..66e2d036bb37 100644 --- a/drivers/usb/misc/lvstest.c +++ b/drivers/usb/misc/lvstest.c @@ -370,6 +370,10 @@ static int lvs_rh_probe(struct usb_interface *intf, hdev = interface_to_usbdev(intf); desc = intf->cur_altsetting; + + if (desc->desc.bNumEndpoints < 1) + return -ENODEV; + endpoint = &desc->endpoint[0].desc; /* valid only for SS root hub */ |