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authorJohan Hovold <johan@kernel.org>2017-03-13 15:47:49 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-14 12:07:30 +0300
commit1dc56c52d2484be09c7398a5207d6b11a4256be9 (patch)
tree25c58e611964f67a971a199db3583dae75d3fb5e /drivers/usb/misc/lvstest.c
parentb0addd3fa6bcd119be9428996d5d4522479ab240 (diff)
downloadlinux-1dc56c52d2484be09c7398a5207d6b11a4256be9.tar.xz
USB: lvtest: fix NULL-deref at probe
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: stable <stable@vger.kernel.org> # 3.17 Cc: Pratyush Anand <pratyush.anand@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc/lvstest.c')
-rw-r--r--drivers/usb/misc/lvstest.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
index 77176511658f..d3d124753266 100644
--- a/drivers/usb/misc/lvstest.c
+++ b/drivers/usb/misc/lvstest.c
@@ -366,6 +366,10 @@ 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 */