tree c69016a3a6af668fb38e98f8fe11db8af55699f0
parent 2a0fb9478fdef50a5638bba4a6611222bd51fb6d
author Johan Hovold <johan@kernel.org> 1575977158 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1576921313 +0100

USB: atm: ueagle-atm: add missing endpoint check

commit 09068c1ad53fb077bdac288869dec2435420bdc4 upstream.

Make sure that the interrupt interface has an endpoint before trying to
access its endpoint descriptors to avoid dereferencing a NULL pointer.

The driver binds to the interrupt interface with interface number 0, but
must not assume that this interface or its current alternate setting are
the first entries in the corresponding configuration arrays.

Fixes: b72458a80c75 ("[PATCH] USB: Eagle and ADI 930 usb adsl modem driver")
Cc: stable <stable@vger.kernel.org>     # 2.6.16
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>