From: Johan Hovold <johan@kernel.org>
Date: Tue, 31 Jan 2017 16:17:27 +0000 (+0100)
Subject: USB: serial: digi_acceleport: fix OOB data sanity check
X-Git-Tag: v3.2.89~71
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=90f4c688d372b04cf401906098fc03db0a567814;p=pandora-kernel.git

USB: serial: digi_acceleport: fix OOB data sanity check

commit 2d380889215fe20b8523345649dee0579821800c upstream.

Make sure to check for short transfers to avoid underflow in a loop
condition when parsing the receive buffer.

Also fix an off-by-one error in the incomplete sanity check which could
lead to invalid data being parsed.

Fixes: 8c209e6782ca ("USB: make actual_length in struct urb field u32")
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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