From: Kees Cook <keescook@chromium.org>
Date: Wed, 11 Sep 2013 19:56:54 +0000 (+0200)
Subject: HID: LG: validate HID output report details
X-Git-Tag: v3.2.52~81
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3da8b771809032cf829869cabbffbed96cd47bc4;p=pandora-kernel.git

HID: LG: validate HID output report details

commit 0fb6bd06e06792469acc15bbe427361b56ada528 upstream.

A HID device could send a malicious output report that would cause the
lg, lg3, and lg4 HID drivers to write beyond the output report allocation
during an event, causing a heap overflow:

[  325.245240] usb 1-1: New USB device found, idVendor=046d, idProduct=c287
...
[  414.518960] BUG kmalloc-4096 (Not tainted): Redzone overwritten

Additionally, while lg2 did correctly validate the report details, it was
cleaned up and shortened.

CVE-2013-2893

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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