From: Benjamin Tissoires Date: Wed, 11 Sep 2013 19:56:58 +0000 (+0200) Subject: HID: multitouch: validate indexes details X-Git-Tag: v3.12-rc2~25^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8821f5dc187bdf16cfb32ef5aa8c3035273fa79a;p=pandora-kernel.git HID: multitouch: validate indexes details When working on report indexes, always validate that they are in bounds. Without this, a HID device could report a malicious feature report that could trick the driver into a heap overflow: [ 634.885003] usb 1-1: New USB device found, idVendor=0596, idProduct=0500 ... [ 676.469629] BUG kmalloc-192 (Tainted: G W ): Redzone overwritten Note that we need to change the indexes from s8 to s16 as they can be between -1 and 255. CVE-2013-2897 Cc: stable@vger.kernel.org Signed-off-by: Benjamin Tissoires Acked-by: Kees Cook Signed-off-by: Jiri Kosina --- Reading git-diff-tree failed