From: Kees Cook <keescook@chromium.org>
Date: Fri, 10 May 2013 21:48:21 +0000 (-0700)
Subject: b43: stop format string leaking into error msgs
X-Git-Tag: v3.2.47~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bfb624e7fd41437a2c256adaf4041fe4414f8f26;p=pandora-kernel.git

b43: stop format string leaking into error msgs

commit e0e29b683d6784ef59bbc914eac85a04b650e63c upstream.

The module parameter "fwpostfix" is userspace controllable, unfiltered,
and is used to define the firmware filename. b43_do_request_fw() populates
ctx->errors[] on error, containing the firmware filename. b43err()
parses its arguments as a format string. For systems with b43 hardware,
this could lead to a uid-0 to ring-0 escalation.

CVE-2013-2852

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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