From: Kees Cook <keescook@chromium.org>
Date: Tue, 17 Feb 2015 21:48:00 +0000 (-0800)
Subject: seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~62^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=580c57f1076872ebc2427f898b927944ce170f2d;p=pandora-kernel.git

seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO

The value resulting from the SECCOMP_RET_DATA mask could exceed MAX_ERRNO
when setting errno during a SECCOMP_RET_ERRNO filter action.  This makes
sure we have a reliable value being set, so that an invalid errno will not
be ignored by userspace.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Dmitry V. Levin <ldv@altlinux.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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