tree 4e8a15b4e577c93f78adf5413501868a7b5e9ce1
parent 0787162138d0095181f61ef8d183cf9929af17a3
author Dave Weinstein <olorin@google.com> 1469732141 -0700
committer chrmhoffmann <chrmhoffmann@gmail.com> 1502527090 +0200

arm: oabi compat: add missing access checks

commit 7de249964f5578e67b99699c5f0b405738d820a2 upstream.

Add access checks to sys_oabi_epoll_wait() and sys_oabi_semtimedop().
This fixes CVE-2016-3857, a local privilege escalation under
CONFIG_OABI_COMPAT.

Change-Id: I7b22aaa6e12d0a068db330cd5fb87012c6de2604
Cc: stable@vger.kernel.org
Reported-by: Chiachih Wu <wuchiachih@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Dave Weinstein <olorin@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>