arm: oabi compat: add missing access checks

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commit 7de249964f 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.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dave Weinstein 2016-07-28 11:55:41 -07:00 • committed by Greg Kroah-Hartman

parent 66e5d7b47c

commit 0107ea0e09

1 changed files with 7 additions and 1 deletions

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arch/arm/kernel/sys_oabi-compat.c

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