From: Heiko Carstens <hca@linux.ibm.com>
To: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>,
Kees Cook <keescook@chromium.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-s390@vger.kernel.org
Subject: Re: [PATCH] s390/entry: add support for syscall stack randomization
Date: Fri, 30 Apr 2021 17:42:58 +0200 [thread overview]
Message-ID: <YIwlgusydxiQRyPl@osiris.fritz.box> (raw)
In-Reply-To: <20210429091451.1062594-1-svens@linux.ibm.com>
On Thu, Apr 29, 2021 at 11:14:51AM +0200, Sven Schnelle wrote:
> This adds support for adding a random offset to the stack while handling
> syscalls. The patch uses get_tod_clock_fast() as this is considered good
> enough and has much less performance penalty compared to using
> get_random_int(). The patch also adds randomization in pgm_check_handler()
> as the sigreturn/rt_sigreturn system calls might be called from there.
>
> Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
> ---
> arch/s390/Kconfig | 1 +
> arch/s390/include/asm/entry-common.h | 10 ++++++++++
> arch/s390/kernel/syscall.c | 1 +
> arch/s390/kernel/traps.c | 2 ++
> 4 files changed, 14 insertions(+)
Applied, thanks!
next prev parent reply other threads:[~2021-04-30 15:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-29 9:14 [PATCH] s390/entry: add support for syscall stack randomization Sven Schnelle
2021-04-30 15:42 ` Heiko Carstens [this message]
2021-04-30 17:10 ` Kees Cook
2021-05-03 6:36 ` Sven Schnelle
2021-05-03 9:13 ` Sven Schnelle
2021-05-03 18:31 ` Kees Cook
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