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Message-ID: <20160908223558.GA11742@www.outflux.net>
Date: Thu, 8 Sep 2016 15:35:59 -0700
From: Kees Cook <keescook@...omium.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jslaby@...e.com>, linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCH] pty: make ptmx file ops read-only after init
The ptmx_fops structure is only changed during init, so mark it as such.
Signed-off-by: Kees Cook <keescook@...omium.org>
---
drivers/tty/pty.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 51e0d32883ba..a23fa5ed1d67 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -800,7 +800,7 @@ out_free_file:
return retval;
}
-static struct file_operations ptmx_fops;
+static struct file_operations ptmx_fops __ro_after_init;
static void __init unix98_pty_init(void)
{
--
2.7.4
--
Kees Cook
Nexus Security
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