linux-kernel - [PATCH] net, TTY: initialize tty->driver

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Date:	Thu,  4 Oct 2012 20:01:21 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	samuel@...tiz.org, davem@...emloft.net, gregkh@...uxfoundation.org,
	jslaby@...e.cz, alan@...ux.intel.com
Cc:	levinsasha928@...il.com, davej@...hat.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Sasha Levin <sasha.levin@...cle.com>
Subject: [PATCH] net, TTY: initialize tty->driver_data before usage

Commit 9c650ffc ("TTY: ircomm_tty, add tty install") split _open() to
_install() and _open(). It also moved the initialization of driver_data
out of open(), but never added it to install() - causing a NULL ptr
deref whenever the driver was used.

Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
---
 net/irda/ircomm/ircomm_tty.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 95a3a7a..496ce2c 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -421,6 +421,8 @@ static int ircomm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 		hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL);
 	}
 
+	tty->driver_data = self;
+
 	return tty_port_install(&self->port, driver, tty);
 }
 
-- 
1.7.12

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