From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: greg@kroah.com, linux-kernel@vger.kernel.org
Subject: [PATCH RESEND #2 3/3] tty: handle NULL parameters in free_tty_struct()
Date: Wed, 08 Aug 2012 16:29:43 +0100 [thread overview]
Message-ID: <20120808152929.8280.68104.stgit@localhost.localdomain> (raw)
In-Reply-To: <20120808152735.8280.54767.stgit@localhost.localdomain>
From: Dan Carpenter <dan.carpenter@oracle.com>
We sometimes pass NULL pointers to free_tty_struct(). One example where
it can happen is in the error handling code in pty_common_install().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/tty/tty_io.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 6087499..6784aae 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -181,6 +181,8 @@ struct tty_struct *alloc_tty_struct(void)
void free_tty_struct(struct tty_struct *tty)
{
+ if (!tty)
+ return;
if (tty->dev)
put_device(tty->dev);
kfree(tty->write_buf);
prev parent reply other threads:[~2012-08-08 15:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-08 15:27 [PATCH RESEND #2 1/3] serqt_usb2: drag screaming into the 21st century Alan Cox
2012-08-08 15:23 ` Greg KH
2012-08-08 15:29 ` [PATCH RESEND #2 2/3] tty: fix missing assignment Alan Cox
2012-08-08 15:29 ` Alan Cox [this message]
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