From: Alexander Beregalov <a.beregalov@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Alexander Beregalov <a.beregalov@gmail.com>,
Jeff Dike <jdike@addtoit.com>
Subject: [PATCH 4/4] uml: line.c: avoid NULL pointer dereference
Date: Thu, 7 Jan 2010 04:48:41 +0300 [thread overview]
Message-ID: <1262828921-29517-4-git-send-email-a.beregalov@gmail.com> (raw)
In-Reply-To: <1262828921-29517-3-git-send-email-a.beregalov@gmail.com>
Assign tty only if line is not NULL.
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
---
arch/um/drivers/line.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index cf8a97f..8ebdc8c 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -18,9 +18,10 @@ static irqreturn_t line_interrupt(int irq, void *data)
{
struct chan *chan = data;
struct line *line = chan->line;
- struct tty_struct *tty = line->tty;
+ struct tty_struct *tty;
if (line)
+ tty = line->tty;
chan_interrupt(&line->chan_list, &line->task, tty, irq);
return IRQ_HANDLED;
}
--
1.6.6
next prev parent reply other threads:[~2010-01-07 1:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-07 1:48 [PATCH 1/4] mtd: mxc_nand: " Alexander Beregalov
2010-01-07 1:48 ` [PATCH 2/4] SCSI: pm8001: " Alexander Beregalov
2010-01-07 1:48 ` [PATCH 3/4] ISDN: hysdn: " Alexander Beregalov
2010-01-07 1:48 ` Alexander Beregalov [this message]
2010-01-07 4:32 ` [PATCH 4/4] uml: line.c: " Jeff Dike
2010-01-07 15:56 ` Alexander Beregalov
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