From 03315b59165ee2049a4b903a1b0b8bf673d701fa Mon Sep 17 00:00:00 2001 From: Alexander Beregalov Date: Fri, 5 Mar 2010 13:42:33 -0800 Subject: [PATCH] uml: line.c: avoid NULL pointer dereference Assign tty only if line is not NULL. [akpm@linux-foundation.org: simplification] Signed-off-by: Alexander Beregalov Cc: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/drivers/line.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index cf8a97f34518..64cda95f59ca 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -18,10 +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) - chan_interrupt(&line->chan_list, &line->task, tty, irq); + chan_interrupt(&line->chan_list, &line->task, line->tty, irq); return IRQ_HANDLED; } -- 2.39.2