| From 15e5bee33ffc11d0e5c6f819a65e7881c5c407be Mon Sep 17 00:00:00 2001 |
| From: Johan Hovold <jhovold@gmail.com> |
| Date: Tue, 22 Mar 2011 11:12:10 +0100 |
| Subject: USB: cdc-acm: fix potential null-pointer dereference |
| |
| From: Johan Hovold <jhovold@gmail.com> |
| |
| commit 15e5bee33ffc11d0e5c6f819a65e7881c5c407be upstream. |
| |
| Must check return value of tty_port_tty_get. |
| |
| Signed-off-by: Johan Hovold <jhovold@gmail.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| drivers/usb/class/cdc-acm.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/drivers/usb/class/cdc-acm.c |
| +++ b/drivers/usb/class/cdc-acm.c |
| @@ -534,6 +534,8 @@ static void acm_softint(struct work_stru |
| if (!ACM_READY(acm)) |
| return; |
| tty = tty_port_tty_get(&acm->port); |
| + if (!tty) |
| + return; |
| tty_wakeup(tty); |
| tty_kref_put(tty); |
| } |
