commit: 15e5bee33ffc11d0e5c6f819a65e7881c5c407be From: Johan Hovold <[email protected]> Date: Tue, 22 Mar 2011 11:12:10 +0100 Subject: [PATCH] USB: cdc-acm: fix potential null-pointer dereference
Must check return value of tty_port_tty_get. Cc: stable <[email protected]> Signed-off-by: Johan Hovold <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/class/cdc-acm.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 00d809d..1756371 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -533,6 +533,8 @@ static void acm_softint(struct work_struct *work) if (!ACM_READY(acm)) return; tty = tty_port_tty_get(&acm->port); + if (!tty) + return; tty_wakeup(tty); tty_kref_put(tty); } _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
