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authorJohan Hovold <jhovold@gmail.com>2011-03-22 10:12:10 (GMT)
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-23 20:21:59 (GMT)
commit15e5bee33ffc11d0e5c6f819a65e7881c5c407be (patch)
tree364c0fa67bc8684ee7d329762ef870738ec0f91a /drivers/usb/class/cdc-acm.c
parent23b80550e2aa61d0ba3af98b831b9195be0db9ee (diff)
downloadlinux-fsl-qoriq-15e5bee33ffc11d0e5c6f819a65e7881c5c407be.tar.xz
USB: cdc-acm: fix potential null-pointer dereference
Must check return value of tty_port_tty_get. Cc: stable <stable@kernel.org> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c2
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);
}