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authorJiri Slaby <jslaby@suse.cz>2011-02-28 12:34:06 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-01 06:24:54 +0300
commit6960f40a954619857e7095a6179eef896f297077 (patch)
tree57d7c5e0177399c5aa92bec9b1510dfcc6b2d684 /drivers/usb/serial/kobil_sct.c
parentf7d7aedfcd4e20e7dfc7356d30cc22dc0b0f493e (diff)
downloadlinux-6960f40a954619857e7095a6179eef896f297077.tar.xz
USB: serial/kobil_sct, fix potential tty NULL dereference
Make sure that we check the return value of tty_port_tty_get. Sometimes it may return NULL and we later dereference that. The only place here is in kobil_read_int_callback, so fix it. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@linux.intel.com> Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/kobil_sct.c')
-rw-r--r--drivers/usb/serial/kobil_sct.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index bd5bd8589e04..b382d9a0274d 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -372,7 +372,7 @@ static void kobil_read_int_callback(struct urb *urb)
}
tty = tty_port_tty_get(&port->port);
- if (urb->actual_length) {
+ if (tty && urb->actual_length) {
/* BEGIN DEBUG */
/*