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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>
This commit is contained in:
Jiri Slaby 2011-02-28 10:34:06 +01:00 committed by Greg Kroah-Hartman
parent f7d7aedfcd
commit 6960f40a95
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/serial/kobil_sct.c
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@ -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 */
/*