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USB: serial/kobil_sct, fix potential tty NULL dereference
author
Jiri Slaby
<jslaby@suse.cz>
Mon, 28 Feb 2011 09:34:06 +0000
(10:34 +0100)
committer
Greg Kroah-Hartman
<gregkh@suse.de>
Tue, 1 Mar 2011 03:24:54 +0000
(19:24 -0800)
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>
drivers/usb/serial/kobil_sct.c
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diff --git
a/drivers/usb/serial/kobil_sct.c
b/drivers/usb/serial/kobil_sct.c
index bd5bd8589e04cc300f43674079afa3f54715ee35..b382d9a0274d553545dc2e5cb3ed53d7e67ceb54 100644
(file)
--- 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 */
/*
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