isdn: gigaset: use after free
I moved the kfree(cb) below the dereferences.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index 0ded364..707d9c9 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -1914,11 +1914,13 @@
* The next command will reopen the AT channel automatically.
*/
if (cb->len == 3 && !memcmp(cb->buf, "+++", 3)) {
- kfree(cb);
rc = req_submit(cs->bcs, HD_CLOSE_ATCHANNEL, 0, BAS_TIMEOUT);
if (cb->wake_tasklet)
tasklet_schedule(cb->wake_tasklet);
- return rc < 0 ? rc : cb->len;
+ if (!rc)
+ rc = cb->len;
+ kfree(cb);
+ return rc;
}
spin_lock_irqsave(&cs->cmdlock, flags);