We cannot call module_put(THIS_MODULE) if this is our last reference. Otherwise,
this call may cleanup our module before it returns.
Gladly, the kthread API provides a simple wrapper for us. So lets use
module_put_and_exit() to avoid a race condition with the module cleanup code.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
---
net/bluetooth/cmtp/core.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
index 9e8940b..6c9c1fd 100644
--- a/net/bluetooth/cmtp/core.c
+++ b/net/bluetooth/cmtp/core.c
@@ -65,14 +65,12 @@ static struct cmtp_session *__cmtp_get_session(bdaddr_t *bdaddr)
static void __cmtp_link_session(struct cmtp_session *session)
{
- __module_get(THIS_MODULE);
list_add(&session->list, &cmtp_session_list);
}
static void __cmtp_unlink_session(struct cmtp_session *session)
{
list_del(&session->list);
- module_put(THIS_MODULE);
}
static void __cmtp_copy_session(struct cmtp_session *session, struct cmtp_conninfo *ci)
@@ -325,6 +323,7 @@ static int cmtp_session(void *arg)
up_write(&cmtp_session_sem);
kfree(session);
+ module_put_and_exit(0);
return 0;
}
@@ -374,9 +373,11 @@ int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock)
__cmtp_link_session(session);
+ __module_get(THIS_MODULE);
session->task = kthread_run(cmtp_session, session, "kcmtpd_ctr_%d",
session->num);
if (IS_ERR(session->task)) {
+ module_put(THIS_MODULE);
err = PTR_ERR(session->task);
goto unlink;
}
--
1.7.7.3
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
