A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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dfc: fix null pointer access

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Fix a null pointer dereference issue when data packets trigger the
queuing of powersave work before the powersave workqueue is initialized.

Change-Id: Ia3515a7aaa47cb41568c39462bca73ceae11ea9c
Acked-by: Weiyi Chen <weiyic@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
This commit is contained in:
Subash Abhinov Kasiviswanathan 2020-06-24 10:49:26 -07:00
commit aeca58ead5
1 changed files with 4 additions and 1 deletions
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5
core/qmi_rmnet.c
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@ -919,6 +919,7 @@ EXPORT_SYMBOL(qmi_rmnet_qos_exit_post);
static struct workqueue_struct *rmnet_ps_wq;
static struct rmnet_powersave_work *rmnet_work;
static bool rmnet_work_quit;
static bool rmnet_work_inited;
static LIST_HEAD(ps_list);
struct rmnet_powersave_work {
@ -1148,6 +1149,7 @@ void qmi_rmnet_work_init(void *port)
rmnet_work_quit = false;
qmi_rmnet_work_set_active(rmnet_work->port, 1);
queue_delayed_work(rmnet_ps_wq, &rmnet_work->work, PS_INTERVAL);
rmnet_work_inited = true;
}
EXPORT_SYMBOL(qmi_rmnet_work_init);
@ -1156,7 +1158,7 @@ void qmi_rmnet_work_maybe_restart(void *port)
struct qmi_info *qmi;
qmi = (struct qmi_info *)rmnet_get_qmi_pt(port);
if (unlikely(!qmi))
if (unlikely(!qmi || !rmnet_work_inited))
return;
if (!test_and_set_bit(PS_WORK_ACTIVE_BIT, &qmi->ps_work_active))
@ -1172,6 +1174,7 @@ void qmi_rmnet_work_exit(void *port)
rmnet_work_quit = true;
synchronize_rcu();
rmnet_work_inited = false;
alarm_cancel(&rmnet_work->atimer);
cancel_delayed_work_sync(&rmnet_work->work);
destroy_workqueue(rmnet_ps_wq);