prima: Acquire read lock before accessing the address list
qcacld2.0 to prima propagation
WLAN host driver access the inet6_dev address list without acquiring
the read lock, if the kernel network stack deletes the address while
driver is accessing the list, it can lead to referencing already
freed address by the driver.
Hence, fix is to take the read lock before accessing the address list.
Change-Id: I934e9f2039f3ab8540e439b9e8a87efced98807c
CRs-Fixed: 1048897
diff --git a/CORE/HDD/src/wlan_hdd_early_suspend.c b/CORE/HDD/src/wlan_hdd_early_suspend.c
index a6a9e89..202a559 100644
--- a/CORE/HDD/src/wlan_hdd_early_suspend.c
+++ b/CORE/HDD/src/wlan_hdd_early_suspend.c
@@ -816,6 +816,7 @@
in6_dev = __in6_dev_get(pAdapter->dev);
if (NULL != in6_dev)
{
+ read_lock_bh(&in6_dev->lock);
list_for_each(p, &in6_dev->addr_list)
{
if (i >= slot_index)
@@ -856,6 +857,7 @@
i++;
}
}
+ read_unlock_bh(&in6_dev->lock);
vos_mem_zero(&offLoadRequest, sizeof(offLoadRequest));
for (i =0; i < slot_index; i++)