Modifying the flags of an IP addr object needs to be protected against
eg. concurrent removal of the same object from the IP table.
Fixes: 5f78e29ceebf ("qeth: optimize IP handling in rx_mode callback")
Signed-off-by: Julian Wiedmann <jwi@xxxxxxxxxxxxxxxxxx>
---
drivers/s390/net/qeth_l3_sys.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/s390/net/qeth_l3_sys.c b/drivers/s390/net/qeth_l3_sys.c
index e256928092e5..aa676b4090da 100644
--- a/drivers/s390/net/qeth_l3_sys.c
+++ b/drivers/s390/net/qeth_l3_sys.c
@@ -395,6 +395,7 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
goto out;
card->ipato.enabled = enable;
+ spin_lock_bh(&card->ip_lock);
hash_for_each(card->ip_htable, i, addr, hnode) {
if (addr->type != QETH_IP_TYPE_NORMAL)
continue;
@@ -403,6 +404,7 @@ static ssize_t qeth_l3_dev_ipato_enable_store(struct device *dev,
else if (qeth_l3_is_addr_covered_by_ipato(card, addr))
addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
}
+ spin_unlock_bh(&card->ip_lock);
out:
mutex_unlock(&card->conf_mutex);
return rc ? rc : count;
--
2.13.5
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