[Linux-kernel-mentees] [PATCH] net: bluetooth: hci_core: Use list_for_each_entry_rcu() to traverse RCU list in RCU read-side CS

madhuparnabhowmik10 at gmail.com madhuparnabhowmik10 at gmail.com
Tue Feb 25 13:17:53 UTC 2020


From: Madhuparna Bhowmik <madhuparnabhowmik10 at gmail.com>

In function hci_is_blocked_key() RCU list is traversed with
list_for_each_entry() in RCU read-side CS.
Use list_for_each_entry_rcu() instead.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10 at gmail.com>
---
 net/bluetooth/hci_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 8ddd1bea02be..4e6d61a95b20 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2327,7 +2327,7 @@ bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
 	struct blocked_key *b;
 
 	rcu_read_lock();
-	list_for_each_entry(b, &hdev->blocked_keys, list) {
+	list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
 		if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
 			blocked = true;
 			break;
-- 
2.17.1



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