From de895b43932cb47e69480540be7eca289af24f23 Mon Sep 17 00:00:00 2001 From: Luiz Augusto von Dentz Date: Wed, 19 May 2021 13:41:51 -0700 Subject: [PATCH] Bluetooth: L2CAP: Fix invalid access on ECRED Connection response The use of l2cap_chan_del is not safe under a loop using list_for_each_entry. Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Marcel Holtmann --- net/bluetooth/l2cap_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index f3b70fa..9ebb85d 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -6066,7 +6066,7 @@ static inline int l2cap_ecred_conn_rsp(struct l2cap_conn *conn, struct l2cap_ecred_conn_rsp *rsp = (void *) data; struct hci_conn *hcon = conn->hcon; u16 mtu, mps, credits, result; - struct l2cap_chan *chan; + struct l2cap_chan *chan, *tmp; int err = 0, sec_level; int i = 0; @@ -6085,7 +6085,7 @@ static inline int l2cap_ecred_conn_rsp(struct l2cap_conn *conn, cmd_len -= sizeof(*rsp); - list_for_each_entry(chan, &conn->chan_l, list) { + list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { u16 dcid; if (chan->ident != cmd->ident || -- 2.7.4