linux-kernel - [PATCH] Bluetooth: 6lowpan: Fix disconnect bug in 6lowpan

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1516160848-471-1-git-send-email-yi2010.guo@samsung.com>
Date:   Wed, 17 Jan 2018 11:47:28 +0800
From:   Guo Yi <yi2010.guo@...sung.com>
To:     linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     marcel@...tmann.org, gustavo@...ovan.org, johan.hedberg@...il.com,
        davem@...emloft.net, Guo Yi <yi2010.guo@...sung.com>
Subject: [PATCH] Bluetooth: 6lowpan: Fix disconnect bug in 6lowpan

This patch fix the bluetooth 6lowpan disconnect fail bug.

The type of the same address type have different define value in HCI layer
and L2CAP layer.That makes disconnect fail due to wrong network type.User
will not be able to disconnect from console with the network type that used
in connect.

This patch add a var lookup_type, and covert the channel address type to
HCI address type. By these means, user can disconnect successfuly.

Signed-off-by: Guo Yi <yi2010.guo@...sung.com>
---
 net/bluetooth/6lowpan.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 795ddd8..332dddb 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -1104,11 +1104,18 @@ static int get_l2cap_conn(char *buf, bdaddr_t *addr, u8 *addr_type,
 	struct hci_dev *hdev;
 	bdaddr_t *src = BDADDR_ANY;
 	int n;
+	u8 lookup_type;
 
 	n = sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
 		   &addr->b[5], &addr->b[4], &addr->b[3],
 		   &addr->b[2], &addr->b[1], &addr->b[0],
 		   addr_type);
+	/* Convert from L2CAP channel address type to HCI address type
+	 */
+	if (*addr_type == BDADDR_LE_PUBLIC)
+		lookup_type = ADDR_LE_DEV_PUBLIC;
+	else
+		lookup_type = ADDR_LE_DEV_RANDOM;
 
 	if (n < 7)
 		return -EINVAL;
@@ -1118,7 +1125,7 @@ static int get_l2cap_conn(char *buf, bdaddr_t *addr, u8 *addr_type,
 		return -ENOENT;
 
 	hci_dev_lock(hdev);
-	hcon = hci_conn_hash_lookup_le(hdev, addr, *addr_type);
+	hcon = hci_conn_hash_lookup_le(hdev, addr, lookup_type);
 	hci_dev_unlock(hdev);
 
 	if (!hcon)
-- 
2.7.4