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authorMarcel Holtmann2007-01-22 22:00:45 +0100
committerMarcel Holtmann2007-01-22 22:00:45 +0100
commit847641d7db15ac3f18b3d4aa05479812abdf397a (patch)
tree59c7f5f3fc3b6a06912487222cd1dbb4214825c4
parent7386397636d49cd5f03da29432467d3e98cbad35 (diff)
[Bluetooth] Restrict well known PSM to privileged users
The PSM values below 0x1001 of L2CAP are reserved for well known services. Restrict the possibility to bind them to privileged users. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
-rw-r--r--net/bluetooth/l2cap.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index be5a6e60a3c4..f8c25d500155 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -585,6 +585,12 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_
goto done;
}
+ if (la->l2_psm > 0 && btohs(la->l2_psm) < 0x1001 &&
+ !capable(CAP_NET_BIND_SERVICE)) {
+ err = -EACCES;
+ goto done;
+ }
+
write_lock_bh(&l2cap_sk_list.lock);
if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) {