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[Bluetooth] Restrict well known PSM to privileged users

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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>
This commit is contained in:
Marcel Holtmann 2007-01-22 22:00:45 +01:00
parent 7386397636
commit 847641d7db
1 changed files with 6 additions and 0 deletions
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6
net/bluetooth/l2cap.c
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@ -585,6 +585,12 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_
goto done; 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); write_lock_bh(&l2cap_sk_list.lock);
if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) {