Commit e3fb592b authored by Vasiliy Kulikov's avatar Vasiliy Kulikov Committed by Gustavo F. Padovan

Bluetooth: l2cap: fix 1 byte infoleak to userspace

Structure l2cap_options has one padding byte between max_tx and
txwin_size fields.  This byte in "opts" is copied to userspace
uninitialized.
Signed-off-by: default avatarVasiliy Kulikov <segoon@openwall.com>
Signed-off-by: default avatarGustavo F. Padovan <padovan@profusion.mobi>
parent 6d1d4ea4
...@@ -392,6 +392,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us ...@@ -392,6 +392,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us
switch (optname) { switch (optname) {
case L2CAP_OPTIONS: case L2CAP_OPTIONS:
memset(&opts, 0, sizeof(opts));
opts.imtu = l2cap_pi(sk)->imtu; opts.imtu = l2cap_pi(sk)->imtu;
opts.omtu = l2cap_pi(sk)->omtu; opts.omtu = l2cap_pi(sk)->omtu;
opts.flush_to = l2cap_pi(sk)->flush_to; opts.flush_to = l2cap_pi(sk)->flush_to;
......
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