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

net/bluetooth/l2cap_sock.c

+1 −0
Original line number Diff line number Diff line
@@ -392,6 +392,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us 


	switch (optname) {

	case L2CAP_OPTIONS:

		memset(&opts, 0, sizeof(opts));

		opts.imtu     = l2cap_pi(sk)->imtu;

		opts.omtu     = l2cap_pi(sk)->omtu;

		opts.flush_to = l2cap_pi(sk)->flush_to;