3.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: Mathias Krause <mini...@googlemail.com> [ Upstream commit e11e0455c0d7d3d62276a0c55d9dfbc16779d691 ] If RFCOMM_DEFER_SETUP is set in the flags, rfcomm_sock_recvmsg() returns early with 0 without updating the possibly set msg_namelen member. This, in turn, leads to a 128 byte kernel stack leak in net/socket.c. Fix this by updating msg_namelen in this case. For all other cases it will be handled in bt_sock_stream_recvmsg(). Signed-off-by: Mathias Krause <mini...@googlemail.com> Cc: Marcel Holtmann <mar...@holtmann.org> Cc: Gustavo Padovan <gust...@padovan.org> Cc: Johan Hedberg <johan.hedb...@gmail.com> Signed-off-by: David S. Miller <da...@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- net/bluetooth/rfcomm/sock.c | 1 + 1 file changed, 1 insertion(+) --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -624,6 +624,7 @@ static int rfcomm_sock_recvmsg(struct ki if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { rfcomm_dlc_accept(d); + msg->msg_namelen = 0; return 0; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/