[Linux-stable-mirror] [stable] Security fixes

Please queue up the following fixes for stable:

[all] 3d932ee27e85 media: dvb-usb-v2: lmedm04: Improve logic checking of warm start 7bf7a7116ed3 media: dvb-usb-v2: lmedm04: move ts2020 attach to dm04_lme2510_tuner [4.9 4.14 4.15] c0f71bbb8102 media: hdpvr: Fix an error handling path in hdpvr_probe() [4.4 4.9 4.14] ae6650163c66 loop: fix concurrent lo_open/lo_release

Ben.