Date: Fri, 27 Jun 2014 15:02:02 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> Subject: Re: LMS-2014-06-16-5: Linux Kernel LZ4 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, +-- On Fri, 27 Jun 2014, Eddie Chapman wrote --+ | I think it's worth pointing out that the Linux kernel only introduced LZ4 | support in 3.11. This is why from the new kernel.org stable releases | yesterday, only 3.14.9 and 3.15.2 contain the LZ4 patch. 3.10.45 and 3.4.95 | don't. It's been discussed in the other thread, yet just for the record, a reply from the upstream author: +-- On Fri, 27 Jun 2014 Yann Collet wrote --+ |Hi Prasad | |Nope, latest lz4 release is not affected. | | |Moreover, even the linux kernel implementation is safe, for now. To trigger |the risk, the program calling the lz4 linux kernel implementation must feed |the decoder with blocks of more than 8 MB. None of them is doing that right |now, so it's not exploitable. | |However, it's true that, in the future, maybe one program may wander into |this area. So it's a good thing to update the LZ4 implementation today, |before the risk get potentially exposed by a yet unknown future program. | | |I feel this version of the story should be more widely answered. The current |risk has been overblown. If you have some way to answer to the sec-list |article you linked to, could you please make it known ? In the meantime, I'm |in contact with Greg k-h, to make sure the linux kernel implementation will |get fixed for the next Linux release. | |Best regards | Thank you. - -- Prasad J Pandit / Red Hat Product Security Team 47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJTrToSAAoJEN0TPTL+WwQfJ84P/1NW/X6voek0O8LAEsu5Jkiv DE/nV6ByNV5kFNe9K+CG4QOeojRe9mYftwc/6F7eWKVZh7Q+qn3Slh2FhQMRY4R3 AbsvDAKLTpJWVxkqjtJR91tV2/yOA2avkg413qRD6agszJqydG2z9Zapt1jmVmTc UbvNlLUrEgVNBL1yd9dMNoQ0iLtYyja1EYw7IPejKhzIyry8MxUbnCXWQOysCXTT HSJwJyVOgX0UE2OOEOKOqscsKa7R62XQxYkcWswGY+WUYXJvETx12Zydu2umB4f1 RsJS3MyJMoi1FL+s+sNy3WQvbdv93VFpD1GOwF4Hv2sS7aaaQN9k/HfhCGBuz58Q dprPZMh+DD6LioUEdrHzjWivx5kn/jusgVthW0kE0rSHR++vEGwXqNx6HW9yyu/0 ApApxc/UrkMwHFDh5yHg2dxleGhogM4kKHCFD/dLnKNyM1AGKD4mocY1aVW6ufRI teqRXiK4NhCV9voJdbBXO+6QLL/A+2DVUlfJJ8DYKByGC8YnPNSjsH11oFs4ySFM 6aQ29iFHi/rggqOyXW6hxPl+ugT2KDrStDfI72Ne/xmM47HYK/WwxjqJ6o7QCtYT ld24vu2Xb51vYAlu2WcK66epm8AAxj4VWhB8U+16AGRZSmkHbfQOTJJ0d8YTR/uM gS0ASQzncWHgm8NxMD27 =BneN -----END PGP SIGNATURE-----
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