netdev - [stable 4.4.y] ppp: defer netns reference release for ppp channel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 21 Nov 2016 21:12:15 +0000
From:   Simon Arlott <simon@...e.lp0.eu>
To:     netdev <netdev@...r.kernel.org>
Subject: [stable 4.4.y] ppp: defer netns reference release for ppp channel

Please apply the following patch to linux-stable 4.4.y:

  commit 205e1e255c479f3fd77446415706463b282f94e4
  ppp: defer netns reference release for ppp channel

This is already present in 4.8.y and fixes an issue with ppp channels
that would otherwise cause a BUG() in ppp_pernet while a global ppp
mutex is held, preventing further ppp connections from being
established.

The issue is reproducible by having pppd use a PPPoE server that closes
new connections immediately (e.g. rp-pppoe "pppoe-server -q /bin/true").

-- 
Simon Arlott