linux-kernel - [PATCH 0/3] ext4: fix spectre v1 gadgets

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]

Message-Id: <20180727162357.30801-1-jcline@redhat.com>
Date:   Fri, 27 Jul 2018 16:23:54 +0000
From:   Jeremy Cline <jcline@...hat.com>
To:     Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jeremy Cline <jcline@...hat.com>
Subject: [PATCH 0/3] ext4: fix spectre v1 gadgets

Hi folks,

This patch set fixes a few Spectre v1 gadgets in ext4 detected with the
help of Smatch.

Note that because the speculation window is large, the policy is to stop
the speculative out-of-bounds load and not worry if the attack can be
completed with a dependent load or store[0].

[0] https://marc.info/?l=linux-kernel&m=152449131114778

Jeremy Cline (3):
  ext4: super: Fix spectre gadget in ext4_quota_on
  ext4: super: Fix spectre gadgets in ext4_quota_{read,write,off}
  ext4: mballoc: Fix spectre gadget in ext4_mb_simple_scan_group

 fs/ext4/mballoc.c |  2 ++
 fs/ext4/super.c   | 20 ++++++++++++++++----
 2 files changed, 18 insertions(+), 4 deletions(-)

-- 
2.17.1