linux-kernel - [RFC PATCH net 0/2] net/smc: Fix for race in smc link group termination

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:   Tue, 28 Dec 2021 17:20:38 +0800
From:   Wen Gu <guwen@...ux.alibaba.com>
To:     kgraul@...ux.ibm.com, davem@...emloft.net, kuba@...nel.org
Cc:     linux-s390@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, dust.li@...ux.alibaba.com,
        tonylu@...ux.alibaba.com
Subject: [RFC PATCH net 0/2] net/smc: Fix for race in smc link group termination

We encountered some crashes recently and they are caused by the
race between the access and free of link/link group in smc link
group termination. The crashes can be reproduced in frequent
abnormal link group termination, like set RNICs up/down.

This set of patches tries to fix this by extending the life cycle
of link/link group to ensure that they won't be referred to after
cleared or freed.

Best wishes,
Wen Gu

Wen Gu (2):
  net/smc: Resolve the race between link group access and termination
  net/smc: Resolve the race between SMC-R link access and clear

 net/smc/smc.h      |  1 +
 net/smc/smc_core.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++------
 net/smc/smc_core.h |  7 +++++
 3 files changed, 79 insertions(+), 9 deletions(-)

-- 
1.8.3.1