linux-kernel - Re: KASAN: use-after-free Read in __list_add

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

Message-ID: <CAL1RGDVNaJ8OG+4ajmCZN1GnvsZUAqY3LXMRPv57mGSPJyhwAQ@mail.gmail.com>
Date:   Tue, 15 May 2018 13:49:23 -0700
From:   Roland Dreier <roland@...estorage.com>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     linux-rdma@...r.kernel.org, Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>, rds-devel@....oracle.com,
        syzbot <syzbot+db1c219466daac1083df@...kaller.appspotmail.com>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in __list_add_valid (5)

> Still reproducible on Linus' tree (commit 66e1c94db3cd4e) and on linux-next
> (next-20180511).  Here's a simplified reproducer:

Thanks!  That's a fantastic test case.

The issue is a race where rdma_listen() sees invalid state in the
middle of an rdma_bind_addr() call that will ultimately fail.  I'll
send a proposed patch shortly.

 - R.