From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: David Miller <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>,
rds-devel@oss.oracle.com,
Santosh Shilimkar <santosh.shilimkar@oracle.com>
Subject: Re: KASAN: out-of-bounds Read in rds_cong_queue_updates (2)
Date: Wed, 13 Jun 2018 06:19:29 -0400 [thread overview]
Message-ID: <20180613101929.GA19385@oracle.com> (raw)
In-Reply-To: <CACT4Y+bM4jA4Ptrdb1x8xVONJOCurcwYKL+kgxFCdk7R4g9Nvw@mail.gmail.com>
On (06/13/18 09:52), Dmitry Vyukov wrote:
> I think this is:
>
> #syz dup: KASAN: use-after-free Read in rds_cong_queue_updates
Indeed. We'd had a discussion about getting a dump of threads
using sysrq (or similar), given the challenges around actually
getting a crash dump, is that now possible? That will certainly help.
another missing bit is that we still need the sychronize_net()
in rds_release(). I realize synchronize_net() is sub-optimal for perf,
but leaving this existing hole where races can occur in unexpected
manifestations is not ideal either.
(See https://www.spinics.net/lists/netdev/msg475074.html for earlier
discussion thread)
--Sowmini
next prev parent reply other threads:[~2018-06-13 10:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 7:51 KASAN: out-of-bounds Read in rds_cong_queue_updates (2) syzbot
2018-06-13 7:52 ` Dmitry Vyukov
2018-06-13 10:19 ` Sowmini Varadhan [this message]
2018-06-13 11:14 ` Dmitry Vyukov
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