From: Qiujun Huang <anenbupt@gmail.com>
To: Will Deacon <will@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
syzbot <syzbot+cea71eec5d6de256d54d@syzkaller.appspotmail.com>,
ardb@kernel.org, davem@davemloft.net, guohanjun@huawei.com,
kuba@kernel.org, linux-kernel@vger.kernel.org,
linux-sctp@vger.kernel.org, marcelo.leitner@gmail.com,
mingo@kernel.org, netdev@vger.kernel.org, nhorman@tuxdriver.com,
syzkaller-bugs@googlegroups.com, vyasevich@gmail.com
Subject: Re: WARNING: refcount bug in sctp_wfree
Date: Tue, 17 Mar 2020 00:25:16 +0800 [thread overview]
Message-ID: <CADG63jDcuBNOVRoRX7oi1YmwuN0g7jpvDB4yNdOxwc13hvoNxA@mail.gmail.com> (raw)
In-Reply-To: <20200316155119.GB13004@willie-the-truck>
On Mon, Mar 16, 2020 at 11:52 PM Will Deacon <will@kernel.org> wrote:
>
> On Tue, Mar 10, 2020 at 09:01:18AM -0700, Kees Cook wrote:
> > On Tue, Mar 10, 2020 at 02:39:01AM -0700, syzbot wrote:
> > > syzbot has bisected this bug to:
> > >
> > > commit fb041bb7c0a918b95c6889fc965cdc4a75b4c0ca
> > > Author: Will Deacon <will@kernel.org>
> > > Date: Thu Nov 21 11:59:00 2019 +0000
> > >
> > > locking/refcount: Consolidate implementations of refcount_t
> >
> > I suspect this is just bisecting to here because it made the refcount
> > checks more strict?
>
> Yes, this is the commit that enables full refcount checking for all
> architectures unconditionally, so it's the canary in the coalmine rather
> than the source of the problem.
Yes, I tracked it down. And sent out a fix:
https://lore.kernel.org/netdev/1584330804-18477-1-git-send-email-hqjagain@gmail.com
>
> Will
next prev parent reply other threads:[~2020-03-16 16:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-10 1:35 WARNING: refcount bug in sctp_wfree syzbot
2020-03-10 9:39 ` syzbot
2020-03-10 16:01 ` Kees Cook
2020-03-16 15:51 ` Will Deacon
2020-03-16 16:25 ` Qiujun Huang [this message]
2020-03-10 16:45 ` 黄秋钧
2020-03-11 15:00 ` Qiujun Huang
2020-03-14 2:51 ` Qiujun Huang
2020-03-14 2:59 ` Qiujun Huang
2020-03-14 2:54 ` Qiujun Huang
2020-03-14 2:55 ` Qiujun Huang
2020-03-14 4:08 ` syzbot
2020-03-14 4:04 ` syzbot
2020-03-14 5:10 ` Qiujun Huang
2020-03-14 9:03 ` syzbot
2020-03-15 7:59 ` Qiujun Huang
2020-03-15 8:12 ` syzbot
2020-03-20 11:11 ` Qiujun Huang
2020-03-20 14:28 ` syzbot
2020-03-22 4:11 ` Qiujun Huang
2020-03-22 4:39 ` syzbot
2020-03-22 6:41 ` Qiujun Huang
2020-03-22 7:18 ` syzbot
2020-03-26 15:38 ` Qiujun Huang
2020-03-26 15:38 ` syzbot
2020-03-26 15:38 ` syzbot
2020-03-26 15:53 ` Qiujun Huang
2020-03-26 15:53 ` syzbot
2020-03-26 16:17 ` Qiujun Huang
2020-03-26 21:25 ` syzbot
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