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

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Message-ID: <CACT4Y+a6P+q8jtRrd=cAf5hWbqQO4CQdWUaCCX-ygRbGsWHnGQ@mail.gmail.com>
Date:   Fri, 24 Aug 2018 16:10:58 -0700
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+8967084bcac563795dc6@...kaller.appspotmail.com>
Cc:     Sowmini Varadhan <sowmini.varadhan@...cle.com>,
        David Miller <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>, linux-rdma@...r.kernel.org,
        netdev <netdev@...r.kernel.org>, rds-devel@....oracle.com,
        Santosh Shilimkar <santosh.shilimkar@...cle.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: Re: KASAN: use-after-free Read in __rhashtable_lookup (2)

On Fri, Aug 24, 2018 at 4:05 PM, syzbot
<syzbot+8967084bcac563795dc6@...kaller.appspotmail.com> wrote:
>
>
>> #syz dup KASAN: use-after-free Read in rds_find_bound
>
>
> unknown command "dup"


You need a colon after dup.

But this can't possibly be a dup of that bug. That bug was fixed in February:
https://syzkaller.appspot.com/bug?extid=93a5839deb355537440f

And this crash happened a day ago. This is a different bug. If you dup
it to a closed one, this one will also be considered closed, and then
a new crash will immediately create a new bug.



>> The problem is a missing synchronize_net() in rds_release.
>> References:
>>    https://www.spinics.net/lists/netdev/msg475074.html
>>    https://www.spinics.net/lists/netdev/msg507908.html
>
>
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