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

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Message-ID: <20200911120222.GT87483@ziepe.ca>
Date:   Fri, 11 Sep 2020 09:02:22 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     syzbot <syzbot+cc6fc752b3819e082d0c@...kaller.appspotmail.com>
Cc:     dledford@...hat.com, leon@...nel.org, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in ucma_close (2)

On Thu, Sep 10, 2020 at 07:09:24AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    34d4ddd3 Merge tag 'linux-kselftest-5.9-rc5' of git://git...
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1002ea2d900000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=a9075b36a6ae26c9
> dashboard link: https://syzkaller.appspot.com/bug?extid=cc6fc752b3819e082d0c
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1600e053900000

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git 308571debccd7004acf02ea1b7163a96ad772292

Jason