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

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Date:   Fri, 11 Sep 2020 13:53:05 -0700
From:   syzbot <syzbot+cc6fc752b3819e082d0c@...kaller.appspotmail.com>
To:     dledford@...hat.com, jgg@...pe.ca, 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)

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+cc6fc752b3819e082d0c@...kaller.appspotmail.com

Tested on:

commit:         7c003f9a RDMA/ucma: Rework ucma_migrate_id() to avoid race..
git tree:       https://github.com/jgunthorpe/linux ucma_migrate_fix
kernel config:  https://syzkaller.appspot.com/x/.config?x=3c5f6ce8d5b68299
dashboard link: https://syzkaller.appspot.com/bug?extid=cc6fc752b3819e082d0c
compiler:       gcc (GCC) 10.1.0-syz 20200507

Note: testing is done by a robot and is best-effort only.