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[209.85.220.69]) by mx.google.com with SMTPS id p14sor21653978ios.125.2019.07.19.09.34.00 for (Google Transport Security); Fri, 19 Jul 2019 09:34:00 -0700 (PDT) Received-SPF: pass (google.com: domain of 3-paxxqkbajedjk5v66zcvaa3y.19916zfdzcx98ez8e.x97@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3-paxxqkbajedjk5v66zcvaa3y.19916zfdzcx98ez8e.x97@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3-PAxXQkbAJEDJK5v66zCvAA3y.19916zFDzCx98Ez8E.x97@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Google-Smtp-Source: APXvYqzXnjpSQV9iFQbyh8yurehonYeDVnnn919X9PLqsJYbWXJy2VpoCVH3ZDalQ76trhEOtpL1aMd4nm27xBBAS+sOD1mk8YpL MIME-Version: 1.0 X-Received: by 2002:a5d:8c87:: with SMTP id g7mr47222471ion.85.1563554040200; Fri, 19 Jul 2019 09:34:00 -0700 (PDT) Date: Fri, 19 Jul 2019 09:34:00 -0700 In-Reply-To: <000000000000490679058e0245ee@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000027494e058e0b4b3f@google.com> Subject: Re: KASAN: use-after-free Read in finish_task_switch (2) From: syzbot To: aarcange@redhat.com, akpm@linux-foundation.org, christian@brauner.io, davem@davemloft.net, ebiederm@xmission.com, elena.reshetova@intel.com, guro@fb.com, hch@infradead.org, james.bottomley@hansenpartnership.com, jasowang@redhat.com, jglisse@redhat.com, keescook@chromium.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-parisc@vger.kernel.org, luto@amacapital.net, mhocko@suse.com, mingo@kernel.org, mst@redhat.com, namit@vmware.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, wad@chromium.org, yuehaibing@huawei.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: syzbot has bisected this bug to: commit 7f466032dc9e5a61217f22ea34b2df932786bbfc Author: Jason Wang Date: Fri May 24 08:12:18 2019 +0000 vhost: access vq metadata through kernel virtual address bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=123faf70600000 start commit: 22051d9c Merge tag 'platform-drivers-x86-v5.3-2' of git://.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=113faf70600000 console output: https://syzkaller.appspot.com/x/log.txt?x=163faf70600000 kernel config: https://syzkaller.appspot.com/x/.config?x=135cb826ac59d7fc dashboard link: https://syzkaller.appspot.com/bug?extid=7f067c796eee2acbc57a syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c1898fa00000 Reported-by: syzbot+7f067c796eee2acbc57a@syzkaller.appspotmail.com Fixes: 7f466032dc9e ("vhost: access vq metadata through kernel virtual address") For information about bisection process see: https://goo.gl/tpsmEJ#bisection