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Wed, 20 Nov 2019 11:52:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=XhBRlgTYSsBApDath+tcXSTGDYeEdj9JFcoeoXzALkc=; b=FdIKTWgigJVhfOJYKBfAByq6a6Z304jR90VOav7SdLmf8pBzO5EeSDlFUq48uSI1Rc 3tqhkpOfLrYr9mF8EhwNS/fFStqs8dKK/Rvw81HhPbYos9/5UQ/TB5fhFVfqg8KM8zIc OYs6DIrMbNWLD9der2RUzk5Sl9dmSZpZf/Zb3OvLHO9cndheN2SpA3+TF43hrhd0UGF6 wO9qS5rRXdXJnfk/N4dR4N0REtsfkhen3nselTOTRiJHxgpZTRbgUArSewsO3pZ/Jx8+ vRyZTYRMcVVBirQPzUoTCFzHsUham05jdhD/8Js/+SMfkvK7ftv3WM1BdAFa3AJs3lsH 8QaQ== X-Gm-Message-State: APjAAAVkB2EcF/SYLRuw3qzJL/WKvn2IIXRKvvOo0jEq+FSq3RFMg5Th TY2FbZ93OegkDmaU45iP6SBTel01sRA9uo/9yuYqp0hbVdwV X-Google-Smtp-Source: APXvYqw3+A+07brQWjAPceJpRxuwfPPco+IwB2wmSin7utykaTY7p8Bz5xO7eX7AKCM3IovDSsUHEzwIE7wdHi9CUYsqWNMP16eD MIME-Version: 1.0 X-Received: by 2002:a92:3b9a:: with SMTP id n26mr5774182ilh.82.1574279521405; Wed, 20 Nov 2019 11:52:01 -0800 (PST) Date: Wed, 20 Nov 2019 11:52:01 -0800 In-Reply-To: <0000000000006e31980579315914@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a6993c0597cc8375@google.com> Subject: Re: INFO: task hung in __do_page_fault (2) From: syzbot To: acme@kernel.org, akpm@linux-foundation.org, arnd@arndb.de, corbet@lwn.net, ebiederm@xmission.com, keescook@chromium.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux@dominikbrodowski.net, luto@kernel.org, mcgrof@kernel.org, mingo@redhat.com, peterz@infradead.org, sudipm.mukherjee@gmail.com, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org 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 0161028b7c8aebef64194d3d73e43bc3b53b5c66 Author: Andy Lutomirski Date: Mon May 9 22:48:51 2016 +0000 perf/core: Change the default paranoia level to 2 bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15910e86e00000 start commit: 18d0eae3 Merge tag 'char-misc-4.20-rc1' of git://git.kerne.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=17910e86e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13910e86e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=342f43de913c81b9 dashboard link: https://syzkaller.appspot.com/bug?extid=6b074f741adbd93d2df5 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12482713400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158fd4a3400000 Reported-by: syzbot+6b074f741adbd93d2df5@syzkaller.appspotmail.com Fixes: 0161028b7c8a ("perf/core: Change the default paranoia level to 2") For information about bisection process see: https://goo.gl/tpsmEJ#bisection