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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=g5b/uq1jPzIHWKTG4KkvcGY51W0aJ/wSvlfQDeK7EKs=; b=hjMx+90YjrONkVfLjNNLOdN2V850iSOIf44GgmdQGAR5Qs1JouIhj5SomERd3/QkmQ CtmI+HJyK5wg4LOtv3dIbTJxzsjAjwJXWlYR01c54/AJCctxzYI9vt4I63dabArdv72I 1KTdbDTa3UU2DZC81NwnwebILCcI9XjPJrvOYmJlXx/FXdDEDAiV+nRm4SzMARoKvi5h wTdUbA8VunRVr0lEwehrYu+x058puOy42d/w5I5irSE9mGSSfaJ07Dr4ieKVeaEpTZ+N eTwIN5aq86U+eglCJ+HQypTQumGV0vf9zYHA+k2Tdegov5AOA8a6xpn6n04mYWfGToAX bjoA== X-Gm-Message-State: APjAAAUQMHkeA8zv+eJ6W6iLgmaSNj/fyp+87beUkve+xNGWUzsU7BUW Uzyi8edVI6/+DiJ9sDzQ8MOHjUL7Zv7Wdvt2IrS0bBYeMKi/ X-Google-Smtp-Source: APXvYqxZsTelPOF42qriET4H2YWOnXA8pSOyk4C53x/sSGq8f4RGlUtiE6R/yVt6douHfDWehA+zCy3otomUVEeICPtM27LaOmVm MIME-Version: 1.0 X-Received: by 2002:a5e:c302:: with SMTP id a2mr7896816iok.295.1572570121338; Thu, 31 Oct 2019 18:02:01 -0700 (PDT) Date: Thu, 31 Oct 2019 18:02:01 -0700 In-Reply-To: <000000000000d73b12059608812b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000077853c05963e8313@google.com> Subject: Re: WARNING in print_bfs_bug From: syzbot To: akpm@linux-foundation.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, f.fainelli@gmail.com, hannes@cmpxchg.org, hawk@kernel.org, hughd@google.com, idosch@mellanox.com, jakub.kicinski@netronome.com, jglisse@redhat.com, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, kirill.shutemov@linux.intel.com, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mkubecek@suse.cz, netdev@vger.kernel.org, petrm@mellanox.com, roopa@cumulusnetworks.com, sfr@canb.auug.org.au, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, william.kucharski@oracle.com, willy@infradead.org, yhs@fb.com, yoshfuji@linux-ipv6.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 9c61acffe2b8833152041f7b6a02d1d0a17fd378 Author: Song Liu Date: Wed Oct 23 00:24:28 2019 +0000 mm,thp: recheck each page before collapsing file THP bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15be4e14e00000 start commit: 49afce6d Add linux-next specific files for 20191031 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=17be4e14e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13be4e14e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c5f119b33031056 dashboard link: https://syzkaller.appspot.com/bug?extid=62ebe501c1ce9a91f68c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c162f4e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=131b5eb8e00000 Reported-by: syzbot+62ebe501c1ce9a91f68c@syzkaller.appspotmail.com Fixes: 9c61acffe2b8 ("mm,thp: recheck each page before collapsing file THP") For information about bisection process see: https://goo.gl/tpsmEJ#bisection