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Shutemov" To: syzbot Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Subject: Re: kernel BUG at mm/internal.h:LINE! (2) Message-ID: <20200729222139.nhok7opbvh6vr7t3@box> References: <000000000000c276c005ab9a0fb1@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000c276c005ab9a0fb1@google.com> X-Rspamd-Queue-Id: 78C6B180CC184 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.020994, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jul 29, 2020 at 01:04:21PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 68845a55 Merge branch 'akpm' into master (patches from And.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17c86c54900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f87a5e4232fdb267 > dashboard link: https://syzkaller.appspot.com/bug?extid=f62749569eab36774dc5 > compiler: gcc (GCC) 10.1.0-syz 20200507 > > Unfortunately, I don't have any reproducer for this issue yet. > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+f62749569eab36774dc5@syzkaller.appspotmail.com > > vma ffff888000153210 start 0007700000077000 end 0000000000077000 > next 0007700000000000 prev 0000000007070707 mm 0007700000000000 > prot 77700000077000 anon_vma 0000000000000000 vm_ops ffffffff885cecc0 All these 0 and 7 look very broken. Is it some magic or just garbage? -- Kirill A. Shutemov