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Fri, 03 Mar 2023 20:36:16 -0800 (PST) Date: Fri, 03 Mar 2023 20:36:16 -0800 In-Reply-To: <0000000000001d1fb505f605c295@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003a2e5e05f60b9aff@google.com> Subject: Re: [syzbot] [hardening?] [mm?] BUG: bad usercopy in con_font_op From: syzbot To: akpm@linux-foundation.org, daniel@ffwll.ch, deller@gmx.de, dri-devel@lists.freedesktop.org, gregkh@linuxfoundation.org, jirislaby@kernel.org, keescook@chromium.org, linux-fbdev@vger.kernel.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, samuel.thibault@ens-lyon.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: DDEEB40009 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: bbiksmhxoaf6ap6o739qebjjfgga6dau X-HE-Tag: 1677904576-42135 X-HE-Meta: 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 o+23WdfY 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 22Jo9Qwi hg4kEM834BaUx+DDY9nskIiEjkR9toCXF6QB4w3bgOegdLknn9PKR89bhXgCcKyLQBxhtAlwxiFlCIEFaeHyZFJeJdOPjNkUCktl4oEWvRPDJVDdqsICH0OCI26T0ua1H12Oy7fqyyFB1iQTYyb3HmTHyJaLAr2mBzyQwHs8wYMRK5ub7YXCmA== 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 issue to: commit 24d69384bcd34b9dcaf5dab744bf7096e84d1abd Author: Samuel Thibault Date: Thu Jan 19 15:19:16 2023 +0000 VT: Add KD_FONT_OP_SET/GET_TALL operations bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=120b3232c80000 start commit: 2eb29d59ddf0 Merge tag 'drm-next-2023-03-03-1' of git://an.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=110b3232c80000 console output: https://syzkaller.appspot.com/x/log.txt?x=160b3232c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=cab35c936731a347 dashboard link: https://syzkaller.appspot.com/bug?extid=3af17071816b61e807ed syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10b71504c80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f02d9cc80000 Reported-by: syzbot+3af17071816b61e807ed@syzkaller.appspotmail.com Fixes: 24d69384bcd3 ("VT: Add KD_FONT_OP_SET/GET_TALL operations") For information about bisection process see: https://goo.gl/tpsmEJ#bisection