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[2620:137:e000::1:20]) by mx.google.com with ESMTP id k5-20020a17090a3e8500b00240e4b9a943si8911709pjc.143.2023.04.08.09.09.03; Sat, 08 Apr 2023 09:09:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=e6uhBnJs; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230195AbjDHPzE (ORCPT + 99 others); Sat, 8 Apr 2023 11:55:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39516 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230168AbjDHPzD (ORCPT ); Sat, 8 Apr 2023 11:55:03 -0400 Received: from mail-oa1-x36.google.com (mail-oa1-x36.google.com [IPv6:2001:4860:4864:20::36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E6B8FF0F for ; Sat, 8 Apr 2023 08:55:02 -0700 (PDT) Received: by mail-oa1-x36.google.com with SMTP id 586e51a60fabf-18436e0b673so692698fac.0 for ; Sat, 08 Apr 2023 08:55:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680969302; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=Qy8lyv752rLSQxtmaTVe33r7tclcAkx2q5NW4/xJORo=; b=e6uhBnJsqB06TyLLKmDh7aoOo+UXoCrgiHLDjXiIDmKTxcG2YwF0juYTNF/w/yAy0d 9BJCq5Joe5K1JKC+JhVf8chBQKU23tfajOqGCLXnn27B9JYV6DWib77rNFORLTELvsEF 4OODo8tns8pnGKShfhsRdZfV/M5RSx8qRCLUeLSqqafKKooBx4yYl0iZIVFP3GDyIFFL Xf/cUYv/6z2oJgpIRvV+UdgvyhbNleexPY0tx9y7vPoZWPxjeWgQnQG4pjbvlf929bEy kujZDFbilIauPWjJfMenZ/Fq9EMGbct5h8rAWCeRc/IW3qNkoJnDayX+HOeFhQ/1gXDE 2K2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680969302; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Qy8lyv752rLSQxtmaTVe33r7tclcAkx2q5NW4/xJORo=; b=n2fAYXYtRRPx1XnreUepwdjIyA7C4tRxDO3iNajMUHxY5kxE11dfaLK0yblPOJohcg +WCJkfwqZ9eQy5PAFdBpiAwofZqKRYn7Zc8OlHpmUiZSJdK/jLQEnnkYZtuBvLXyIT/L 5Ue/edNCj+x9hl0xtJHX9pJvkMgmP/O/yyUkPL7WuITHxrzCgDBZWvBjLZQ3cYzI6Htq Sy8RZbgo+6nGf4l53xarzfsJ1bW9B4YCh4JLWnpyDoI8L7zF5r/4AryV2/fh9fJlz2UI VZO4mzaiQo4C6+sFjesdH1a8NEsuw9/Fymrp9pnoFDDe4Z3hYRyHOvlKwIngNlNVWI4K gnxw== X-Gm-Message-State: AAQBX9eKsgbe3hoUV8qAqmDiIqAFg6FqI0j0zM5Njek8Yu4A+f+hlrIW aC9EYTfhjj3ovvOLlnEpqZAXwDnhoCQ8L+HO4cE= X-Received: by 2002:a05:6870:12cf:b0:17a:b713:63e9 with SMTP id 15-20020a05687012cf00b0017ab71363e9mr1113212oam.4.1680969301826; Sat, 08 Apr 2023 08:55:01 -0700 (PDT) MIME-Version: 1.0 References: <323c1b8d-c778-3175-79a0-5adcc0b470b9@kernel.org> In-Reply-To: <323c1b8d-c778-3175-79a0-5adcc0b470b9@kernel.org> From: Dipanjan Das Date: Sat, 8 Apr 2023 08:54:51 -0700 Message-ID: Subject: Re: BUG: unable to handle kernel paging request in n_tty_open To: Jiri Slaby Cc: Greg KH , Linux Kernel Mailing List , syzkaller , Marius Fleischer , Priyanka Bose Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Feb 12, 2023 at 10:18=E2=80=AFPM Jiri Slaby = wrote: > COuld you explain how this assignment can ever fail? ldata is either > allocated correctly (non-NULL) and the assignment cannot fail or not > (NULL) and the assignment cannot fail (as it doesn't happen). Sorry for the late reply. We just reported our understanding of the issue here: https://groups.google.com/u/1/g/syzkaller/c/BsxSggrhEMw --=20 Thanks and Regards, Dipanjan