From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EF697C4332F for ; Mon, 12 Dec 2022 05:58:39 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4NVrXZ1nnRz3byj for ; Mon, 12 Dec 2022 16:58:38 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=QQ6MxxVg; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=145.40.73.55; helo=sin.source.kernel.org; envelope-from=bugzilla-daemon@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=QQ6MxxVg; dkim-atps=neutral Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4NVrWX2YVcz2xGH for ; Mon, 12 Dec 2022 16:57:44 +1100 (AEDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 50D5CCE0D07 for ; Mon, 12 Dec 2022 05:57:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 950F2C433EF for ; Mon, 12 Dec 2022 05:57:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670824658; bh=30g2peFCHWqm55DFq5khJFnGn+8Us2F5UyKKM7j02Vs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=QQ6MxxVgKjHWMPNEn3XaJRm7Kav+2bkEvkZl+yw6l7+SPtm0GLN9emMYHp1imjCP1 KFugFrABoCkkt1nvoR7fKN/5YlTQNt2zfx084t6LrhjcCQIjOk4QH1ULK5vufEIfMQ 90PXHNYjo/ONB9p3RzX191d98jDWLMTUSg6rY5sZlrOOAV4KnSMryfPkewsy9AP8Gl Fc9RL5/Zuqnj3fucNKkY2w2bort55CzbbpQtZAq2c1uV8V8R5xitN5JRybLo0KMP0Z tdo8ZETk6ZRV4pEh7PVyxGqDaa2rtKjCfF8V28YSaqzL0nnTueALl8lwG/u2t0hF9W lFDdT/QNzU6Ng== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 793A9C43141; Mon, 12 Dec 2022 05:57:38 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linuxppc-dev@lists.ozlabs.org Subject: [Bug 214913] [xfstests generic/051] BUG: Kernel NULL pointer dereference on read at 0x00000108 NIP [c0000000000372e4] tm_cgpr_active+0x14/0x40 Date: Mon, 12 Dec 2022 05:57:38 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo platform_ppc-64@kernel-bugs.osdl.org X-Bugzilla-Product: Platform Specific/Hardware X-Bugzilla-Component: PPC-64 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: michael@ellerman.id.au X-Bugzilla-Status: NEEDINFO X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: platform_ppc-64@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" https://bugzilla.kernel.org/show_bug.cgi?id=3D214913 --- Comment #9 from Michael Ellerman (michael@ellerman.id.au) --- I assume it's an io_uring IO worker. They're created via create_io_worker() -> create_io_thread(). They pass a non-NULL `args->fn` to copy_process() -> copy_thread(), so we e= nd up in the "kernel thread" branch of the if, which sets p->thread.regs =3D N= ULL. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=