From nobody Tue Sep 9 06:35:09 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22690C6FD1D for ; Fri, 7 Apr 2023 17:19:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229638AbjDGRTE (ORCPT ); Fri, 7 Apr 2023 13:19:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53582 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230039AbjDGRSz (ORCPT ); Fri, 7 Apr 2023 13:18:55 -0400 Received: from mail-ot1-x341.google.com (mail-ot1-x341.google.com [IPv6:2607:f8b0:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBF4440FB; Fri, 7 Apr 2023 10:18:45 -0700 (PDT) Received: by mail-ot1-x341.google.com with SMTP id f19-20020a9d5f13000000b00693ce5a2f3eso22363632oti.8; Fri, 07 Apr 2023 10:18:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680887925; x=1683479925; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=sLteJQ8c+SN8oNJjCjxoIRPKFzLnI8skpOxBYxbnER4=; b=LVmzZcc4ItOFp3vZDq/gdzosshgwAr0ww023QcO3qkGDF6IeynqiyGwg7ts2NY5tox 76VACvntsuvoCYA4nLD8by+CStm6RuBjW9vjyeaipcoX5Qv3EtCuqDjOikiI9rCRWrdo RMRNxSiMqqOvWvP/gpCwBRYGwWTWpNi+pwfXJyp1vS3GEWf2sRRLz9cuyTz4VDlisEkN 0xz74QfUwmwtKygBH3eMGPDk8oyZzw3loY59ChPX51cOQZu4hGwNbK+q8RPisSSuR0Gb nrBOyqnKTMjmDFH2Q10OkRiUQ/ezc/iFG31UbVxY03eMy5rIWqlfDH+GztnizOEporb/ BX+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680887925; x=1683479925; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=sLteJQ8c+SN8oNJjCjxoIRPKFzLnI8skpOxBYxbnER4=; b=5WlC5F7qlR+atCK/RqYS4nx3DpUQSeNfHSUEFhOxdjawFDRYpQEolN6M1CaywnyDgh einqw9qLa/dpp6AvxRg3XPXgeDjYxfWyqdF66nrE0nT/PfC4pHFnBJjaJzu1GskF8Eeu zhvIxVZ+6ovhVEKDO2WXdh45yqYWyTZIp5u3jcFjh9I1nNcP98zI7/FCwYRurbVvZ620 fzjSO/JO4xi+l3rP17EitJ7E6Isr9kzaDm41QkEuHSYy2x4F2ZuwNhmxS9sTheh4G7kh UrsmjUY8rgpQ6bzEg0fLmJIqA6cciokKSm1uuQSFSnyy03ZvNxmj/npGtqQlWR1Dfiqg KSCA== X-Gm-Message-State: AAQBX9eoOb/HTni+9DZN7gVCVAP2+M9bN1HlaJLGvbBSlRIV4DpHezu3 Uow36F5YCBpTi3hy4ko+CiLO5cgrXBb2kU4= X-Google-Smtp-Source: AKy350Y/gKRvyuVHJithHouBOyeSoXFbnST168BAY2wAAOZ4E/7+p+xV2fEEc9gqgJuQo5C4vVAiQw== X-Received: by 2002:a05:6830:13d8:b0:6a1:373d:b0a6 with SMTP id e24-20020a05683013d800b006a1373db0a6mr1212595otq.23.1680887925115; Fri, 07 Apr 2023 10:18:45 -0700 (PDT) Received: from fedora.mshome.net ([104.184.156.161]) by smtp.gmail.com with ESMTPSA id l9-20020a9d7349000000b006a2ddc13c46sm1816730otk.78.2023.04.07.10.18.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Apr 2023 10:18:44 -0700 (PDT) From: Gregory Price X-Google-Original-From: Gregory Price To: linux-kernel@vger.kernel.org Cc: linux-doc@vger.kernel.org, linux-arch@vger.kernel.org, oleg@redhat.com, avagin@gmail.com, peterz@infradead.org, luto@kernel.org, krisman@collabora.com, tglx@linutronix.de, corbet@lwn.net, shuah@kernel.org, catalin.marinas@arm.com, arnd@arndb.de, Gregory Price Subject: [PATCH v16 1/4] syscall_user_dispatch: helper function to operate on given task Date: Fri, 7 Apr 2023 13:18:31 -0400 Message-Id: <20230407171834.3558-2-gregory.price@memverge.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230407171834.3558-1-gregory.price@memverge.com> References: <20230407171834.3558-1-gregory.price@memverge.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Preparatory patch ahead of set/get interfaces which will allow a ptrace to get/set the syscall user dispatch configuration of a task. This will simplify the set interface and consolidates error paths. Signed-off-by: Gregory Price Reviewed-by: Oleg Nesterov --- kernel/entry/syscall_user_dispatch.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/kernel/entry/syscall_user_dispatch.c b/kernel/entry/syscall_us= er_dispatch.c index 0b6379adff6b..22396b234854 100644 --- a/kernel/entry/syscall_user_dispatch.c +++ b/kernel/entry/syscall_user_dispatch.c @@ -68,8 +68,9 @@ bool syscall_user_dispatch(struct pt_regs *regs) return true; } =20 -int set_syscall_user_dispatch(unsigned long mode, unsigned long offset, - unsigned long len, char __user *selector) +static int task_set_syscall_user_dispatch(struct task_struct *task, unsign= ed long mode, + unsigned long offset, unsigned long len, + char __user *selector) { switch (mode) { case PR_SYS_DISPATCH_OFF: @@ -94,15 +95,21 @@ int set_syscall_user_dispatch(unsigned long mode, unsig= ned long offset, return -EINVAL; } =20 - current->syscall_dispatch.selector =3D selector; - current->syscall_dispatch.offset =3D offset; - current->syscall_dispatch.len =3D len; - current->syscall_dispatch.on_dispatch =3D false; + task->syscall_dispatch.selector =3D selector; + task->syscall_dispatch.offset =3D offset; + task->syscall_dispatch.len =3D len; + task->syscall_dispatch.on_dispatch =3D false; =20 if (mode =3D=3D PR_SYS_DISPATCH_ON) - set_syscall_work(SYSCALL_USER_DISPATCH); + set_task_syscall_work(task, SYSCALL_USER_DISPATCH); else - clear_syscall_work(SYSCALL_USER_DISPATCH); + clear_task_syscall_work(task, SYSCALL_USER_DISPATCH); =20 return 0; } + +int set_syscall_user_dispatch(unsigned long mode, unsigned long offset, + unsigned long len, char __user *selector) +{ + return task_set_syscall_user_dispatch(current, mode, offset, len, selecto= r); +} --=20 2.39.1