From nobody Tue Sep 9 17:34:13 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 5BD3BC636D7 for ; Tue, 21 Feb 2023 20:18:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229601AbjBUUSp (ORCPT ); Tue, 21 Feb 2023 15:18:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229865AbjBUUSk (ORCPT ); Tue, 21 Feb 2023 15:18:40 -0500 Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F35E12821D; Tue, 21 Feb 2023 12:18:32 -0800 (PST) Received: by mail-wr1-x444.google.com with SMTP id c5so6412600wrr.5; Tue, 21 Feb 2023 12:18:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; 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=CdtGqct+MwH2EWhlTBd073J94ebfBu7k+yd8Ehy7SG8=; b=K4wARtPq5CBZcxNYArbgX74UmxkR18PCXKmmieiDZQ25FwASSxyRYxq4twVVJP+/KX w8+2CoBlO5x/2vFkFqqOkQfv4LpoTYO2E4FQsvnyEtxXGR5UNnmOIRASq5KHK+McvV7K wBMGYHcs1/6giwUNNqIt7ppBQ8ENj8g2B+93fKb1Xz+NC09d1NU9/OFjmIGy4WsNQvqb ZBAlp0QwtXS1TXBTc32WneBS+W5tUl4EnwWvmddjy2gQRfxGRTPVi/WyUaDcA3YkZSfJ /NTErW1rwbXbZLOXQqXeGLPE3I74167SGquNQX8iOVBxHgRmCviusLkjLz9mIFFLNGts LNGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=CdtGqct+MwH2EWhlTBd073J94ebfBu7k+yd8Ehy7SG8=; b=uGhY/Ybm7aaD/R4RjpFrjisVmjItgyCp2QddXflXonCYwokm15+cD/b69f4elKpL+u 6HPBpRFFaIhjs5xZR54KELrwdmFvRy8p/DQ+5sgKUeQkEFfODQ43WpffoO0O6d259oRj 8RVgsU/+joXJk6LkceZAXUqjXYaid/FBtk3Vmv1euwntd0fPe8YaqkRpCI3hoaqHzIVi PwjXWZ0dlUpYjNFKg34Am+jn5EDMhoOYuufuywsn09FGrlES2RnccSn3x2N7IfHXwWB3 CE7Zoak66njrq2NIaXgUxzG9Czu+gpHR8ulMpiq3D01eeIZwW8j9R8CN57lN7Emq43Dq tbFA== X-Gm-Message-State: AO0yUKVh2DLw+VGy4sT6E3pOaAAuaj4/3IECzyzIFqltuFg28CBqmtCn s+COTkE5VgX++WkoPrMH1QUnIDQ+o1A8 X-Google-Smtp-Source: AK7set9cPf+v02KHuhhMk+OkCfsjAL1QkdCtLNuKBrVpa9yhtMBzT0l1shf0c6ZJ9PLexMPSxNuUzg== X-Received: by 2002:adf:f590:0:b0:2c5:93fe:12b7 with SMTP id f16-20020adff590000000b002c593fe12b7mr4037706wro.41.1677010711373; Tue, 21 Feb 2023 12:18:31 -0800 (PST) Received: from fedora.mshome.net ([104.184.156.161]) by smtp.gmail.com with ESMTPSA id u14-20020a5d434e000000b002c5a1bd527dsm4656080wrr.96.2023.02.21.12.18.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Feb 2023 12:18:30 -0800 (PST) From: Gregory Price X-Google-Original-From: Gregory Price To: linux-kernel@vger.kernel.org Cc: linux-doc@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, Gregory Price Subject: [PATCH v11 1/2] syscall_user_dispatch: helper function to operate on given task Date: Tue, 21 Feb 2023 15:17:42 -0500 Message-Id: <20230221201740.2236-2-gregory.price@memverge.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230221201740.2236-1-gregory.price@memverge.com> References: <20230221201740.2236-1-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 --- 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