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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="ME/FJRfX"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C075D606FAC9; Wed, 4 Nov 2026 19:36:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ME/FJRfX Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95AA31F000C1; Wed, 4 Nov 2026 19:35:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793820966; bh=RCWYzTdROaZ//Ublq96X/PsjFPNs26aKqDomYMjplOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ME/FJRfXHJFiJdRPuFY8HbJeu+GJeM1uYMSHhRXC3OyCBFoBbHe/D+KeCbkSHUcc+ kLRnw4KPAQXBd/Lm2rxl+osnRqATeVzThclIJcTYxyw83fwPKWjsdttrzz2MJEJ/6F npCV8gjOwaHDC61e0ru1NTfEA8b0b9x7dSf/HzSrhuivx0LurSS5jZoyjtt0F/X5HF VXCm5Gcq8bWGfXJvVTfcnPDEXQVmN0yImiDrAgCIzYQ7ciRBherm+QOR9W6FvpFf9V +E2b6pif2bObHvbMb8emuD8Je5Z+LHQE+m9YVr5ffRfEUXrIRpnoiS5t/MTpZE9nue yYDTpnmmsO8rw== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever Subject: [PATCH RESEND v2 01/23] alpha: srm_env: let procfs copy in writes Date: Wed, 4 Nov 2026 20:35:52 +0100 Message-ID: <20261104-work-procfs-arch-v2-1-2aeb952c9597@kernel.org> In-Reply-To: <20261104-work-procfs-arch-v2-0-2aeb952c9597@kernel.org> References: <20261104-work-procfs-arch-v2-0-2aeb952c9597@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1631; i=brauner@kernel.org; h=from:subject:message-id; bh=ud6jo66qun6GxlQdhdvRvLMRIAP9XF8+raIGbqJmJWQ=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97ngrnBxmYyak9tmw1FJNeJLkRYtVzupn21htlqi1O tScYHfuKGVhEONikBVTZHFoNwmXW85TsdkoUwNmDisTyBAGLk4BmMjpJkaGRUtzVix3XJqTVWf1 dU6h87OwGM+PZ2ve597KXb144TfGWIZ/ZoovQk90zVv4S5HDJPnSp5RpZyfb5iyb8PbjaTdr44T nLAA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit Implement ->proc_write_buf() so procfs copies in what is written to /proc/srm_environment/* before it pins the entry, and hand that copy to the console callback through the page it used before. Signed-off-by: Christian Brauner (Amutable) --- arch/alpha/kernel/srm_env.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/arch/alpha/kernel/srm_env.c b/arch/alpha/kernel/srm_env.c index faafc2df7886..6a1742b09a82 100644 --- a/arch/alpha/kernel/srm_env.c +++ b/arch/alpha/kernel/srm_env.c @@ -81,7 +81,7 @@ static int srm_env_proc_show(struct seq_file *m, void *v) return ret; } -static ssize_t srm_env_proc_write(struct file *file, const char __user *buffer, +static ssize_t srm_env_proc_write(struct file *file, char *buffer, size_t count, loff_t *pos) { int res; @@ -92,13 +92,8 @@ static ssize_t srm_env_proc_write(struct file *file, const char __user *buffer, if (!buf) return -ENOMEM; - res = -EINVAL; - if (count >= PAGE_SIZE) - goto out; - res = -EFAULT; - if (copy_from_user(buf, buffer, count)) - goto out; + memcpy(buf, buffer, count); buf[count] = '\0'; ret1 = callback_setenv(id, buf, count); @@ -109,14 +104,13 @@ static ssize_t srm_env_proc_write(struct file *file, const char __user *buffer, res = (int) ret1; } - out: free_page((unsigned long)buf); return res; } static const struct proc_ops srm_env_proc_ops = { .proc_show = srm_env_proc_show, - .proc_write = srm_env_proc_write, + .proc_write_buf = srm_env_proc_write, }; static int __init -- 2.53.0