From patchwork Mon Jul 1 17:48:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13718495 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8054316EBF7; Mon, 1 Jul 2024 17:48:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719856093; cv=none; b=F6VdVlBzrYD6R2XqZ8mhFnhda8WJG8PLTEi6tKmkoWQI5P7IknZt7pRo34spfz7xW0WIEMkRkzgnHnukeyRUgOdMbRjQC9uMi4fgM+OV5sfOTFGfLg50Xf5E3h4BIynScQZbXjSUDjcLdW8QkyBGIOxWxG1iGYXvYwmkBIooTXo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719856093; c=relaxed/simple; bh=vClrN8Cgz91Pyp8b4riGZaG1H0hvRxtBooe+ewQkcqs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s+cgbsFc6tNr0mLB0JPXj+q0vj7EkkLi4IJE7RGo4rcRZBKcZUOQkU6z7+4r2OIV9bPubrpyeLgQ6Q7BLXwf8copWZZWqItPZ5+4i0MBjIkFLdbEfx0VtkSBQpS05p09aDJSiGlWhWv87CVVtNBe4z552PnAA54Ao15UYazSGtU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pRBHaRTd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pRBHaRTd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2E24C4AF0A; Mon, 1 Jul 2024 17:48:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719856093; bh=vClrN8Cgz91Pyp8b4riGZaG1H0hvRxtBooe+ewQkcqs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pRBHaRTdyqI4Pp5Y/yc6w73ARTYOtRfRkHODvDLacSQU8DXg5IqqKNeCjQ7n3Xa90 DjItfOERvdhm8d/MkL4MSeAMMQcDdOQxm7hm/WOXwcVfHgtqOTPyQBoI6i67kDcfcU J66uRbX6RQkj/pBFD6TczR+Wrq1n7UctUssaf4OkwPZTCkQlYw5zoELi5QhR/UV9DN cSLvU5VKtPLiY9k2sCIOpUS8SgQEujAZK5tNUPNR8+5ArPiTnggUIQK840hF9eiLdP 5lZRbPWN2Xya4e8wyFHc9vKc8P/6iB4bMQMonqZ+wLAvsvG6ZbB7ExvCwgWwPEKbIs S7qt8NJMlML9A== From: Andrii Nakryiko To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, adobriyan@gmail.com, Andrii Nakryiko , Arnd Bergmann , Stephen Rothwell Subject: [PATCH v2 2/2] fs/procfs: improve PROCMAP_QUERY's compat mode handling Date: Mon, 1 Jul 2024 10:48:05 -0700 Message-ID: <20240701174805.1897344-2-andrii@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240701174805.1897344-1-andrii@kernel.org> References: <20240701174805.1897344-1-andrii@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Kernel provides compat_ptr_ioctl() wrapper to sanitize pointers for 32-bit processes on 64-bit host architectures. Given procfs_procmap_ioctl() always expects pointer argument, this is exactly what we need. This has any effect only on 32-bit processes on s390 architecture. Suggested-by: Arnd Bergmann Fixes: 3757be498749 ("fs/procfs: implement efficient VMA querying API for /proc//maps") Signed-off-by: Andrii Nakryiko --- fs/proc/task_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 3f1d0d2f78fe..b7bb4d04e962 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -637,7 +637,7 @@ const struct file_operations proc_pid_maps_operations = { .llseek = seq_lseek, .release = proc_map_release, .unlocked_ioctl = procfs_procmap_ioctl, - .compat_ioctl = procfs_procmap_ioctl, + .compat_ioctl = compat_ptr_ioctl, }; /*