From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9F1971C54BB for ; Fri, 6 Dec 2024 20:50:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733518215; cv=none; b=HliD2YdzJsdSaXyqIVlTKVKzmWMduLn+/ZlhkJUIS/TFapuBSLJTPnjsf0eH2fxjGoDHEUMjAlsIQO4onCjaFD/+ntKEx9ibH3i4CitRUhGR4uM9u5vzteY4rXByJA2NUWwk86JVUAku5qXBAPc3+emsjH4Mz2D1/EQhRK3smTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733518215; c=relaxed/simple; bh=lG6UScKygXE0DZKpjusrU5YBmeakALe/kqRQf0bpyjc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mI5Nzo41o6JsAmxGsUZbc0rAUcYCv1ttedt492RFTcBBpScPnf5+4n12+3KDUAqEcMsPlTZW6GvsDs487Jc8HylY97qvrI5vEDfNcS5jVCP5Bm2wb7oDLnqKW7IPFp7T1HkcdgvUDIOKX/hvrhwNQ74wlBojQKhud2UuniytUdM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Y9Ol+2OJ; arc=none smtp.client-ip=209.85.214.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Y9Ol+2OJ" Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-21625b4f978so28705ad.0 for ; Fri, 06 Dec 2024 12:50:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1733518213; x=1734123013; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=kIQnC6QifSuf9C4/nsTfcLNSPKAxynKHyi8fol7mDZo=; b=Y9Ol+2OJ2QZh5Zy4t++b5RtRb4iOzzf3Svy8TMnJjUVYO4yZ3hh6q/gtKAXl1qEzqc GCSMjNHK3MVIPE+62AxyuAqKh/sqZ1ma1tq8xzwnUdfnXdBAlfjWkaYVDu1he+Cld46E v3k5fo7SD4KlcuSTglTwAnWfSrwy1FPhUdGj+XwXw3jwN0uE+PteNbRnULs6Ebt0F8nr hF92tP+q9RhLDudJEDynWQ60rNxFpK9kEoSKqf1wr0+gHtPvrA00G/wvCKodvY26v56/ gDo5mmcWVx/6anARekCQXD9o1qAL0QC8F6vYM/2SKXvXvbaeISE4xpZEgpqKIZ7Z64Ru tsXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733518213; x=1734123013; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=kIQnC6QifSuf9C4/nsTfcLNSPKAxynKHyi8fol7mDZo=; b=mukKHmxraYiAEJ/VIx0ybmZ6nyDapzL3YpaTawVlCT86pkrQGxHrcgxPM9cefprETN /ZE3kilIuEcMMAEdWyW5Clkjs9LzUrUCqpTTV1wPn/BnUR5KdQAYy5/T7lrx0ED8rNju i9e5o+eKnWOPNRE5EOEmcnbzBsOBqMKLgbZQQ1bFOUIX/Y5IdN8H2AJsC+TNZkKFQuRW XQpcWA09wjL8A3fD80pieK09WgyV5vf6qWyouu7C6OMoULs3ORzbk+3mJ5SaUlx33xi4 O02YlPifKe6K0Y0mcvMVN4HkzcZy0iCVPtkZNsLTGnHUK9tW6aYcJGSKT/BITKx2dLDP P1uw== X-Forwarded-Encrypted: i=1; AJvYcCVV9uSX8g7+Ijf9hEfvLke9ICqBTBLpCteDHXZMTzWWxMwoxHPqo+8PSkXY2Dc9c10a2LSgL8gDBhSebW4=@vger.kernel.org X-Gm-Message-State: AOJu0YxP0ruZXGvX40+j93aOAr3aLWSQ4giyfg6YORSQyx7Yj5hfOBRi Y9ypTsQk0+6xR0rDP/QM/yugOjHuGjrpAUKfDjrq4SLROTXMQUP1kt8zx1sMhw== X-Gm-Gg: ASbGnctkgy/ccMZSU80kZPlO9CH316KkddoUTYkLyxaX2Yeb1wWny/q+IUmOsl2Uwyi Nj2EQLGms0HKTEGUjfxTRRd9vbNOsFRB1uCojes6RFDTmIhIQNyeJyqmp8NHxGpgvJwXgORzb25 7xP9wCa2XfMB2x8Jao6eh/0kQJcGgQZYzGwbQBr93OJcLgYSmBIhX/rKoHDTxuE4nS+axwUCb3E DAVdwf+TuaBdO1kglGPw0R2YnxXhB21MIvLa6/ZxtmFDoF1qg== X-Google-Smtp-Source: AGHT+IE11QsSYdu5EzfTjQLwDvWU8Ay7LIt+L9MNUYsryjf+ALBnUiR7v52/e5aef5B1j//XzPS0RA== X-Received: by 2002:a17:903:174d:b0:215:a3e9:88cc with SMTP id d9443c01a7336-2162ad6a09emr331635ad.3.1733518212757; Fri, 06 Dec 2024 12:50:12 -0800 (PST) Received: from google.com ([2620:15c:2d:3:7caa:6c4:e72a:a87d]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2162c062f40sm35715ad.90.2024.12.06.12.50.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 12:50:12 -0800 (PST) Date: Fri, 6 Dec 2024 12:50:08 -0800 From: Isaac Manjarres To: Kalesh Singh Cc: Andrew Morton , Jeff Layton , Chuck Lever , Alexander Aring , "Liam R. Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Shuah Khan , kernel-team@android.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org, Suren Baghdasaryan , John Stultz Subject: Re: [RFC PATCH v1 1/2] mm/memfd: Add support for F_SEAL_FUTURE_EXEC to memfd Message-ID: References: <20241206010930.3871336-1-isaacmanjarres@google.com> <20241206010930.3871336-2-isaacmanjarres@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Fri, Dec 06, 2024 at 09:49:35AM -0800, Kalesh Singh wrote: > On Thu, Dec 5, 2024 at 5:09 PM Isaac J. Manjarres > wrote: > > --- a/mm/mmap.c > > +++ b/mm/mmap.c > > @@ -375,6 +375,17 @@ unsigned long do_mmap(struct file *file, unsigned long addr, > > if (!file_mmap_ok(file, inode, pgoff, len)) > > return -EOVERFLOW; > > > > + if (is_exec_sealed(seals)) { > > + /* No new executable mappings if the file is exec sealed. */ > > + if (prot & PROT_EXEC) > > + return -EACCES; > > I think this should be -EPERM to be consistent with seal_check_write() > and mmap(2) man page: > > " EPERM The operation was prevented by a file seal; see fcntl(2)." > > Thanks, > Kalesh > Thanks for catching that Kalesh! I agree and will fix this in v2 of the series. Thanks, Isaac