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From: Antonio SJ Musumeci <trapexit@spawn.link>
To: Miklos Szeredi <miklos@szeredi.hu>,
	Alessio Balsini <balsini@android.com>
Cc: Akilesh Kailash <akailash@google.com>,
	Amir Goldstein <amir73il@gmail.com>,
	David Anderson <dvander@google.com>,
	Giuseppe Scrivano <gscrivan@redhat.com>,
	Jann Horn <jannh@google.com>, Jens Axboe <axboe@kernel.dk>,
	Martijn Coenen <maco@android.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Lawrence <paullawrence@google.com>,
	Stefano Duo <stefanoduo@google.com>,
	Zimuzo Ezeozue <zezeozue@google.com>,
	fuse-devel <fuse-devel@lists.sourceforge.net>,
	kernel-team <kernel-team@android.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH V9 2/4] fuse: Trace daemon creds
Date: Wed, 30 Sep 2020 15:16:20 -0400
Message-ID: <a5d94f04-a980-ee3f-bd8d-42df3a859777@spawn.link> (raw)
In-Reply-To: <CAJfpegvvf4MfO4Jw5A=TJJfrxN_1xFTmwBJ2bb9UfzYBgkhzzQ@mail.gmail.com>

On 9/30/2020 2:45 PM, Miklos Szeredi wrote:
> On Thu, Sep 24, 2020 at 3:13 PM Alessio Balsini <balsini@android.com> wrote:
>> Add a reference to the FUSE daemon credentials, so that they can be used to
>> temporarily raise the user credentials when accessing lower file system
>> files in passthrough.
> Hmm, I think it would be better to store the creds of the ioctl()
> caller together with the open file.   The mounter may deliberately
> have different privileges from the process doing the actual I/O.
>
> Thanks,
> Miklos


In my usecase I'm changing euid/egid of the thread to whichever the 
uid/gid was passed to the server which is otherwise running as root.


  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-24 13:13 [PATCH V9 0/4] fuse: Add support for passthrough read/write Alessio Balsini
2020-09-24 13:13 ` [PATCH V9 1/4] fuse: Definitions and ioctl() for passthrough Alessio Balsini
2020-09-29 14:37   ` Alessio Balsini
2020-09-30 15:44   ` Miklos Szeredi
2020-10-22 16:12     ` Alessio Balsini
2020-09-24 13:13 ` [PATCH V9 2/4] fuse: Trace daemon creds Alessio Balsini
2020-09-30 18:45   ` Miklos Szeredi
2020-09-30 19:16     ` Antonio SJ Musumeci [this message]
2020-10-22 16:14       ` Alessio Balsini
2020-09-24 13:13 ` [PATCH V9 3/4] fuse: Introduce synchronous read and write for passthrough Alessio Balsini
2020-09-30 18:50   ` Miklos Szeredi
2020-10-22 16:17     ` Alessio Balsini
2020-09-24 13:13 ` [PATCH V9 4/4] fuse: Handle asynchronous read and write in passthrough Alessio Balsini
2020-09-30 18:54   ` Miklos Szeredi
2020-10-22 16:38     ` Alessio Balsini
2020-09-30 15:33 ` [PATCH V9 0/4] fuse: Add support for passthrough read/write Miklos Szeredi
2020-10-02 13:38   ` Alessio Balsini
2020-10-21 15:39     ` Alessio Balsini

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