From: Al Viro <viro@zeniv.linux.org.uk>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Miklos Szeredi <mszeredi@redhat.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v2 01/18] vfs: add miscattr ops
Date: Wed, 24 Mar 2021 12:26:19 +0000 [thread overview]
Message-ID: <YFsv63/2auZZs3ec@zeniv-ca.linux.org.uk> (raw)
In-Reply-To: <CAJfpegvy-bSoorAnPVRUxGjR5s10sJp3qRS0K-O91PcDvLSEPg@mail.gmail.com>
On Wed, Mar 24, 2021 at 09:45:02AM +0100, Miklos Szeredi wrote:
> On Wed, Mar 24, 2021 at 6:03 AM Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> > On Mon, Mar 22, 2021 at 03:48:59PM +0100, Miklos Szeredi wrote:
> >
> > minor nit: copy_fsxattr_{to,from}_user() might be better.
> >
> > > +int fsxattr_copy_to_user(const struct miscattr *ma, struct fsxattr __user *ufa)
> > > +{
> > > + struct fsxattr fa = {
> > > + .fsx_xflags = ma->fsx_xflags,
> > > + .fsx_extsize = ma->fsx_extsize,
> > > + .fsx_nextents = ma->fsx_nextents,
> > > + .fsx_projid = ma->fsx_projid,
> > > + .fsx_cowextsize = ma->fsx_cowextsize,
> > > + };
> >
> > That wants a comment along the lines of "guaranteed to be gap-free",
> > since otherwise you'd need memset() to avoid an infoleak.
>
> Isn't structure initialization supposed to zero everything not
> explicitly initialized?
All fields, but not the padding...
> The one in io_uring() seems wrong also, as a beast needing
> file_dentry() should never get out of overlayfs and into io_uring:
That one would be wrong in overlayfs as well - we'd better had the
same names in all layers...
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -9297,7 +9297,7 @@ static void __io_uring_show_fdinfo(struct
> io_ring_ctx *ctx, struct seq_file *m)
> struct file *f = *io_fixed_file_slot(ctx->file_data, i);
>
> if (f)
> - seq_printf(m, "%5u: %s\n", i, file_dentry(f)->d_iname);
> + seq_printf(m, "%5u: %pD\n", i, f);
> else
> seq_printf(m, "%5u: <none>\n", i);
> }
>
>
> Thanks,
> Miklos
next prev parent reply other threads:[~2021-03-24 12:29 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 14:48 [PATCH v2 00/18] new kAPI for FS_IOC_[GS]ETFLAGS/FS_IOC_FS[GS]ETXATTR Miklos Szeredi
2021-03-22 14:48 ` [PATCH v2 01/18] vfs: add miscattr ops Miklos Szeredi
2021-03-22 22:33 ` Darrick J. Wong
2021-03-23 5:21 ` Amir Goldstein
2021-03-23 11:22 ` David Sterba
2021-03-24 8:06 ` Christian Brauner
2021-03-24 5:02 ` Al Viro
2021-03-24 8:45 ` Miklos Szeredi
2021-03-24 12:26 ` Al Viro [this message]
2021-03-24 13:45 ` Miklos Szeredi
2021-03-24 8:21 ` Christian Brauner
2021-03-22 14:49 ` [PATCH v2 02/18] ecryptfs: stack " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 03/18] ovl: " Miklos Szeredi
2021-03-24 5:09 ` Al Viro
2021-03-24 5:18 ` Al Viro
2021-03-22 14:49 ` [PATCH v2 04/18] btrfs: convert to miscattr Miklos Szeredi
2021-03-23 11:41 ` David Sterba
2021-03-22 14:49 ` [PATCH v2 05/18] ext2: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 06/18] ext4: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 07/18] f2fs: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 08/18] gfs2: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 09/18] orangefs: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 10/18] xfs: " Miklos Szeredi
2021-03-22 22:51 ` Darrick J. Wong
2021-03-22 14:49 ` [PATCH v2 11/18] efivars: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 12/18] hfsplus: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 13/18] jfs: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 14/18] nilfs2: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 15/18] ocfs2: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 16/18] reiserfs: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 17/18] ubifs: " Miklos Szeredi
2021-03-22 14:49 ` [PATCH v2 18/18] vfs: remove unused ioctl helpers Miklos Szeredi
2021-03-22 22:51 ` Darrick J. Wong
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