From: Kees Cook <keescook@chromium.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>, Al Viro <viro@zeniv.linux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Iurii Zaikin <yzaikin@google.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 8/9] fs: don't allow kernel reads and writes without iter ops
Date: Fri, 26 Jun 2020 14:05:12 -0700 [thread overview]
Message-ID: <202006261403.3E1397040F@keescook> (raw)
In-Reply-To: <20200626135147.GB25039@casper.infradead.org>
On Fri, Jun 26, 2020 at 02:51:47PM +0100, Matthew Wilcox wrote:
> On Fri, Jun 26, 2020 at 09:58:35AM +0200, Christoph Hellwig wrote:
> > +static void warn_unsupported(struct file *file, const char *op)
> > +{
> > + char pathname[128], *path;
> > +
> > + path = file_path(file, pathname, sizeof(pathname));
> > + if (IS_ERR(path))
> > + path = "(unknown)";
> > + pr_warn_ratelimited(
> > + "kernel %s not supported for file %s (pid: %d comm: %.20s)\n",
> > + op, path, current->pid, current->comm);
> > +}
> > +
>
> how about just:
>
> pr_warn_ratelimited(
> "kernel %s not supported for file %pD4 (pid: %d comm: %.20s)\n",
> op, file, current->pid, current->comm);
>
> also, is the pid really that interesting?
Yes, pid matters, especially when there may be many of something running
(e.g. rsync).
--
Kees Cook
next prev parent reply other threads:[~2020-06-26 21:05 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 7:58 [RFC] stop using ->read and ->write for kernel access v2 Christoph Hellwig
2020-06-26 7:58 ` [PATCH 1/9] fs: refactor new_sync_read Christoph Hellwig
2020-06-26 7:58 ` [PATCH 2/9] proc: add a read_iter method to proc proc_ops Christoph Hellwig
2020-06-26 12:06 ` Luis Chamberlain
2020-06-26 13:36 ` Christoph Hellwig
2020-06-26 7:58 ` [PATCH 3/9] seq_file: add seq_read_iter Christoph Hellwig
2020-06-26 7:58 ` [PATCH 5/9] proc: switch over direct seq_read method calls to seq_read_iter Christoph Hellwig
2020-06-26 7:58 ` [PATCH 6/9] sysctl: Call sysctl_head_finish on error Christoph Hellwig
2020-06-26 12:17 ` Luis Chamberlain
2020-06-26 12:27 ` Matthew Wilcox
2020-06-26 7:58 ` [PATCH 7/9] sysctl: Convert to iter interfaces Christoph Hellwig
2020-06-26 7:58 ` [PATCH 8/9] fs: don't allow kernel reads and writes without iter ops Christoph Hellwig
2020-06-26 12:27 ` Luis Chamberlain
2020-06-26 13:37 ` Christoph Hellwig
2020-06-26 13:51 ` Matthew Wilcox
2020-06-26 21:05 ` Kees Cook [this message]
2020-06-27 7:10 ` Christoph Hellwig
2020-06-26 7:58 ` [PATCH 9/9] fs: don't allow splice read/write without explicit ops Christoph Hellwig
2020-06-27 22:15 ` [RFC] stop using ->read and ->write for kernel access v2 Linus Torvalds
2020-06-28 7:20 ` Christoph Hellwig
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