From: Al Viro <viro@zeniv.linux.org.uk>
To: Matthew Wilcox <willy@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Jordy Zomer <jordy@pwning.systems>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
"Ahmed S. Darwish" <a.darwish@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Eric Biggers <ebiggers@google.com>
Subject: Re: [PATCH] fs: make d_path-like functions all have unsigned size
Date: Tue, 27 Jul 2021 15:17:09 +0000 [thread overview]
Message-ID: <YQAjdSPCwrnoc+YO@zeniv-ca.linux.org.uk> (raw)
In-Reply-To: <YQAhQ2dYWCmnFMwM@casper.infradead.org>
On Tue, Jul 27, 2021 at 04:07:47PM +0100, Matthew Wilcox wrote:
> umm ... what if someone passes in -ENOMEM as buflen? Not saying we
> have such a path right now, but I could imagine it happening.
>
> if (unlikely(buflen < 0))
> return ERR_PTR(buflen);
> if (unlikely(buflen > 0x8000)) {
> buf += buflen - 0x8000;
> buflen = 0x8000;
> }
Not really. You don't want ERR_PTR() of random negative numbers to start
flying around...
next prev parent reply other threads:[~2021-07-27 15:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 10:36 [PATCH] fs: make d_path-like functions all have unsigned size Greg Kroah-Hartman
2021-07-27 10:49 ` Ahmed S. Darwish
2021-07-27 10:56 ` Greg Kroah-Hartman
2021-07-27 11:19 ` Matthew Wilcox
2021-07-27 11:51 ` Greg Kroah-Hartman
2021-07-27 14:50 ` Al Viro
2021-07-27 15:07 ` Matthew Wilcox
2021-07-27 15:17 ` Al Viro [this message]
2021-07-27 15:31 ` Matthew Wilcox
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YQAjdSPCwrnoc+YO@zeniv-ca.linux.org.uk \
--to=viro@zeniv.linux.org.uk \
--cc=a.darwish@linutronix.de \
--cc=andriy.shevchenko@linux.intel.com \
--cc=ebiggers@google.com \
--cc=gregkh@linuxfoundation.org \
--cc=jordy@pwning.systems \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).