From: Justin He <Justin.He@arm.com>
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>,
Eric Biggers <ebiggers@google.com>,
"Ahmed S. Darwish" <a.darwish@linutronix.de>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Christoph Hellwig <hch@infradead.org>, nd <nd@arm.com>,
Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Jonathan Corbet <corbet@lwn.net>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: RE: [PATCH v5 4/4] lib/test_printf.c: add test cases for '%pD'
Date: Wed, 23 Jun 2021 03:27:54 +0000 [thread overview]
Message-ID: <AM6PR08MB43764CC4C5CE337239ECA1B7F7089@AM6PR08MB4376.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <03f59e85-bba3-2e2c-ebaa-48daa93d6fec@rasmusvillemoes.dk>
Hi Rasmus
> -----Original Message-----
> From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> Sent: Wednesday, June 23, 2021 4:52 AM
> To: Justin He <Justin.He@arm.com>; Petr Mladek <pmladek@suse.com>; Steven
> Rostedt <rostedt@goodmis.org>; Sergey Senozhatsky
> <senozhatsky@chromium.org>; Andy Shevchenko
> <andriy.shevchenko@linux.intel.com>; Jonathan Corbet <corbet@lwn.net>;
> Alexander Viro <viro@zeniv.linux.org.uk>; Linus Torvalds <torvalds@linux-
> foundation.org>
> Cc: Peter Zijlstra (Intel) <peterz@infradead.org>; Eric Biggers
> <ebiggers@google.com>; Ahmed S. Darwish <a.darwish@linutronix.de>; linux-
> doc@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> fsdevel@vger.kernel.org; Matthew Wilcox <willy@infradead.org>; Christoph
> Hellwig <hch@infradead.org>; nd <nd@arm.com>
> Subject: Re: [PATCH v5 4/4] lib/test_printf.c: add test cases for '%pD'
>
> On 22/06/2021 16.06, Jia He wrote:
> > After the behaviour of specifier '%pD' is changed to print the full path
> > of struct file, the related test cases are also updated.
> >
> > Given the full path string of '%pD' is prepended from the end of the
> scratch
> > buffer, the check of "wrote beyond the nul-terminator" should be skipped
> > for '%pD'.
> >
> > Parameterize the new using_scratch_space in __test, do_test to skip the
> > test case mentioned above,
>
> I actually prefer the first suggestion of just having a file-global bool.
Yes, this is my previous proposal, but seems it is not satisfying 😉.
--
Cheers,
Justin (Jia He)
>
> If and when we get other checks that need to be done selectively [e.g.
> "snprintf into a too short buffer produces a prefix of the full string",
> which also came up during this discussion but was ultimately kept]
> depending on the %<whatever> being exercised, we can add a "u32 nocheck"
> with a bunch of bits saying what to elide.
>
> Not insisting either way, just my $0.02.
>
next prev parent reply other threads:[~2021-06-23 3:28 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 14:06 [PATCH v5 0/4] make '%pD' print the full path of file Jia He
2021-06-22 14:06 ` [PATCH v5 1/4] fs: introduce helper d_path_unsafe() Jia He
2021-06-22 14:36 ` Andy Shevchenko
2021-06-23 2:02 ` Justin He
2021-06-23 9:07 ` Andy Shevchenko
2021-06-24 2:35 ` Justin He
2021-06-24 9:26 ` Petr Mladek
2021-06-24 10:48 ` Andy Shevchenko
2021-06-22 14:06 ` [PATCH v5 2/4] lib/vsprintf.c: make '%pD' print the full path of file Jia He
2021-06-22 14:39 ` Andy Shevchenko
2021-06-23 3:14 ` Justin He
2021-06-24 8:46 ` Petr Mladek
2021-06-24 9:01 ` Justin He
2021-06-22 14:06 ` [PATCH v5 3/4] lib/test_printf.c: split write-beyond-buffer check in two Jia He
2021-06-22 14:06 ` [PATCH v5 4/4] lib/test_printf.c: add test cases for '%pD' Jia He
2021-06-22 14:41 ` Andy Shevchenko
2021-06-22 20:51 ` Rasmus Villemoes
2021-06-23 3:27 ` Justin He [this message]
2021-06-22 14:43 ` [PATCH v5 0/4] make '%pD' print the full path of file Andy Shevchenko
2021-06-23 4:13 ` Justin He
2021-06-23 9:12 ` Andy Shevchenko
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