linux-kernel - Re: [PATCH 1/2] signal.7: Clearly describe ucontext kernel dump to userspace

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date: Sun, 9 Jun 2024 19:33:21 +0200
From: Alejandro Colomar <alx@...nel.org>
To: Mark Brown <broonie@...nel.org>
Cc: Dev Jain <dev.jain@....com>, linux-man@...r.kernel.org, 
	mingo@...nel.org, tglx@...utronix.de, mark.rutland@....com, ryan.roberts@....com, 
	suzuki.poulose@....com, Anshuman.Khandual@....com, DeepakKumar.Mishra@....com, 
	AneeshKumar.KizhakeVeetil@....com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] signal.7: Clearly describe ucontext kernel dump to
 userspace

Hi Mark, Dev,

On Fri, Jun 07, 2024 at 04:39:33PM GMT, Mark Brown wrote:
> On Fri, Jun 07, 2024 at 06:01:18PM +0530, Dev Jain wrote:
> 
> >  .I ucontext_t
> > -object that is pointed to by the third argument of the signal handler.)
> > +object that is pointed to by the third argument of the signal handler.
> > +We emphasize on the fact that this object contains context information
> 
> s/We emphasize on the fact that/Note that/
> 
> feels more idiomatic.

Even more idiomatic is to jump straight to the point, without noting it.
If it weren't notable, we wouldn't say it.  :)

> 
> > +of the thread, present before jumping into the handler; the set of
> > +blocked signals for the current thread would be updated from struct
> 
> s/would/will/
> 
> > +sigaction only after
> > +.I ucontext_t
> > +has been dumped to userspace. This semantically makes sense since the

Please use semantic newlines.  See man-pages:

$ MANWIDTH=72 man man-pages | sed -n '/Use semantic newlines/,/^$/p'
   Use semantic newlines
     In the source of a manual page, new sentences should be started on
     new lines, long sentences should be split  into  lines  at  clause
     breaks  (commas,  semicolons, colons, and so on), and long clauses
     should be split at phrase boundaries.  This convention,  sometimes
     known as "semantic newlines", makes it easier to see the effect of
     patches, which often operate at the level of individual sentences,
     clauses, or phrases.

> > +context for which the signals have been blocked, remains only during
> > +execution of the handler.)
> 
> I'd drop the "this semantically makes sense" and reword the last bit to
> be something like "The ucontext reflects the state at the time the
> signal is delivered rather than in the handler" for idiom reasons.

Thank you both.

Have a lovely day!
Alex


-- 
<https://www.alejandro-colomar.es/>

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)