From: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
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Andrey Vagin <avagin-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 6/7] fcntl: Don't use ambiguous SIG_POLL si_codes
Date: Thu, 20 Jul 2017 18:16:04 +0200 [thread overview]
Message-ID: <20170720161603.GA14430@redhat.com> (raw)
In-Reply-To: <20170718140651.15973-6-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
On 07/18, Eric W. Biederman wrote:
>
> - BUG_ON((reason & __SI_MASK) != __SI_POLL);
> + BUG_ON((reason < POLL_IN) || (reason > NSIGPOLL));
^^^^^^^^^^^^^^^^^
looks obviously wrong? Say, POLL_IN is obviously > NSIGPOLL == 6.
Probably you meant
BUG_ON((reason < POLL_IN) || (reason - POLL_IN > NSIGPOLL)
?
but this contradicts with the next line:
> if (reason - POLL_IN >= NSIGPOLL)
> si.si_band = ~0L;
confused...
Oleg.
next prev parent reply other threads:[~2017-07-20 16:16 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87o9shg7t7.fsf_-_@xmission.com>
[not found] ` <87o9shg7t7.fsf_-_-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-18 14:06 ` [PATCH 1/7] signal/alpha: Document a conflict with SI_USER for SIGTRAP Eric W. Biederman
2017-07-18 14:06 ` [PATCH 2/7] signal/ia64: Document a conflict with SI_USER with SIGFPE Eric W. Biederman
2017-07-18 14:06 ` [PATCH 3/7] signal/sparc: " Eric W. Biederman
2017-07-18 14:06 ` [PATCH 4/7] signal/mips: " Eric W. Biederman
2017-07-18 14:06 ` [PATCH 5/7] signal/testing: Don't look for __SI_FAULT in userspace Eric W. Biederman
2017-07-18 14:06 ` [PATCH 6/7] fcntl: Don't use ambiguous SIG_POLL si_codes Eric W. Biederman
[not found] ` <20170718140651.15973-6-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-20 16:16 ` Oleg Nesterov [this message]
[not found] ` <20170720161603.GA14430-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-21 2:33 ` Eric W. Biederman
2017-07-18 14:06 ` [PATCH 7/7] signal: Remove kernel interal si_code magic Eric W. Biederman
[not found] ` <20170718140651.15973-7-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-18 16:57 ` Linus Torvalds
[not found] ` <CA+55aFyKsmf+BpYjcH30MGpHTDJ=zgYPx6kwyEB9CXXFxj_xsw@mail.gmail.com>
[not found] ` <CA+55aFyKsmf+BpYjcH30MGpHTDJ=zgYPx6kwyEB9CXXFxj_xsw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-07-18 17:27 ` Eric W. Biederman
[not found] ` <878tjlbqpt.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-22 20:25 ` Simplfying copy_siginfo_to_user Eric W. Biederman
[not found] ` <8760ek5ics.fsf_-_-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-24 17:43 ` Linus Torvalds
[not found] ` <CA+55aFyH5W2doo9vxXta_-pXfNXqQ19d7z48k1hmfAot+aJvMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-07-24 19:01 ` Eric W. Biederman
2017-07-25 1:37 ` Al Viro
[not found] ` <20170725013756.GH2063@ZenIV.linux.org.uk>
[not found] ` <20170725013756.GH2063-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2017-07-31 16:37 ` Eric W. Biederman
[not found] ` <20170718140651.15973-1-ebiederm@xmission.com>
[not found] ` <20170718140651.15973-1-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-07-18 18:22 ` [PATCH 1/7] signal/alpha: Document a conflict with SI_USER for SIGTRAP Richard Henderson
[not found] ` <20170718140651.15973-4-ebiederm@xmission.com>
[not found] ` <20170718140651.15973-4-ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-08-07 16:18 ` [PATCH 4/7] signal/mips: Document a conflict with SI_USER with SIGFPE Maciej W. Rozycki
[not found] ` <alpine.DEB.2.00.1708071706290.17596@tp.orcam.me.uk>
[not found] ` <CA+55aFx3ss90b4x2bo4si80kQUjMVL1zUX3Oxvu04OE14nUtFw@mail.gmail.com>
[not found] ` <CA+55aFx3ss90b4x2bo4si80kQUjMVL1zUX3Oxvu04OE14nUtFw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-07 19:55 ` Ralf Baechle
[not found] ` <alpine.DEB.2.00.1708071706290.17596-AURtyoD2VtPP6B53oEZunQ@public.gmane.org>
2017-08-07 17:41 ` Linus Torvalds
2017-08-08 15:29 ` Eric W. Biederman
[not found] ` <87mv7agjsh.fsf@xmission.com>
[not found] ` <87mv7agjsh.fsf-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
2017-08-08 23:19 ` Maciej W. Rozycki
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