linux-kernel - Re: [REGRESSION][PATCH] mqueue: Ignore the validity of abs_timeout parameter when message can be performed immediately

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Thu, 15 Mar 2012 00:02:47 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Akira Takeuchi <takeuchi.akr@...panasonic.com>,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	Carsten Emde <C.Emde@...dl.org>,
	Manfred Spraul <manfred@...orfullife.com>
Subject: Re: [REGRESSION][PATCH] mqueue: Ignore the validity of abs_timeout
 parameter when message can be performed immediately

B1;2601;0cOn Wed, 14 Mar 2012, Andrew Morton wrote:
> On Fri, 02 Mar 2012 16:42:35 +0900
> Akira Takeuchi <takeuchi.akr@...panasonic.com> wrote:
> > @@ -996,6 +1015,10 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
> >  		if (filp->f_flags & O_NONBLOCK) {
> >  			spin_unlock(&info->lock);
> >  			ret = -EAGAIN;
> > +		} else if (unlikely(timeout_param_error)) {
> > +			spin_unlock(&info->lock);
> > +			ret = timeout_param_error;
> > +			msg_ptr = NULL; /* just for shutting up warning */

Huch? We are not "just" shutting up some warning because the compiler
is yelling at us. No, either we initialize the variable upfront to
NULL or we skip the whole return path by going to fput directly.

Duh, that code is convoluted enough already.

Thanks,

	tglx

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/