linux-kernel - Re: [BUG] ptraced process waiting on syscall may return kernel internal errnos

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Message-Id: <20070614000243.1C5784D059F@magilla.localdomain>
Date:	Wed, 13 Jun 2007 17:02:43 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Oleg Nesterov <oleg@...sign.ru>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Satoru Takeuchi <takeuchi_satoru@...fujitsu.com>
Subject: Re: [BUG] ptraced process waiting on syscall may return kernel
	internal errnos

> btw, another interesting grep is to see how tweak TIF_SIGPENDING by
> hand ... there's some scary bits in the tty code too...

All I see there are the calls just added recently by Oleg, which are
correct and necessary to fix a bug.  Wrapping it in something less magical
might be nice.  It is the right thing to do in any place that is
introducing an -ERESTART* error code without having just checked signal_pending.


Thanks,
Roland
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