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From: Richard Weinberger <richard@nod.at>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: viro@zeniv.linux.org.uk, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH][Resend v2] Fix infinite loop in search_binary_handler()
Date: Mon, 4 Jul 2011 13:57:43 +0200	[thread overview]
Message-ID: <201107041357.43481.richard@nod.at> (raw)
In-Reply-To: <201107042051.HEB57830.OJFtMLFSOHFVQO@I-love.SAKURA.ne.jp>

Am Montag 04 Juli 2011, 13:51:55 schrieb Tetsuo Handa:
> Richard Weinberger wrote:
> > Running a x86_64 kernel without ia32 emulation and a x86 user land
> > triggers this issue.
> 
> Executing /sbin/modprobe for x86_32 on an x86_64 kernel without x86_32
> support?

Yep.

> Anyway, request_module() calls __request_module() but
> __request_module() stops at MAX_KMOD_CONCURRENT levels of nesting.
> So, I think "infinite loop" cannot happen.

Booting a x86_64 UML kernel with x86_32 user land triggers this issue.
I always wondered why the UML kernel hangs an consumes 100% CPU.

Thanks,
//richard

  reply	other threads:[~2011-07-04 11:57 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-04 11:30 [PATCH][Resend v2] Fix infinite loop in search_binary_handler() Richard Weinberger
2011-07-04 11:51 ` Tetsuo Handa
2011-07-04 11:57   ` Richard Weinberger [this message]
2011-07-04 12:10     ` Tetsuo Handa
2011-07-04 12:20       ` Richard Weinberger
2011-07-04 14:42         ` Tetsuo Handa
2011-07-04 14:59           ` Richard Weinberger
2011-07-04 15:07             ` Richard Weinberger
2011-07-04 22:03               ` Tetsuo Handa
2011-07-04 22:17                 ` Richard Weinberger
2011-07-05  1:24                   ` Tetsuo Handa
2011-07-05  9:55                     ` Richard Weinberger
2011-07-05 12:02                       ` Tetsuo Handa
2011-07-05 12:21                         ` Richard Weinberger
2011-07-06 11:28                           ` Tetsuo Handa
2011-07-06 11:36                             ` Richard Weinberger
2011-07-06 20:21                             ` Andrew Morton
2011-07-07  4:04                               ` Tetsuo Handa

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