public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: Andrew Morton <akpm@linux-foundation.org>
To: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] posix-timers: fix oops in clock_nanosleep() with CLOCK_MONOTONIC_RAW
Date: Tue, 4 Aug 2009 00:57:53 -0700	[thread overview]
Message-ID: <20090804005753.99e21163.akpm@linux-foundation.org> (raw)
In-Reply-To: <4A77E62D.8070803@ct.jp.nec.com>

On Tue, 04 Aug 2009 16:41:33 +0900 Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> wrote:

> Userspace program is like this;
> 
> #include <time.h>
> 
> int main(void)
> {
> 	struct timespec ts;
> 
> 	ts.tv_sec = 1;
> 	ts.tv_nsec = 0;
> 
> 	return clock_nanosleep(4, 0, &ts, NULL);
> }
> 
> and it will cause oops;
> 
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000001

Well that's not very good.

How far back does this go?  posix-timers.c hasn't changed in several
kernel versions.


  reply	other threads:[~2009-08-04  7:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-08-03  2:48 [PATCH] posix-timers: fix oops in clock_nanosleep() with CLOCK_MONOTONIC_RAW Hiroshi Shimamoto
2009-08-04  7:22 ` Andrew Morton
2009-08-04  7:41   ` Hiroshi Shimamoto
2009-08-04  7:57     ` Andrew Morton [this message]
2009-08-04  8:06       ` Hiroshi Shimamoto
2009-08-04  8:21 ` [tip:timers/urgent] posix-timers: Fix " tip-bot for Hiroshi Shimamoto

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20090804005753.99e21163.akpm@linux-foundation.org \
    --to=akpm@linux-foundation.org \
    --cc=h-shimamoto@ct.jp.nec.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=tglx@linutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox