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From: Andrew Morton <akpm@osdl.org>
To: William Lee Irwin III <wli@holomorphy.com>
Cc: linux-kernel@vger.kernel.org, gregkh@suse.de
Subject: Re: [bugfix] try_to_unmap_cluster() passes out-of-bounds pte to pte_unmap()
Date: Sun, 22 May 2005 15:00:31 -0700	[thread overview]
Message-ID: <20050522150031.7a4058a2.akpm@osdl.org> (raw)
In-Reply-To: <20050522212734.GF2057@holomorphy.com>

William Lee Irwin III <wli@holomorphy.com> wrote:
>
> try_to_unmap_cluster() does:
>          for (pte = pte_offset_map(pmd, address);
>                          address < end; pte++, address += PAGE_SIZE) {
>  		...
>  	}
> 
>  	pte_unmap(pte);
> 
>  It may take a little staring to notice, but pte can actually fall off
>  the end of the pte page in this iteration,

That's about the third place we've had this bug.  Whoever keeps adding it
really should stop.

Thanks.

  reply	other threads:[~2005-05-22 22:01 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-05-16  9:13 2.6.12-rc4-mm2 Andrew Morton
2005-05-16  9:25 ` 2.6.12-rc4-mm2 Russell King
2005-05-16 10:50 ` 2.6.12-rc4-mm2 Danny ter Haar
2005-05-16 11:17   ` 2.6.12-rc4-mm2 Alexey Dobriyan
2005-05-16 11:38     ` 2.6.12-rc4-mm2 Danny ter Haar
2005-05-16 12:15       ` 2.6.12-rc4-mm2 Alexey Dobriyan
2005-05-16 17:11         ` 2.6.12-rc4-mm2 Danny ter Haar
2005-05-16 17:43           ` 2.6.12-rc4-mm2 Alexey Dobriyan
2005-05-16 19:30             ` 2.6.12-rc4-mm2 Danny ter Haar
2005-05-16 12:30 ` 2.6.12-rc4-mm2 Brice Goglin
2005-05-16 17:46 ` 2.6.12-rc4-mm2, alpha and mips broke Jan Dittmer
2005-05-16 20:09   ` Andrew Morton
2005-05-16 19:18 ` 2.6.12-rc4-mm2: proc-pid-smaps.patch broke nommu Adrian Bunk
2005-05-21  2:19   ` Mauricio Lin
2005-05-21  2:39     ` Mauricio Lin
2005-07-21 15:04     ` Adrian Bunk
2005-05-17  9:06 ` 2.6.12-rc4-mm2 Brice Goglin
2005-05-17 16:38   ` 2.6.12-rc4-mm2 Richard Purdie
2005-05-18 22:45     ` 2.6.12-rc4-mm2 Richard Purdie
2005-05-18  7:14 ` 2.6.12-rc4-mm2 Coywolf Qi Hunt
2005-05-18 20:26 ` 2.6.12-rc4-mm2 Alexander Nyberg
2005-05-19 14:59 ` 2.6.12-rc4-mm2 Brice Goglin
2005-05-22 21:27 ` [bugfix] try_to_unmap_cluster() passes out-of-bounds pte to pte_unmap() William Lee Irwin III
2005-05-22 22:00   ` Andrew Morton [this message]
2005-05-24  0:14   ` Andrew Morton
2005-05-24  2:48     ` William Lee Irwin III
2005-05-24  4:38       ` Hugh Dickins
2005-05-24  8:02         ` Nick Piggin
2007-06-27  0:35 ` Problems with fb console [was Re: 2.6.12-rc4-mm2] J.A. Magallón
2007-06-27  0:54   ` Andrew Morton
2007-06-27 14:21     ` H. Peter Anvin
2007-06-27  7:20   ` DervishD

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