From: Andrew Morton <akpm@osdl.org>
Date: Wed, 11 Oct 2006 08:21:46 +0000 (-0700)
Subject: [PATCH] grow_buffers() infinite loop fix
X-Git-Tag: v2.6.19-rc2~81
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5657933863f43cc6bb76a54d659303dafaa9e58;p=pandora-kernel.git

[PATCH] grow_buffers() infinite loop fix

If grow_buffers() is for some reason passed a block number which wants to lie
outside the maximum-addressable pagecache range (PAGE_SIZE * 4G bytes) then it
will accidentally truncate `index' and will then instnatiate a page at the
wrong pagecache offset.  This causes __getblk_slow() to go into an infinite
loop.

This can happen with corrupted disks, or with software errors elsewhere.

Detect that, and handle it.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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