From: Jan Kara <jack@suse.cz>
Date: Thu, 19 Aug 2010 21:13:33 +0000 (-0700)
Subject: lib/radix-tree.c: fix overflow in radix_tree_range_tag_if_tagged()
X-Git-Tag: v2.6.36-rc2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d5ed3a4af77b851b6271ad3d9abc4c57fa3ce0f5;p=pandora-kernel.git

lib/radix-tree.c: fix overflow in radix_tree_range_tag_if_tagged()

When radix_tree_maxindex() is ~0UL, it can happen that scanning overflows
index and tree traversal code goes astray reading memory until it hits
unreadable memory.  Check for overflow and exit in that case.

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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