From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Wed, 5 Nov 2008 22:21:16 +0000 (+0100)
Subject: [JFFS2] fix race condition in jffs2_lzo_compress()
X-Git-Tag: v2.6.28-rc4~33^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc8a0843a435b2c0891e7eaea64faaf1ebec9b11;p=pandora-kernel.git

[JFFS2] fix race condition in jffs2_lzo_compress()

deflate_mutex protects the globals lzo_mem and lzo_compress_buf.  However,
jffs2_lzo_compress() unlocks deflate_mutex _before_ it has copied out the
compressed data from lzo_compress_buf.  Correct this by moving the mutex
unlock after the copy.

In addition, document what deflate_mutex actually protects.

Cc: stable@kernel.org
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

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