From: Aravind Srinivasan <raa.aars@gmail.com>
Date: Thu, 2 Apr 2009 23:58:59 +0000 (-0700)
Subject: relay: fix for possible loss/corruption of produced subbufs
X-Git-Tag: v2.6.30-rc1~291
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c53d9109f077900e140edb8b766132ad93b81cc;p=pandora-kernel.git

relay: fix for possible loss/corruption of produced subbufs

Fix possible loss/corruption of produced subbufs in
relay_subbufs_consumed().

When buf->subbufs_produced wraps around after UINT_MAX and
buf->subbufs_consumed is still < UINT_MAX, the condition

	if (buf->subbufs_consumed > buf->subbufs_produced)

will be true even for certain valid values of subbufs_consumed.  This may
lead to loss or corruption of produced subbufs.

Signed-off-by: Aravind Srinivasan <raa.aars@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Tom Zanussi <zanussi@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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