From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 13 Jan 2009 00:26:18 +0000 (+1100)
Subject: crypto: authenc - Fix zero-length IV crash
X-Git-Tag: v2.6.29-rc3~14^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29b37f42127f7da511560a40ea74f5047da40c13;p=pandora-kernel.git

crypto: authenc - Fix zero-length IV crash

As it is if an algorithm with a zero-length IV is used (e.g.,
NULL encryption) with authenc, authenc may generate an SG entry
of length zero, which will trigger a BUG check in the hash layer.

This patch fixes it by skipping the IV SG generation if the IV
size is zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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