From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 7 Apr 2015 13:27:01 +0000 (+0800)
Subject: crypto: user - Fix crypto_alg_match race
X-Git-Tag: omap-for-v4.1/fixes-rc1~140^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=016baaa1183bb0c5fb2a7de42413bba8a51c1bc8;p=pandora-kernel.git

crypto: user - Fix crypto_alg_match race

The function crypto_alg_match returns an algorithm without taking
any references on it.  This means that the algorithm can be freed
at any time, therefore all users of crypto_alg_match are buggy.

This patch fixes this by taking a reference count on the algorithm
to prevent such races.

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