From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sat, 9 Dec 2006 23:45:28 +0000 (+1100)
Subject: [CRYPTO] all: Check for usage in hard IRQ context
X-Git-Tag: v2.6.21-rc1~83^2~65^2~2^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb469840b8c34b2f95b40a64b271f245cc1075b7;p=pandora-kernel.git

[CRYPTO] all: Check for usage in hard IRQ context

Using blkcipher/hash crypto operations in hard IRQ context can lead
to random memory corruption due to the reuse of kmap_atomic slots.
Since crypto operations were never meant to be used in hard IRQ
contexts, this patch checks for such usage and returns an error
before kmap_atomic is performed.

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