[patch] crypto: nx - off by one bug in nx_of_update_msc()

[Dan Carpenter]

The props->ap[] array is defined like this:

        struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3];

So we can see that if msc->fc and msc->mode are == to NX_MAX_FC or
NX_MAX_MODE then we're off by one.

Fixes: ae0222b7289d ('powerpc/crypto: nx driver code supporting nx encryption')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/crypto/nx/nx.c b/drivers/crypto/nx/nx.c
index 0794f1c..42f0f22 100644
--- a/drivers/crypto/nx/nx.c
+++ b/drivers/crypto/nx/nx.c
@@ -392,7 +392,7 @@ static void nx_of_update_msc(struct device   *dev,
                     ((bytes_so_far + sizeof(struct msc_triplet)) <= lenp) &&
                     i < msc->triplets;
                     i++) {
-                       if (msc->fc > NX_MAX_FC || msc->mode > NX_MAX_MODE) {
+                       if (msc->fc >= NX_MAX_FC || msc->mode >= NX_MAX_MODE) {
                                dev_err(dev, "unknown function code/mode "
                                        "combo: %d/%d (ignored)\n", msc->fc,
                                        msc->mode);
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