crypto: caam - fix use-after-free KASAN issue for SKCIPHER algorithms

[linux-2.6-microblaze.git] / drivers / crypto / caam / caamalg.c

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index b7bb7c3..86be876 100644 (file)
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -995,10 +995,12 @@ static void skcipher_crypt_done(struct device *jrdev, u32 *desc, u32 err,
        struct caam_drv_private_jr *jrp = dev_get_drvdata(jrdev);
        int ivsize = crypto_skcipher_ivsize(skcipher);
        int ecode = 0;
+       bool has_bklog;
 
        dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
 
        edesc = rctx->edesc;
+       has_bklog = edesc->bklog;
        if (err)
                ecode = caam_jr_strstatus(jrdev, err);
 
@@ -1028,7 +1030,7 @@ static void skcipher_crypt_done(struct device *jrdev, u32 *desc, u32 err,
         * If no backlog flag, the completion of the request is done
         * by CAAM, not crypto engine.
         */
-       if (!edesc->bklog)
+       if (!has_bklog)
                skcipher_request_complete(req, ecode);
        else
                crypto_finalize_skcipher_request(jrp->engine, req, ecode);