crypto: qce - fix uaf on qce_ahash_register_one

Pointer base points to sub field of tmpl, it
is dereferenced after tmpl is freed. Fix
this by accessing base before free tmpl.

Fixes: ec8f5d8f ("crypto: qce - Qualcomm crypto engine driver")
Signed-off-by: Chengfeng Ye <cyeaa@connect.ust.hk>
Acked-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
index 8e6fcf2c21cc0a8b1e532d549927a2468276c864..59159f5e64e522df14f7643f64e1dddfee51f464 100644 (file)
--- a/drivers/crypto/qce/sha.c
+++ b/drivers/crypto/qce/sha.c
@@ -498,8 +498,8 @@ static int qce_ahash_register_one(const struct qce_ahash_def *def,
 
        ret = crypto_register_ahash(alg);
        if (ret) {
-               kfree(tmpl);
                dev_err(qce->dev, "%s registration failed\n", base->cra_name);
+               kfree(tmpl);
                return ret;
        }