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crypto: algif_hash - wait for crypto_ahash_init() to complete

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commit fe09786178f9df713a4b2dd6b93c0a722346bf5e upstream.

hash_sendmsg/sendpage() need to wait for the completion
of crypto_ahash_init() otherwise it can cause panic.

Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wang, Rui Y 2016-01-27 17:08:37 +08:00 • committed by Greg Kroah-Hartman
parent 6bb06a4fa1
commit 792c6ff0d8
1 changed files with 3 additions and 1 deletions
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4
crypto/algif_hash.c
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@ -54,7 +54,8 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg,
lock_sock(sk);
if (!ctx->more) {
err = crypto_ahash_init(&ctx->req);
err = af_alg_wait_for_completion(crypto_ahash_init(&ctx->req),
&ctx->completion);
if (err)
goto unlock;
}
@ -125,6 +126,7 @@ static ssize_t hash_sendpage(struct socket *sock, struct page *page,
} else {
if (!ctx->more) {
err = crypto_ahash_init(&ctx->req);
err = af_alg_wait_for_completion(err, &ctx->completion);
if (err)
goto unlock;
}