| From | Kamal Mostafa <> | Subject | [PATCH 4.2.y-ckt 048/273] crypto: algif_hash - wait for crypto_ahash_init() to complete | Date | Mon, 7 Mar 2016 14:47:19 -0800 |
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4.2.8-ckt5 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: "Wang, Rui Y" <rui.y.wang@intel.com>
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: Kamal Mostafa <kamal@canonical.com> --- crypto/algif_hash.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index 608a756..68a5cea 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -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; } -- 2.7.0
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