aboutsummaryrefslogtreecommitdiffstats
path: root/crypto
diff options
context:
space:
mode:
authorHerbert Xu <herbert@gondor.apana.org.au>2017-04-10 17:15:48 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2017-04-10 19:09:17 +0800
commit4702bbeefb490e315189636a5588628c1151223d (patch)
treec0c35538cd7fc5c2ea5041171440157cea22055b /crypto
parentaa4a829bdaced81e70c215a84ef6595ce8bd4308 (diff)
crypto: lrw - Fix use-after-free on EINPROGRESS
When we get an EINPROGRESS completion in lrw, we will end up marking the request as done and freeing it. This then blows up when the request is really completed as we've already freed the memory. Fixes: 700cb3f5fe75 ("crypto: lrw - Convert to skcipher") Cc: <stable@vger.kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/lrw.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/crypto/lrw.c b/crypto/lrw.c
index 3ea095adafd9..a8bfae4451bf 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -345,6 +345,13 @@ static void encrypt_done(struct crypto_async_request *areq, int err)
struct rctx *rctx;
rctx = skcipher_request_ctx(req);
+
+ if (err == -EINPROGRESS) {
+ if (rctx->left != req->cryptlen)
+ return;
+ goto out;
+ }
+
subreq = &rctx->subreq;
subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
@@ -352,6 +359,7 @@ static void encrypt_done(struct crypto_async_request *areq, int err)
if (rctx->left)
return;
+out:
skcipher_request_complete(req, err);
}
@@ -389,6 +397,13 @@ static void decrypt_done(struct crypto_async_request *areq, int err)
struct rctx *rctx;
rctx = skcipher_request_ctx(req);
+
+ if (err == -EINPROGRESS) {
+ if (rctx->left != req->cryptlen)
+ return;
+ goto out;
+ }
+
subreq = &rctx->subreq;
subreq->base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
@@ -396,6 +411,7 @@ static void decrypt_done(struct crypto_async_request *areq, int err)
if (rctx->left)
return;
+out:
skcipher_request_complete(req, err);
}

Privacy Policy