brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 23:36:23 +09:00
Code Issues Projects Releases Wiki Activity

crypto: xts - Fix use-after-free on EINPROGRESS

Browse Source 
When we get an EINPROGRESS completion in xts, 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: f1c131b454 ("crypto: xts - Convert to skcipher")
Cc: <stable@vger.kernel.org>
Reported-by: Nathan Royce <nroycea+kernel@gmail.com>
Reported-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Herbert Xu 2017-04-08 10:02:46 +08:00
parent 40c98cb57c
commit aa4a829bda
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
crypto/xts.c
View File

@ -286,6 +286,13 @@ 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;
@ -293,6 +300,7 @@ static void encrypt_done(struct crypto_async_request *areq, int err)
if (rctx->left)
return;
out:
skcipher_request_complete(req, err);
}
@ -330,6 +338,13 @@ 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;
@ -337,6 +352,7 @@ static void decrypt_done(struct crypto_async_request *areq, int err)
if (rctx->left)
return;
out:
skcipher_request_complete(req, err);
}