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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2019-04-15 09:35:19 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-04-18 17:13:46 +0300 |
| commit | 44427c0fbc09b448b22410978a4ef6ee37599d25 (patch) | |
| tree | 627b51f2fb828907f1b06088bd1832d798074a49 | |
| parent | 678cce4019d746da6c680c48ba9e6d417803e127 (diff) | |
| download | linux-44427c0fbc09b448b22410978a4ef6ee37599d25.tar.xz | |
crypto: xts - Fix atomic sleep when walking skcipher
When we perform a walk in the completion function, we need to ensure
that it is atomic.
Reported-by: syzbot+6f72c20560060c98b566@syzkaller.appspotmail.com
Fixes: 78105c7e769b ("crypto: xts - Drop use of auxiliary buffer")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/xts.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/crypto/xts.c b/crypto/xts.c index 847f54f76789..2f948328cabb 100644 --- a/crypto/xts.c +++ b/crypto/xts.c @@ -137,8 +137,12 @@ static void crypt_done(struct crypto_async_request *areq, int err) { struct skcipher_request *req = areq->data; - if (!err) + if (!err) { + struct rctx *rctx = skcipher_request_ctx(req); + + rctx->subreq.base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; err = xor_tweak_post(req); + } skcipher_request_complete(req, err); } |