From: Herbert Xu <[email protected]> commit 44427c0fbc09b448b22410978a4ef6ee37599d25 upstream.
When we perform a walk in the completion function, we need to ensure that it is atomic. Reported-by: [email protected] Fixes: 78105c7e769b ("crypto: xts - Drop use of auxiliary buffer") Cc: <[email protected]> Signed-off-by: Herbert Xu <[email protected]> Acked-by: Ondrej Mosnacek <[email protected]> Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- crypto/xts.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/crypto/xts.c +++ b/crypto/xts.c @@ -137,8 +137,12 @@ static void crypt_done(struct crypto_asy { 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); }
