Commit 9da75de0 authored Sep 09, 2015 by LABBE Corentin Committed by Herbert Xu Sep 10, 2015

crypto: sunxi-ss - Fix a possible driver hang with ciphers



The sun4i_ss_opti_poll function cipher data until the output miter have
a length of 0.
If the crypto API client, give more SGs than necessary this could result
in an infinite loop.
Fix it by checking for remaining bytes, just like sun4i_ss_cipher_poll().

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent f1ab4287

drivers/crypto/sunxi-ss/sun4i-ss-cipher.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -104,7 +104,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
	sg_miter_next(&mo);		sg_miter_next(&mo);
	oo = 0;		oo = 0;
	}		}
	} while (mo.length > 0);		} while (oleft > 0);

	if (areq->info) {		if (areq->info) {
	for (i = 0; i < 4 && i < ivsize / 4; i++) {		for (i = 0; i < 4 && i < ivsize / 4; i++) {