diff options
| -rw-r--r-- | crypto/scompress.c | 8 | ||||
| -rw-r--r-- | drivers/crypto/atmel-sha204a.c | 6 |
2 files changed, 10 insertions, 4 deletions
diff --git a/crypto/scompress.c b/crypto/scompress.c index f7ce29b4cdb8..8db4613150e0 100644 --- a/crypto/scompress.c +++ b/crypto/scompress.c @@ -202,8 +202,8 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) dpage = nth_page(dpage, doff / PAGE_SIZE); doff = offset_in_page(doff); - n = dlen / PAGE_SIZE; - n += (offset_in_page(dlen) + doff - 1) / PAGE_SIZE; + n = (dlen - 1) / PAGE_SIZE; + n += (offset_in_page(dlen - 1) + doff) / PAGE_SIZE; if (PageHighMem(dpage + n) && size_add(doff, dlen) > PAGE_SIZE) return -ENOSYS; @@ -224,8 +224,8 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir) spage = nth_page(spage, soff / PAGE_SIZE); soff = offset_in_page(soff); - n = slen / PAGE_SIZE; - n += (offset_in_page(slen) + soff - 1) / PAGE_SIZE; + n = (slen - 1) / PAGE_SIZE; + n += (offset_in_page(slen - 1) + soff) / PAGE_SIZE; if (PageHighMem(nth_page(spage, n)) && size_add(soff, slen) > PAGE_SIZE) break; diff --git a/drivers/crypto/atmel-sha204a.c b/drivers/crypto/atmel-sha204a.c index 75bebec2c757..0fcf4a39de27 100644 --- a/drivers/crypto/atmel-sha204a.c +++ b/drivers/crypto/atmel-sha204a.c @@ -163,6 +163,12 @@ static int atmel_sha204a_probe(struct i2c_client *client) i2c_priv->hwrng.name = dev_name(&client->dev); i2c_priv->hwrng.read = atmel_sha204a_rng_read; + /* + * According to review by Bill Cox [1], this HWRNG has very low entropy. + * [1] https://www.metzdowd.com/pipermail/cryptography/2014-December/023858.html + */ + i2c_priv->hwrng.quality = 1; + ret = devm_hwrng_register(&client->dev, &i2c_priv->hwrng); if (ret) dev_warn(&client->dev, "failed to register RNG (%d)\n", ret); |