[PATCH 2/2] [CRYPTO] users: Fix up scatterlist conversion errors

From: Herbert Xu
Date: Fri Oct 26 2007 - 11:00:50 EST

[CRYPTO] users: Fix up scatterlist conversion errors

This patch fixes the errors made in the users of the crypto layer during
the sg_init_table conversion. It also adds a few conversions that were
missing altogether.

Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---

drivers/crypto/padlock-sha.c | 4 +-
drivers/md/dm-crypt.c | 2 -
drivers/net/ppp_mppe.c | 10 ++++-
drivers/scsi/iscsi_tcp.c | 5 +-
fs/ecryptfs/crypto.c | 2 +
net/ipv4/esp4.c | 7 ++-
net/ipv6/esp6.c | 8 +++-
net/rxrpc/rxkad.c | 66 +++++++++++++++++-----------------
net/sctp/auth.c | 3 -
net/sctp/sm_make_chunk.c | 6 +--
net/sunrpc/auth_gss/gss_krb5_crypto.c | 34 +++++++++++++----
net/sunrpc/auth_gss/gss_spkm3_seal.c | 2 -
net/sunrpc/xdr.c | 2 +
13 files changed, 93 insertions(+), 58 deletions(-)

diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index 4e8de16..c666b4e 100644
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -55,7 +55,7 @@ static void padlock_sha_bypass(struct crypto_tfm *tfm)
if (ctx(tfm)->data && ctx(tfm)->used) {
struct scatterlist sg;

- sg_set_buf(&sg, ctx(tfm)->data, ctx(tfm)->used);
+ sg_init_one(&sg, ctx(tfm)->data, ctx(tfm)->used);
crypto_hash_update(&ctx(tfm)->fallback, &sg, sg.length);
}

@@ -79,7 +79,7 @@ static void padlock_sha_update(struct crypto_tfm *tfm,

if (unlikely(ctx(tfm)->bypass)) {
struct scatterlist sg;
- sg_set_buf(&sg, (uint8_t *)data, length);
+ sg_init_one(&sg, (uint8_t *)data, length);
crypto_hash_update(&ctx(tfm)->fallback, &sg, length);
return;
}
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 1c159ac..28c6ae0 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -168,7 +168,7 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
return -ENOMEM;
}

- sg_set_buf(&sg, cc->key, cc->key_size);
+ sg_init_one(&sg, cc->key, cc->key_size);
desc.tfm = hash_tfm;
desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
err = crypto_hash_digest(&desc, &sg, cc->key_size, salt);
diff --git a/drivers/net/ppp_mppe.c b/drivers/net/ppp_mppe.c
index bcb0885..b35d794 100644
--- a/drivers/net/ppp_mppe.c
+++ b/drivers/net/ppp_mppe.c
@@ -68,7 +68,7 @@ MODULE_VERSION("1.0.2");
static unsigned int
setup_sg(struct scatterlist *sg, const void *address, unsigned int length)
{
- sg_init_one(sg, address, length);
+ sg_set_buf(sg, address, length);
return length;
}

@@ -140,6 +140,8 @@ static void get_new_key_from_sha(struct ppp_mppe_state * state)
struct scatterlist sg[4];
unsigned int nbytes;

+ sg_init_table(sg, 4);
+
nbytes = setup_sg(&sg[0], state->master_key, state->keylen);
nbytes += setup_sg(&sg[1], sha_pad->sha_pad1,
sizeof(sha_pad->sha_pad1));
@@ -166,6 +168,8 @@ static void mppe_rekey(struct ppp_mppe_state * state, int initial_key)
if (!initial_key) {
crypto_blkcipher_setkey(state->arc4, state->sha1_digest,
state->keylen);
+ sg_init_table(sg_in, 1);
+ sg_init_table(sg_out, 1);
setup_sg(sg_in, state->sha1_digest, state->keylen);
setup_sg(sg_out, state->session_key, state->keylen);
if (crypto_blkcipher_encrypt(&desc, sg_out, sg_in,
@@ -421,6 +425,8 @@ mppe_compress(void *arg, unsigned char *ibuf, unsigned char *obuf,
isize -= 2;

/* Encrypt packet */
+ sg_init_table(sg_in, 1);
+ sg_init_table(sg_out, 1);
setup_sg(sg_in, ibuf, isize);
setup_sg(sg_out, obuf, osize);
if (crypto_blkcipher_encrypt(&desc, sg_out, sg_in, isize) != 0) {
@@ -608,6 +614,8 @@ mppe_decompress(void *arg, unsigned char *ibuf, int isize, unsigned char *obuf,
* Decrypt the first byte in order to check if it is
* a compressed or uncompressed protocol field.
*/
+ sg_init_table(sg_in, 1);
+ sg_init_table(sg_out, 1);
setup_sg(sg_in, ibuf, 1);
setup_sg(sg_out, obuf, 1);
if (crypto_blkcipher_decrypt(&desc, sg_out, sg_in, 1) != 0) {
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 097a136..4bcf916 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -674,9 +674,8 @@ partial_sg_digest_update(struct hash_desc *desc, struct scatterlist *sg,
{
struct scatterlist temp;

- memcpy(&temp, sg, sizeof(struct scatterlist));
- temp.offset = offset;
- temp.length = length;
+ sg_init_table(&temp, 1);
+ sg_set_page(&temp, sg_page(sg), length, offset);
crypto_hash_update(desc, &temp, length);
}

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 7a472b1..9d70289 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -279,6 +279,8 @@ int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
int offset;
int remainder_of_page;

+ sg_init_table(sg, sg_size);
+
while (size > 0 && i < sg_size) {
pg = virt_to_page(addr);
offset = offset_in_page(addr);
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index ba98401..194b1e7 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -111,7 +111,9 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
goto unlock;
}
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg, esph->enc_data+esp->conf.ivlen-skb->data, clen);
+ sg_mark_end(sg, skb_to_sgvec(skb, sg, esph->enc_data +
+ esp->conf.ivlen -
+ skb->data, clen));
err = crypto_blkcipher_encrypt(&desc, sg, sg, clen);
if (unlikely(sg != &esp->sgbuf[0]))
kfree(sg);
@@ -203,7 +205,8 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
goto out;
}
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg, sizeof(*esph) + esp->conf.ivlen, elen);
+ sg_mark_end(sg, skb_to_sgvec(skb, sg, sizeof(*esph) + esp->conf.ivlen,
+ elen));
err = crypto_blkcipher_decrypt(&desc, sg, sg, elen);
if (unlikely(sg != &esp->sgbuf[0]))
kfree(sg);
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index f67d51a..f992405 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -110,7 +110,9 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
goto unlock;
}
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg, esph->enc_data+esp->conf.ivlen-skb->data, clen);
+ sg_mark_end(sg, skb_to_sgvec(skb, sg, esph->enc_data +
+ esp->conf.ivlen -
+ skb->data, clen));
err = crypto_blkcipher_encrypt(&desc, sg, sg, clen);
if (unlikely(sg != &esp->sgbuf[0]))
kfree(sg);
@@ -207,7 +209,9 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
}
}
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg, sizeof(*esph) + esp->conf.ivlen, elen);
+ sg_mark_end(sg, skb_to_sgvec(skb, sg,
+ sizeof(*esph) + esp->conf.ivlen,
+ elen));
ret = crypto_blkcipher_decrypt(&desc, sg, sg, elen);
if (unlikely(sg != &esp->sgbuf[0]))
kfree(sg);
diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index ac3cabd..eebefb6 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -135,9 +135,8 @@ static void rxkad_prime_packet_security(struct rxrpc_connection *conn)
tmpbuf.x[2] = 0;
tmpbuf.x[3] = htonl(conn->security_ix);

- memset(sg, 0, sizeof(sg));
- sg_set_buf(&sg[0], &tmpbuf, sizeof(tmpbuf));
- sg_set_buf(&sg[1], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[0], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[1], &tmpbuf, sizeof(tmpbuf));
crypto_blkcipher_encrypt_iv(&desc, &sg[0], &sg[1], sizeof(tmpbuf));

memcpy(&conn->csum_iv, &tmpbuf.x[2], sizeof(conn->csum_iv));
@@ -180,9 +179,8 @@ static int rxkad_secure_packet_auth(const struct rxrpc_call *call,
desc.info = iv.x;
desc.flags = 0;

- memset(sg, 0, sizeof(sg));
- sg_set_buf(&sg[0], &tmpbuf, sizeof(tmpbuf));
- sg_set_buf(&sg[1], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[0], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[1], &tmpbuf, sizeof(tmpbuf));
crypto_blkcipher_encrypt_iv(&desc, &sg[0], &sg[1], sizeof(tmpbuf));

memcpy(sechdr, &tmpbuf, sizeof(tmpbuf));
@@ -227,9 +225,8 @@ static int rxkad_secure_packet_encrypt(const struct rxrpc_call *call,
desc.info = iv.x;
desc.flags = 0;

- memset(sg, 0, sizeof(sg[0]) * 2);
- sg_set_buf(&sg[0], sechdr, sizeof(rxkhdr));
- sg_set_buf(&sg[1], &rxkhdr, sizeof(rxkhdr));
+ sg_init_one(&sg[0], sechdr, sizeof(rxkhdr));
+ sg_init_one(&sg[1], &rxkhdr, sizeof(rxkhdr));
crypto_blkcipher_encrypt_iv(&desc, &sg[0], &sg[1], sizeof(rxkhdr));

/* we want to encrypt the skbuff in-place */
@@ -240,7 +237,7 @@ static int rxkad_secure_packet_encrypt(const struct rxrpc_call *call,
len = data_size + call->conn->size_align - 1;
len &= ~(call->conn->size_align - 1);

- skb_to_sgvec(skb, sg, 0, len);
+ sg_init_table(sg, skb_to_sgvec(skb, sg, 0, len));
crypto_blkcipher_encrypt_iv(&desc, sg, sg, len);

_leave(" = 0");
@@ -290,9 +287,8 @@ static int rxkad_secure_packet(const struct rxrpc_call *call,
tmpbuf.x[0] = sp->hdr.callNumber;
tmpbuf.x[1] = x;

- memset(&sg, 0, sizeof(sg));
- sg_set_buf(&sg[0], &tmpbuf, sizeof(tmpbuf));
- sg_set_buf(&sg[1], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[0], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[1], &tmpbuf, sizeof(tmpbuf));
crypto_blkcipher_encrypt_iv(&desc, &sg[0], &sg[1], sizeof(tmpbuf));

x = ntohl(tmpbuf.x[1]);
@@ -332,20 +328,23 @@ static int rxkad_verify_packet_auth(const struct rxrpc_call *call,
struct rxrpc_skb_priv *sp;
struct blkcipher_desc desc;
struct rxrpc_crypt iv;
- struct scatterlist sg[2];
+ struct scatterlist sg[16];
struct sk_buff *trailer;
u32 data_size, buf;
u16 check;
+ int nsg;

_enter("");

sp = rxrpc_skb(skb);

/* we want to decrypt the skbuff in-place */
- if (skb_cow_data(skb, 0, &trailer) < 0)
+ nsg = skb_cow_data(skb, 0, &trailer);
+ if (nsg < 0 || nsg > 16)
goto nomem;

- skb_to_sgvec(skb, sg, 0, 8);
+ sg_init_table(sg, nsg);
+ sg_mark_end(sg, skb_to_sgvec(skb, sg, 0, 8));

/* start the decryption afresh */
memset(&iv, 0, sizeof(iv));
@@ -426,7 +425,8 @@ static int rxkad_verify_packet_encrypt(const struct rxrpc_call *call,
goto nomem;
}

- skb_to_sgvec(skb, sg, 0, skb->len);
+ sg_init_table(sg, nsg);
+ sg_mark_end(sg, skb_to_sgvec(skb, sg, 0, skb->len));

/* decrypt from the session key */
payload = call->conn->key->payload.data;
@@ -521,9 +521,8 @@ static int rxkad_verify_packet(const struct rxrpc_call *call,
tmpbuf.x[0] = call->call_id;
tmpbuf.x[1] = x;

- memset(&sg, 0, sizeof(sg));
- sg_set_buf(&sg[0], &tmpbuf, sizeof(tmpbuf));
- sg_set_buf(&sg[1], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[0], &tmpbuf, sizeof(tmpbuf));
+ sg_init_one(&sg[1], &tmpbuf, sizeof(tmpbuf));
crypto_blkcipher_encrypt_iv(&desc, &sg[0], &sg[1], sizeof(tmpbuf));

x = ntohl(tmpbuf.x[1]);
@@ -690,16 +689,20 @@ static void rxkad_calc_response_checksum(struct rxkad_response *response)
static void rxkad_sg_set_buf2(struct scatterlist sg[2],
void *buf, size_t buflen)
{
+ int nsg = 1;

- memset(sg, 0, sizeof(sg));
+ sg_init_table(sg, 2);

sg_set_buf(&sg[0], buf, buflen);
if (sg[0].offset + buflen > PAGE_SIZE) {
/* the buffer was split over two pages */
sg[0].length = PAGE_SIZE - sg[0].offset;
sg_set_buf(&sg[1], buf + sg[0].length, buflen - sg[0].length);
+ nsg++;
}

+ sg_mark_end(sg, nsg);
+
ASSERTCMP(sg[0].length + sg[1].length, ==, buflen);
}

@@ -712,7 +715,7 @@ static void rxkad_encrypt_response(struct rxrpc_connection *conn,
{
struct blkcipher_desc desc;
struct rxrpc_crypt iv;
- struct scatterlist ssg[2], dsg[2];
+ struct scatterlist sg[2];

/* continue encrypting from where we left off */
memcpy(&iv, s2->session_key, sizeof(iv));
@@ -720,9 +723,8 @@ static void rxkad_encrypt_response(struct rxrpc_connection *conn,
desc.info = iv.x;
desc.flags = 0;

- rxkad_sg_set_buf2(ssg, &resp->encrypted, sizeof(resp->encrypted));
- memcpy(dsg, ssg, sizeof(dsg));
- crypto_blkcipher_encrypt_iv(&desc, dsg, ssg, sizeof(resp->encrypted));
+ rxkad_sg_set_buf2(sg, &resp->encrypted, sizeof(resp->encrypted));
+ crypto_blkcipher_encrypt_iv(&desc, sg, sg, sizeof(resp->encrypted));
}

/*
@@ -817,7 +819,7 @@ static int rxkad_decrypt_ticket(struct rxrpc_connection *conn,
{
struct blkcipher_desc desc;
struct rxrpc_crypt iv, key;
- struct scatterlist ssg[1], dsg[1];
+ struct scatterlist sg[1];
struct in_addr addr;
unsigned life;
time_t issue, now;
@@ -850,9 +852,8 @@ static int rxkad_decrypt_ticket(struct rxrpc_connection *conn,
desc.info = iv.x;
desc.flags = 0;

- sg_init_one(&ssg[0], ticket, ticket_len);
- memcpy(dsg, ssg, sizeof(dsg));
- crypto_blkcipher_decrypt_iv(&desc, dsg, ssg, ticket_len);
+ sg_init_one(&sg[0], ticket, ticket_len);
+ crypto_blkcipher_decrypt_iv(&desc, sg, sg, ticket_len);

p = ticket;
end = p + ticket_len;
@@ -961,7 +962,7 @@ static void rxkad_decrypt_response(struct rxrpc_connection *conn,
const struct rxrpc_crypt *session_key)
{
struct blkcipher_desc desc;
- struct scatterlist ssg[2], dsg[2];
+ struct scatterlist sg[2];
struct rxrpc_crypt iv;

_enter(",,%08x%08x",
@@ -979,9 +980,8 @@ static void rxkad_decrypt_response(struct rxrpc_connection *conn,
desc.info = iv.x;
desc.flags = 0;

- rxkad_sg_set_buf2(ssg, &resp->encrypted, sizeof(resp->encrypted));
- memcpy(dsg, ssg, sizeof(dsg));
- crypto_blkcipher_decrypt_iv(&desc, dsg, ssg, sizeof(resp->encrypted));
+ rxkad_sg_set_buf2(sg, &resp->encrypted, sizeof(resp->encrypted));
+ crypto_blkcipher_decrypt_iv(&desc, sg, sg, sizeof(resp->encrypted));
mutex_unlock(&rxkad_ci_mutex);

_leave("");
diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 621113a..7cf9666 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -726,8 +726,7 @@ void sctp_auth_calculate_hmac(const struct sctp_association *asoc,

/* set up scatter list */
end = skb_tail_pointer(skb);
- sg_init_table(&sg, 1);
- sg_set_buf(&sg, auth, end - (unsigned char *)auth);
+ sg_init_one(&sg, auth, end - (unsigned char *)auth);

desc.tfm = asoc->ep->auth_hmacs[hmac_id];
desc.flags = 0;
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index c055212..c377e4e 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1513,8 +1513,7 @@ static sctp_cookie_param_t *sctp_pack_cookie(const struct sctp_endpoint *ep,
struct hash_desc desc;

/* Sign the message. */
- sg_init_table(&sg, 1);
- sg_set_buf(&sg, &cookie->c, bodysize);
+ sg_init_one(&sg, &cookie->c, bodysize);
keylen = SCTP_SECRET_SIZE;
key = (char *)ep->secret_key[ep->current_key];
desc.tfm = sctp_sk(ep->base.sk)->hmac;
@@ -1584,8 +1583,7 @@ struct sctp_association *sctp_unpack_cookie(

/* Check the signature. */
keylen = SCTP_SECRET_SIZE;
- sg_init_table(&sg, 1);
- sg_set_buf(&sg, bear_cookie, bodysize);
+ sg_init_one(&sg, bear_cookie, bodysize);
key = (char *)ep->secret_key[ep->current_key];
desc.tfm = sctp_sk(ep->base.sk)->hmac;
desc.flags = 0;
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index 24711be..91cd8f0 100644
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c
@@ -75,7 +75,7 @@ krb5_encrypt(
memcpy(local_iv, iv, crypto_blkcipher_ivsize(tfm));

memcpy(out, in, length);
- sg_set_buf(sg, out, length);
+ sg_init_one(sg, out, length);

ret = crypto_blkcipher_encrypt_iv(&desc, sg, sg, length);
out:
@@ -110,7 +110,7 @@ krb5_decrypt(
memcpy(local_iv,iv, crypto_blkcipher_ivsize(tfm));

memcpy(out, in, length);
- sg_set_buf(sg, out, length);
+ sg_init_one(sg, out, length);

ret = crypto_blkcipher_decrypt_iv(&desc, sg, sg, length);
out:
@@ -146,7 +146,7 @@ make_checksum(char *cksumname, char *header, int hdrlen, struct xdr_buf *body,
err = crypto_hash_init(&desc);
if (err)
goto out;
- sg_set_buf(sg, header, hdrlen);
+ sg_init_one(sg, header, hdrlen);
err = crypto_hash_update(&desc, sg, hdrlen);
if (err)
goto out;
@@ -188,8 +188,6 @@ encryptor(struct scatterlist *sg, void *data)
/* Worst case is 4 fragments: head, end of page 1, start
* of page 2, tail. Anything more is a bug. */
BUG_ON(desc->fragno > 3);
- desc->infrags[desc->fragno] = *sg;
- desc->outfrags[desc->fragno] = *sg;

page_pos = desc->pos - outbuf->head[0].iov_len;
if (page_pos >= 0 && page_pos < outbuf->page_len) {
@@ -199,7 +197,10 @@ encryptor(struct scatterlist *sg, void *data)
} else {
in_page = sg_page(sg);
}
- sg_assign_page(&desc->infrags[desc->fragno], in_page);
+ sg_set_page(&desc->infrags[desc->fragno], in_page, sg->length,
+ sg->offset);
+ sg_set_page(&desc->outfrags[desc->fragno], sg_page(sg), sg->length,
+ sg->offset);
desc->fragno++;
desc->fraglen += sg->length;
desc->pos += sg->length;
@@ -210,10 +211,17 @@ encryptor(struct scatterlist *sg, void *data)
if (thislen == 0)
return 0;

+ sg_mark_end(desc->infrags, desc->fragno);
+ sg_mark_end(desc->outfrags, desc->fragno);
+
ret = crypto_blkcipher_encrypt_iv(&desc->desc, desc->outfrags,
desc->infrags, thislen);
if (ret)
return ret;
+
+ sg_init_table(desc->infrags, 4);
+ sg_init_table(desc->outfrags, 4);
+
if (fraglen) {
sg_set_page(&desc->outfrags[0], sg_page(sg), fraglen,
sg->offset + sg->length - fraglen);
@@ -247,6 +255,9 @@ gss_encrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *buf,
desc.fragno = 0;
desc.fraglen = 0;

+ sg_init_table(desc.infrags, 4);
+ sg_init_table(desc.outfrags, 4);
+
ret = xdr_process_buf(buf, offset, buf->len - offset, encryptor, &desc);
return ret;
}
@@ -271,7 +282,8 @@ decryptor(struct scatterlist *sg, void *data)
/* Worst case is 4 fragments: head, end of page 1, start
* of page 2, tail. Anything more is a bug. */
BUG_ON(desc->fragno > 3);
- desc->frags[desc->fragno] = *sg;
+ sg_set_page(&desc->frags[desc->fragno], sg_page(sg), sg->length,
+ sg->offset);
desc->fragno++;
desc->fraglen += sg->length;

@@ -281,10 +293,15 @@ decryptor(struct scatterlist *sg, void *data)
if (thislen == 0)
return 0;

+ sg_mark_end(desc->frags, desc->fragno);
+
ret = crypto_blkcipher_decrypt_iv(&desc->desc, desc->frags,
desc->frags, thislen);
if (ret)
return ret;
+
+ sg_init_table(desc->frags, 4);
+
if (fraglen) {
sg_set_page(&desc->frags[0], sg_page(sg), fraglen,
sg->offset + sg->length - fraglen);
@@ -312,6 +329,9 @@ gss_decrypt_xdr_buf(struct crypto_blkcipher *tfm, struct xdr_buf *buf,
desc.desc.flags = 0;
desc.fragno = 0;
desc.fraglen = 0;
+
+ sg_init_table(desc.frags, 4);
+
return xdr_process_buf(buf, offset, buf->len - offset, decryptor, &desc);
}

diff --git a/net/sunrpc/auth_gss/gss_spkm3_seal.c b/net/sunrpc/auth_gss/gss_spkm3_seal.c
index d158635..abf17ce 100644
--- a/net/sunrpc/auth_gss/gss_spkm3_seal.c
+++ b/net/sunrpc/auth_gss/gss_spkm3_seal.c
@@ -173,7 +173,7 @@ make_spkm3_checksum(s32 cksumtype, struct xdr_netobj *key, char *header,
if (err)
goto out;

- sg_set_buf(sg, header, hdrlen);
+ sg_init_one(sg, header, hdrlen);
crypto_hash_update(&desc, sg, sg->length);

xdr_process_buf(body, body_offset, body->len - body_offset,
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index f38dac3..fdc5e6d 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -1030,6 +1030,8 @@ xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len,
unsigned page_len, thislen, page_offset;
struct scatterlist sg[1];

+ sg_init_table(sg, 1);
+
if (offset >= buf->head[0].iov_len) {
offset -= buf->head[0].iov_len;
} else {
-
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