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rxrpc: check return value of skb_to_sgvec always

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason A. Donenfeld 2017-06-04 04:16:24 +02:00 committed by David S. Miller
parent 3f29770723
commit 89a5ea9966
1 changed files with 14 additions and 5 deletions
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19
net/rxrpc/rxkad.c
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@ -227,7 +227,9 @@ static int rxkad_secure_packet_encrypt(const struct rxrpc_call *call,
len &= ~(call->conn->size_align - 1);
sg_init_table(sg, nsg);
skb_to_sgvec(skb, sg, 0, len);
err = skb_to_sgvec(skb, sg, 0, len);
if (unlikely(err < 0))
goto out;
skcipher_request_set_crypt(req, sg, sg, len, iv.x);
crypto_skcipher_encrypt(req);
@ -324,7 +326,7 @@ static int rxkad_verify_packet_1(struct rxrpc_call *call, struct sk_buff *skb,
bool aborted;
u32 data_size, buf;
u16 check;
int nsg;
int nsg, ret;
_enter("");
@ -342,7 +344,9 @@ static int rxkad_verify_packet_1(struct rxrpc_call *call, struct sk_buff *skb,
goto nomem;
sg_init_table(sg, nsg);
skb_to_sgvec(skb, sg, offset, 8);
ret = skb_to_sgvec(skb, sg, offset, 8);
if (unlikely(ret < 0))
return ret;
/* start the decryption afresh */
memset(&iv, 0, sizeof(iv));
@ -409,7 +413,7 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb,
bool aborted;
u32 data_size, buf;
u16 check;
int nsg;
int nsg, ret;
_enter(",{%d}", skb->len);
@ -434,7 +438,12 @@ static int rxkad_verify_packet_2(struct rxrpc_call *call, struct sk_buff *skb,
}
sg_init_table(sg, nsg);
skb_to_sgvec(skb, sg, offset, len);
ret = skb_to_sgvec(skb, sg, offset, len);
if (unlikely(ret < 0)) {
if (sg != _sg)
kfree(sg);
return ret;
}
/* decrypt from the session key */
token = call->conn->params.key->payload.data[0];