4.9-stable review patch. If anyone has any objections, please let me know.
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From: Jason A. Donenfeld Jason@zx2c4.com
commit 89a5ea99662505d2d61f2a3030a6896c2cb3cdb0 upstream.
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 Signed-off-by: Nathan Chancellor natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/rxrpc/rxkad.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
--- a/net/rxrpc/rxkad.c +++ b/net/rxrpc/rxkad.c @@ -229,7 +229,9 @@ static int rxkad_secure_packet_encrypt(c 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);
@@ -325,7 +327,7 @@ static int rxkad_verify_packet_1(struct struct sk_buff *trailer; u32 data_size, buf; u16 check; - int nsg; + int nsg, ret;
_enter("");
@@ -342,7 +344,9 @@ static int rxkad_verify_packet_1(struct 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)); @@ -405,7 +409,7 @@ static int rxkad_verify_packet_2(struct struct sk_buff *trailer; u32 data_size, buf; u16 check; - int nsg; + int nsg, ret;
_enter(",{%d}", skb->len);
@@ -429,7 +433,12 @@ static int rxkad_verify_packet_2(struct }
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];