rxrpc: check return value of skb_to_sgvec always
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>
diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index 4374e7b..90df95e 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -229,7 +229,9 @@
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 @@
struct sk_buff *trailer;
u32 data_size, buf;
u16 check;
- int nsg;
+ int nsg, ret;
_enter("");
@@ -342,7 +344,9 @@
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 @@
struct sk_buff *trailer;
u32 data_size, buf;
u16 check;
- int nsg;
+ int nsg, ret;
_enter(",{%d}", skb->len);
@@ -429,7 +433,12 @@
}
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];