diff options
| -rw-r--r-- | net/tipc/msg.c | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/net/tipc/msg.c b/net/tipc/msg.c index ced60e2fc4f7..1e76d91e5691 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -76,10 +76,11 @@ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, u32 num_sect, unsigned int total_len, int max_size, struct sk_buff **buf) { - int dsz, sz, hsz, pos, res, cnt; + int dsz, sz, hsz; + unsigned char *to; dsz = total_len; - pos = hsz = msg_hdr_sz(hdr); + hsz = msg_hdr_sz(hdr); sz = hsz + dsz; msg_set_size(hdr, sz); if (unlikely(sz > max_size)) { @@ -91,16 +92,11 @@ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, if (!(*buf)) return -ENOMEM; skb_copy_to_linear_data(*buf, hdr, hsz); - for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { - skb_copy_to_linear_data_offset(*buf, pos, - msg_sect[cnt].iov_base, - msg_sect[cnt].iov_len); - pos += msg_sect[cnt].iov_len; + to = (*buf)->data + hsz; + if (total_len && memcpy_fromiovecend(to, msg_sect, 0, dsz)) { + kfree_skb(*buf); + *buf = NULL; + return -EFAULT; } - if (likely(res)) - return dsz; - - kfree_skb(*buf); - *buf = NULL; - return -EFAULT; + return dsz; } |