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embeddable-wg-library: zero attribute padding

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See: http://git.netfilter.org/libmnl/commit/?id=37c876b55a2c00424ccda5a300ab5fdec1d88b22
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2018-05-03 19:07:55 +02:00
parent f36209f588
commit f8a990763a
1 changed files with 4 additions and 0 deletions
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4
contrib/embeddable-wg-library/wireguard.c
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@ -358,11 +358,15 @@ static void mnl_attr_put(struct nlmsghdr *nlh, uint16_t type, size_t len,
{ {
struct nlattr *attr = mnl_nlmsg_get_payload_tail(nlh); struct nlattr *attr = mnl_nlmsg_get_payload_tail(nlh);
uint16_t payload_len = MNL_ALIGN(sizeof(struct nlattr)) + len; uint16_t payload_len = MNL_ALIGN(sizeof(struct nlattr)) + len;
int pad;
attr->nla_type = type; attr->nla_type = type;
attr->nla_len = payload_len; attr->nla_len = payload_len;
memcpy(mnl_attr_get_payload(attr), data, len); memcpy(mnl_attr_get_payload(attr), data, len);
nlh->nlmsg_len += MNL_ALIGN(payload_len); nlh->nlmsg_len += MNL_ALIGN(payload_len);
pad = MNL_ALIGN(len) - len;
if (pad > 0)
memset(mnl_attr_get_payload(attr) + len, 0, pad);
} }
static void mnl_attr_put_u16(struct nlmsghdr *nlh, uint16_t type, uint16_t data) static void mnl_attr_put_u16(struct nlmsghdr *nlh, uint16_t type, uint16_t data)