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authorDavid Ahern <dsahern@gmail.com>2018-10-07 20:16:23 -0700
committerDavid S. Miller <davem@davemloft.net>2018-10-08 10:39:03 -0700
commit3d0d4337d7a105c5e8ba85c6e7b75437b4c6745e (patch)
tree308b38a3ba0246680b43600d771c0a276d2e8049 /include/net/netlink.h
parent4a19edb60d0203cd5bf95a8b46ea8f63fd41194c (diff)
netlink: Add extack message to nlmsg_parse for invalid header length
Give a user a reason why EINVAL is returned in nlmsg_parse. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Christian Brauner <christian@brauner.io> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netlink.h')
-rw-r--r--include/net/netlink.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/net/netlink.h b/include/net/netlink.h
index 589683091f16..9522a0bf1f3a 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -516,8 +516,10 @@ static inline int nlmsg_parse(const struct nlmsghdr *nlh, int hdrlen,
const struct nla_policy *policy,
struct netlink_ext_ack *extack)
{
- if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen))
+ if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) {
+ NL_SET_ERR_MSG(extack, "Invalid header length");
return -EINVAL;
+ }
return nla_parse(tb, maxtype, nlmsg_attrdata(nlh, hdrlen),
nlmsg_attrlen(nlh, hdrlen), policy, extack);