[PATCH net-next 02/20] netlink: Add extack message to nlmsg_parse for invalid header length
From: David Ahern <dsahern@kernel.org>
Date: 2018-10-05 04:29:12
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: David Ahern <redacted> Give a user a reason why EINVAL is returned in nlmsg_parse. Signed-off-by: David Ahern <redacted> --- include/net/netlink.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
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);
--
2.11.0