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-rw-r--r--net/netlink/genetlink.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 76aed0571e3a..7c136de117eb 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -757,6 +757,9 @@ static int genl_family_rcv_msg(const struct genl_family *family,
if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen))
return -EINVAL;
+ if (hdr->cmd >= family->resv_start_op && hdr->reserved)
+ return -EINVAL;
+
if (genl_get_cmd(hdr->cmd, family, &op))
return -EOPNOTSUPP;
@@ -1348,6 +1351,7 @@ static struct genl_family genl_ctrl __ro_after_init = {
.module = THIS_MODULE,
.ops = genl_ctrl_ops,
.n_ops = ARRAY_SIZE(genl_ctrl_ops),
+ .resv_start_op = CTRL_CMD_GETPOLICY + 1,
.mcgrps = genl_ctrl_groups,
.n_mcgrps = ARRAY_SIZE(genl_ctrl_groups),
.id = GENL_ID_CTRL,