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Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index ae37586f6ee8..10684833f864 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5420,6 +5420,18 @@ static int generic_xdp_install(struct net_device *dev, struct netdev_bpf *xdp)
struct bpf_prog *new = xdp->prog;
int ret = 0;
+ if (new) {
+ u32 i;
+
+ /* generic XDP does not work with DEVMAPs that can
+ * have a bpf_prog installed on an entry
+ */
+ for (i = 0; i < new->aux->used_map_cnt; i++) {
+ if (dev_map_can_have_prog(new->aux->used_maps[i]))
+ return -EINVAL;
+ }
+ }
+
switch (xdp->command) {
case XDP_SETUP_PROG:
rcu_assign_pointer(dev->xdp_prog, new);
@@ -8835,6 +8847,12 @@ int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
return -EINVAL;
}
+ if (prog->expected_attach_type == BPF_XDP_DEVMAP) {
+ NL_SET_ERR_MSG(extack, "BPF_XDP_DEVMAP programs can not be attached to a device");
+ bpf_prog_put(prog);
+ return -EINVAL;
+ }
+
/* prog->aux->id may be 0 for orphaned device-bound progs */
if (prog->aux->id && prog->aux->id == prog_id) {
bpf_prog_put(prog);