net: handle ARPHRD_PIMREG in dev_is_mac_header_xmit()

[ Upstream commit 4ee06de7729d795773145692e246a06448b1eb7a ]

This kind of interface doesn't have a mac header. This patch fixes
bpf_redirect() to a PIM interface.

Fixes: 27b29f63058d ("bpf: add bpf_redirect() helper")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Link: https://lore.kernel.org/r/20220315092008.31423-1-nicolas.dichtel@6wind.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h
index b712217..1ed5244 100644 (file)
--- a/include/linux/if_arp.h
+++ b/include/linux/if_arp.h
@@ -52,6 +52,7 @@ static inline bool dev_is_mac_header_xmit(const struct net_device *dev)
        case ARPHRD_VOID:
        case ARPHRD_NONE:
        case ARPHRD_RAWIP:
+       case ARPHRD_PIMREG:
                return false;
        default:
                return true;