From: Xin Long <lucien.xin@xxxxxxxxx> Date: Tue, 12 Feb 2019 18:47:30 +0800 > Jianlin reported a panic when running sctp gso over gre over vlan device: ... > It was caused by SKB_GSO_CB(skb)->csum_start not set in sctp_gso_segment. > sctp_gso_segment() calls skb_segment() with 'feature | NETIF_F_HW_CSUM', > which causes SKB_GSO_CB(skb)->csum_start not to be set in skb_segment(). > > For TCP/UDP, when feature supports HW_CSUM, CHECKSUM_PARTIAL will be set > and gso_reset_checksum will be called to set SKB_GSO_CB(skb)->csum_start. > > So SCTP should do the same as TCP/UDP, to call gso_reset_checksum() when > computing checksum in sctp_gso_segment. > > Reported-by: Jianlin Shi <jishi@xxxxxxxxxx> > Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx> Applied and queued up for -stable, thanks.
