From d15f5ac8deea936d3adf629421a66a88b42b8a2f Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 20 Dec 2018 21:20:10 +0800 Subject: [PATCH] ipv6: frags: Fix bogus skb->sk in reassembled packets It was reported that IPsec would crash when it encounters an IPv6 reassembled packet because skb->sk is non-zero and not a valid pointer. This is because skb->sk is now a union with ip_defrag_offset. This patch fixes this by resetting skb->sk when exiting from the reassembly code. Reported-by: Xiumei Mu Fixes: 219badfaade9 ("ipv6: frags: get rid of ip6frag_skb_cb/...") Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/ipv6/reassembly.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index aa26c45486d9..a5bb59ee50ac 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -384,6 +384,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, if (skb_try_coalesce(head, fp, &headstolen, &delta)) { kfree_skb_partial(fp, headstolen); } else { + fp->sk = NULL; if (!skb_shinfo(head)->frag_list) skb_shinfo(head)->frag_list = fp; head->data_len += fp->len;