From 7ee07a38b310dc2836264033fe19ae1db14d03ff Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Sun, 19 Feb 2017 19:02:46 -0300 Subject: linux-libre-nand-4.9.11_gnu-1: updating version --- ...reeing-skb-too-early-for-IPV6_RECVPKTINFO.patch | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 kernels/linux-libre-nand/0001-dccp-fix-freeing-skb-too-early-for-IPV6_RECVPKTINFO.patch (limited to 'kernels/linux-libre-nand/0001-dccp-fix-freeing-skb-too-early-for-IPV6_RECVPKTINFO.patch') diff --git a/kernels/linux-libre-nand/0001-dccp-fix-freeing-skb-too-early-for-IPV6_RECVPKTINFO.patch b/kernels/linux-libre-nand/0001-dccp-fix-freeing-skb-too-early-for-IPV6_RECVPKTINFO.patch new file mode 100644 index 000000000..9adaf0b30 --- /dev/null +++ b/kernels/linux-libre-nand/0001-dccp-fix-freeing-skb-too-early-for-IPV6_RECVPKTINFO.patch @@ -0,0 +1,47 @@ +From 5edabca9d4cff7f1f2b68f0bac55ef99d9798ba4 Mon Sep 17 00:00:00 2001 +From: Andrey Konovalov +Date: Thu, 16 Feb 2017 17:22:46 +0100 +Subject: [PATCH] dccp: fix freeing skb too early for IPV6_RECVPKTINFO + +In the current DCCP implementation an skb for a DCCP_PKT_REQUEST packet +is forcibly freed via __kfree_skb in dccp_rcv_state_process if +dccp_v6_conn_request successfully returns. + +However, if IPV6_RECVPKTINFO is set on a socket, the address of the skb +is saved to ireq->pktopts and the ref count for skb is incremented in +dccp_v6_conn_request, so skb is still in use. Nevertheless, it gets freed +in dccp_rcv_state_process. + +Fix by calling consume_skb instead of doing goto discard and therefore +calling __kfree_skb. + +Similar fixes for TCP: + +fb7e2399ec17f1004c0e0ccfd17439f8759ede01 [TCP]: skb is unexpectedly freed. +0aea76d35c9651d55bbaf746e7914e5f9ae5a25d tcp: SYN packets are now +simply consumed + +Signed-off-by: Andrey Konovalov +Acked-by: Eric Dumazet +Signed-off-by: David S. Miller +--- + net/dccp/input.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/net/dccp/input.c b/net/dccp/input.c +index ba347184bda9b3fe..8fedc2d497709b3d 100644 +--- a/net/dccp/input.c ++++ b/net/dccp/input.c +@@ -606,7 +606,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb, + if (inet_csk(sk)->icsk_af_ops->conn_request(sk, + skb) < 0) + return 1; +- goto discard; ++ consume_skb(skb); ++ return 0; + } + if (dh->dccph_type == DCCP_PKT_RESET) + goto discard; +-- +2.11.1 + -- cgit v1.2.3