From c25463722509fef0ed630b271576a8c9a70236f3 Mon Sep 17 00:00:00 2001 From: Mathias Krause Date: Fri, 14 Sep 2012 09:58:32 +0000 Subject: [PATCH] xfrm_user: return error pointer instead of NULL #2 When dump_one_policy() returns an error, e.g. because of a too small buffer to dump the whole xfrm policy, xfrm_policy_netlink() returns NULL instead of an error pointer. But its caller expects an error pointer and therefore continues to operate on a NULL skbuff. Signed-off-by: Mathias Krause Acked-by: Steffen Klassert Signed-off-by: David S. Miller --- net/xfrm/xfrm_user.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index dac08e2a5a93..d12b62547ad0 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1548,6 +1548,7 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, { struct xfrm_dump_info info; struct sk_buff *skb; + int err; skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) @@ -1558,9 +1559,10 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, info.nlmsg_seq = seq; info.nlmsg_flags = 0; - if (dump_one_policy(xp, dir, 0, &info) < 0) { + err = dump_one_policy(xp, dir, 0, &info); + if (err) { kfree_skb(skb); - return NULL; + return ERR_PTR(err); } return skb; -- 2.20.1