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| author | Mathias Krause <minipli@googlemail.com> | 2012-09-14 13:58:32 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 00:28:04 +0400 |
| commit | 182d22d51bc2f57cded9eed61dbbcfb82b87da1c (patch) | |
| tree | 775fc67794c6909379ba642d616742b9e80654a6 | |
| parent | 66c41c804c27187c20f1c29aed3216caf69cca4f (diff) | |
| download | linux-182d22d51bc2f57cded9eed61dbbcfb82b87da1c.tar.xz | |
xfrm_user: return error pointer instead of NULL #2
[ Upstream commit c25463722509fef0ed630b271576a8c9a70236f3 ]
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 <minipli@googlemail.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/xfrm/xfrm_user.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index dbd285252027..59801cedd09c 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1531,6 +1531,7 @@ 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) @@ -1541,9 +1542,10 @@ 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; |