diff options
author | Florian Westphal <fw@strlen.de> | 2015-12-31 14:26:33 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-28 21:49:33 -0800 |
commit | 644acb9f488360cb40653f027dc5278021ed1383 (patch) | |
tree | 15fb87026637338376dd7acc9a5f4630e514458f | |
parent | 4a3411cc43643e671f885fb505a48b43564bc6d5 (diff) |
connector: bump skb->users before callback invocation
[ Upstream commit 55285bf09427c5abf43ee1d54e892f352092b1f1 ]
Dmitry reports memleak with syskaller program.
Problem is that connector bumps skb usecount but might not invoke callback.
So move skb_get to where we invoke the callback.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/connector/connector.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c index 0daa11e418b1..bdbd80415908 100644 --- a/drivers/connector/connector.c +++ b/drivers/connector/connector.c @@ -154,26 +154,21 @@ static int cn_call_callback(struct sk_buff *skb) * * It checks skb, netlink header and msg sizes, and calls callback helper. */ -static void cn_rx_skb(struct sk_buff *__skb) +static void cn_rx_skb(struct sk_buff *skb) { struct nlmsghdr *nlh; - struct sk_buff *skb; int len, err; - skb = skb_get(__skb); - if (skb->len >= NLMSG_HDRLEN) { nlh = nlmsg_hdr(skb); len = nlmsg_len(nlh); if (len < (int)sizeof(struct cn_msg) || skb->len < nlh->nlmsg_len || - len > CONNECTOR_MAX_MSG_SIZE) { - kfree_skb(skb); + len > CONNECTOR_MAX_MSG_SIZE) return; - } - err = cn_call_callback(skb); + err = cn_call_callback(skb_get(skb)); if (err < 0) kfree_skb(skb); } |