4.4-stable review patch. If anyone has any objections, please let me know.
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From: YueHaibing yuehaibing@huawei.com
[ Upstream commit 64119e05f7b31e83e2555f6782e6cdc8f81c63f4 ]
Add a missing rcu_read_unlock in the error path
Fixes: c95567c80352 ("caif: added check for potential null return") Signed-off-by: YueHaibing yuehaibing@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/caif/caif_dev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/caif/caif_dev.c +++ b/net/caif/caif_dev.c @@ -131,8 +131,10 @@ static void caif_flow_cb(struct sk_buff caifd = caif_get(skb->dev);
WARN_ON(caifd == NULL); - if (caifd == NULL) + if (!caifd) { + rcu_read_unlock(); return; + }
caifd_hold(caifd); rcu_read_unlock();