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6lowpan: ndisc: fix double read unlock 

This patch removes a double unlock case to accessing neighbour private
data.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2016-06-21 10:27:18 +02:00 committed by Marcel Holtmann
parent a4770e1117
commit 929946a471
1 changed files with 2 additions and 1 deletions
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3
net/6lowpan/ndisc.c
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@ -135,8 +135,9 @@ static int lowpan_ndisc_opt_addr_space(const struct net_device *dev,
read_unlock_bh(&neigh->lock);
addr_space += __ndisc_opt_addr_space(IEEE802154_SHORT_ADDR_LEN, 0);
*ha = ha_buf;
} else {
read_unlock_bh(&neigh->lock);
}
read_unlock_bh(&neigh->lock);
break;
case NDISC_NEIGHBOUR_ADVERTISEMENT:
case NDISC_NEIGHBOUR_SOLICITATION: