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| author | Guillaume Nault <g.nault@alphalink.fr> | 2017-08-25 16:51:42 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-28 11:34:58 -0700 |
| commit | bb0a32ce4389e17e47e198d2cddaf141561581ad (patch) | |
| tree | 9da4476f4f4c705441368f0d4c0c4a9edb7b2c74 /net/l2tp | |
| parent | 54652eb12c1b72e9602d09cb2821d5760939190f (diff) | |
| download | linux-stable-bb0a32ce4389e17e47e198d2cddaf141561581ad.tar.gz linux-stable-bb0a32ce4389e17e47e198d2cddaf141561581ad.tar.bz2 linux-stable-bb0a32ce4389e17e47e198d2cddaf141561581ad.zip | |
l2tp: hold tunnel while processing genl delete command
l2tp_nl_cmd_tunnel_delete() needs to take a reference on the tunnel, to
prevent it from being concurrently freed by l2tp_tunnel_destruct().
Fixes: 309795f4bec2 ("l2tp: Add netlink control API for L2TP")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp')
| -rw-r--r-- | net/l2tp/l2tp_netlink.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c index 27ee94b5c189..808966550620 100644 --- a/net/l2tp/l2tp_netlink.c +++ b/net/l2tp/l2tp_netlink.c @@ -273,8 +273,8 @@ static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info } tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]); - tunnel = l2tp_tunnel_find(net, tunnel_id); - if (tunnel == NULL) { + tunnel = l2tp_tunnel_get(net, tunnel_id); + if (!tunnel) { ret = -ENODEV; goto out; } @@ -284,6 +284,8 @@ static int l2tp_nl_cmd_tunnel_delete(struct sk_buff *skb, struct genl_info *info (void) l2tp_tunnel_delete(tunnel); + l2tp_tunnel_dec_refcount(tunnel); + out: return ret; } |