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| author | Eric Dumazet <edumazet@google.com> | 2015-01-21 03:45:42 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-01-26 00:44:08 -0800 |
| commit | 1dc7b90f7cd050ef6d5e511e652347e52874469c (patch) | |
| tree | 5362ed5e14526d303ba83fc1f596f69fb63933ba /lib | |
| parent | 607954b084d4ad5e6a2e0f795de7803d9c6ae37f (diff) | |
| download | lwn-1dc7b90f7cd050ef6d5e511e652347e52874469c.tar.gz lwn-1dc7b90f7cd050ef6d5e511e652347e52874469c.zip | |
ipv6: tcp: fix race in IPV6_2292PKTOPTIONS
IPv6 TCP sockets store in np->pktoptions skbs, and use skb_set_owner_r()
to charge the skb to socket.
It means that destructor must be called while socket is locked.
Therefore, we cannot use skb_get() or atomic_inc(&skb->users)
to protect ourselves : kfree_skb() might race with other users
manipulating sk->sk_forward_alloc
Fix this race by holding socket lock for the duration of
ip6_datagram_recv_ctl()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions