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[SCTP]: Fix couple of races between sctp_peeloff() and sctp_rcv().

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Validate and update the sk in sctp_rcv() to avoid the race where an
assoc/ep could move to a different socket after we get the sk, but before
the skb is added to the backlog.

Also migrate the skb's in backlog queue to new sk when doing a peeloff.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
This commit is contained in:
Sridhar Samudrala 2006-01-17 11:56:26 -08:00
parent 313e7b4d25
commit c4d2444e99
3 changed files with 40 additions and 1 deletions
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4
net/sctp/socket.c
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@ -5602,8 +5602,12 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
*/
newsp->type = type;
spin_lock_bh(&oldsk->sk_lock.slock);
/* Migrate the backlog from oldsk to newsk. */
sctp_backlog_migrate(assoc, oldsk, newsk);
/* Migrate the association to the new socket. */
sctp_assoc_migrate(assoc, newsk);
spin_unlock_bh(&oldsk->sk_lock.slock);
/* If the association on the newsk is already closed before accept()
* is called, set RCV_SHUTDOWN flag.