Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f26f7c480555812ca7c4037e0a50fa54afe2cb4a Commit: f26f7c480555812ca7c4037e0a50fa54afe2cb4a Parent: 56c99d0415e8b778c200f115b198c126243ec351 Author: Vlad Yasevich <[EMAIL PROTECTED]> AuthorDate: Thu Dec 6 22:50:27 2007 -0800 Committer: David S. Miller <[EMAIL PROTECTED]> CommitDate: Fri Dec 7 01:07:45 2007 -0800
[SCTP]: Add bind hash locking to the migrate code SCTP accept code tries to add a newliy created socket to a bind bucket without holding a lock. On a really busy system, that can causes slab corruptions. Add a lock around this code. Signed-off-by: Vlad Yasevich <[EMAIL PROTECTED]> Signed-off-by: David S. Miller <[EMAIL PROTECTED]> --- net/sctp/socket.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/net/sctp/socket.c b/net/sctp/socket.c index ff8bc95..9f5d793 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -6325,6 +6325,7 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, struct sctp_endpoint *newep = newsp->ep; struct sk_buff *skb, *tmp; struct sctp_ulpevent *event; + struct sctp_bind_hashbucket *head; int flags = 0; /* Migrate socket buffer sizes and all the socket level options to the @@ -6342,10 +6343,15 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, newsp->hmac = NULL; /* Hook this new socket in to the bind_hash list. */ + head = &sctp_port_hashtable[sctp_phashfn(inet_sk(oldsk)->num)]; + sctp_local_bh_disable(); + sctp_spin_lock(&head->lock); pp = sctp_sk(oldsk)->bind_hash; sk_add_bind_node(newsk, &pp->owner); sctp_sk(newsk)->bind_hash = pp; inet_sk(newsk)->num = inet_sk(oldsk)->num; + sctp_spin_unlock(&head->lock); + sctp_local_bh_enable(); /* Copy the bind_addr list from the original endpoint to the new * endpoint so that we can handle restarts properly - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html