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[SCTP]: Add RCU synchronization around sctp_localaddr_list

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sctp_localaddr_list is modified dynamically via NETDEV_UP
and NETDEV_DOWN events, but there is not synchronization
between writer (even handler) and readers.  As a result,
the readers can access an entry that has been freed and
crash the sytem.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Sridhar Samdurala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich
2007-09-16 16:02:12 -07:00
committed by David S. Miller
parent ddeee3ce7f
commit 2930354799
6 changed files with 97 additions and 38 deletions
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1
include/net/sctp/sctp.h
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@@ -123,6 +123,7 @@
* sctp/protocol.c
*/
extern struct sock *sctp_get_ctl_sock(void);
extern void sctp_local_addr_free(struct rcu_head *head);
extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
sctp_scope_t, gfp_t gfp,
int flags);