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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-09-16 16:02:12 -0700
committerDavid S. Miller <davem@davemloft.net>2007-09-16 16:02:12 -0700
commit293035479942400a7fe8e4f72465d4e4e466b91a (patch)
treeaf9890403a554b4cf8389a9116080a0d1aa187fb /net/sctp/bind_addr.c
parentddeee3ce7fbf0e800f2a26a76d6018b42b337cc2 (diff)
downloadlinux-293035479942400a7fe8e4f72465d4e4e466b91a.tar.bz2
[SCTP]: Add RCU synchronization around sctp_localaddr_list
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>
Diffstat (limited to 'net/sctp/bind_addr.c')
-rw-r--r--net/sctp/bind_addr.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c
index fdb287a9e2e2..7fc369f9035d 100644
--- a/net/sctp/bind_addr.c
+++ b/net/sctp/bind_addr.c
@@ -163,8 +163,10 @@ int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new,
addr->a.v4.sin_port = htons(bp->port);
addr->use_as_src = use_as_src;
+ addr->valid = 1;
INIT_LIST_HEAD(&addr->list);
+ INIT_RCU_HEAD(&addr->rcu);
list_add_tail(&addr->list, &bp->address_list);
SCTP_DBG_OBJCNT_INC(addr);