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authorThomas Graf <tgraf@redhat.com>2012-12-06 09:25:04 +0000
committerDavid S. Miller <davem@davemloft.net>2012-12-07 14:15:04 -0500
commit0b0fe913bf6d551642eb8892ed90be7358906379 (patch)
treecd119f956cd2b9428a16836020a80772b877f18b /net
parent36f0ffa59175883bf2b01b38a60384314368aae9 (diff)
sctp: proc: protect bind_addr->address_list accesses with rcu_read_lock()
address_list is protected via the socket lock or RCU. Since we don't want to take the socket lock for each assoc we dump in procfs a RCU read-side critical section must be entered. V2: Skip local addresses marked as dead Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Vlad Yasevich <vyasevic@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/proc.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index 9966e7b16451..06b05ee17d8d 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -139,7 +139,11 @@ static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_commo
primary = &peer->saddr;
}
- list_for_each_entry(laddr, &epb->bind_addr.address_list, list) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
+ if (!laddr->valid)
+ continue;
+
addr = &laddr->a;
af = sctp_get_af_specific(addr->sa.sa_family);
if (primary && af->cmp_addr(addr, primary)) {
@@ -147,6 +151,7 @@ static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_commo
}
af->seq_dump_addr(seq, addr);
}
+ rcu_read_unlock();
}
/* Dump remote addresses of an association. */