diff options
| author | Thomas Graf <tgraf@redhat.com> | 2012-12-06 09:25:04 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-07 14:15:04 -0500 |
| commit | 0b0fe913bf6d551642eb8892ed90be7358906379 (patch) | |
| tree | cd119f956cd2b9428a16836020a80772b877f18b | |
| parent | 36f0ffa59175883bf2b01b38a60384314368aae9 (diff) | |
| download | blackbird-op-linux-0b0fe913bf6d551642eb8892ed90be7358906379.tar.gz blackbird-op-linux-0b0fe913bf6d551642eb8892ed90be7358906379.zip | |
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>
| -rw-r--r-- | net/sctp/proc.c | 7 |
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. */ |
