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| author | Daniel Borkmann <dborkman@redhat.com> | 2013-06-14 18:24:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-14 15:38:36 -0700 |
| commit | f9e42b853523cda0732022c2e0473c183f7aec65 (patch) | |
| tree | 2fafd6347ab04c066b51759d0e85cc53a7378d35 /net/sctp | |
| parent | 09ce069dff607f86dcdeb541d20734a8f42478c5 (diff) | |
| download | blackbird-op-linux-f9e42b853523cda0732022c2e0473c183f7aec65.tar.gz blackbird-op-linux-f9e42b853523cda0732022c2e0473c183f7aec65.zip | |
net: sctp: sideeffect: throw BUG if primary_path is NULL
This clearly states a BUG somewhere in the SCTP code as e.g. fixed once
in f28156335 ("sctp: Use correct sideffect command in duplicate cookie
handling"). If this ever happens, throw a trace in the sideeffect engine
where assocs clearly must have a primary_path assigned.
When in sctp_seq_dump_local_addrs() also throw a WARN and bail out since
we do not need to panic for printing this one asterisk. Also, it will
avoid the not so obvious case when primary != NULL test passes and at a
later point in time triggering a NULL ptr dereference caused by primary.
While at it, also fix up the white space.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/proc.c | 12 | ||||
| -rw-r--r-- | net/sctp/sm_sideeffect.c | 5 |
2 files changed, 13 insertions, 4 deletions
diff --git a/net/sctp/proc.c b/net/sctp/proc.c index 4e45ee35d0db..0c83162a6bf8 100644 --- a/net/sctp/proc.c +++ b/net/sctp/proc.c @@ -134,9 +134,15 @@ static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_commo struct sctp_af *af; if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { - asoc = sctp_assoc(epb); - peer = asoc->peer.primary_path; - primary = &peer->saddr; + asoc = sctp_assoc(epb); + + peer = asoc->peer.primary_path; + if (unlikely(peer == NULL)) { + WARN(1, "Association %p with NULL primary path!", asoc); + return; + } + + primary = &peer->saddr; } rcu_read_lock(); diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c index 8aab894aeabe..ff91f47b0239 100644 --- a/net/sctp/sm_sideeffect.c +++ b/net/sctp/sm_sideeffect.c @@ -864,6 +864,7 @@ static void sctp_cmd_delete_tcb(sctp_cmd_seq_t *cmds, (!asoc->temp) && (sk->sk_shutdown != SHUTDOWN_MASK)) return; + BUG_ON(asoc->peer.primary_path == NULL); sctp_unhash_established(asoc); sctp_association_free(asoc); } @@ -1274,8 +1275,10 @@ static int sctp_cmd_interpreter(sctp_event_t event_type, sctp_outq_uncork(&asoc->outqueue); local_cork = 0; } - asoc = cmd->obj.asoc; + /* Register with the endpoint. */ + asoc = cmd->obj.asoc; + BUG_ON(asoc->peer.primary_path == NULL); sctp_endpoint_add_asoc(ep, asoc); sctp_hash_established(asoc); break; |
