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BFD: Fixes crash after socket error

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Thanks to Thomas King for the bugreport.
This commit is contained in:
Ondrej Zajicek 2015-07-19 11:39:24 +02:00
parent a8ad8fd649
commit ffa398b8d8
2 changed files with 22 additions and 14 deletions
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10
proto/bfd/bfd.c
View file

@ -43,7 +43,7 @@
* the needs of BFD sessions. When a new session is created, it requests a * the needs of BFD sessions. When a new session is created, it requests a
* proper BFD interface by function bfd_get_iface(), which either finds an * proper BFD interface by function bfd_get_iface(), which either finds an
* existing one in &iface_list (from &bfd_proto) or allocates a new one. When a * existing one in &iface_list (from &bfd_proto) or allocates a new one. When a
* session is removed, an associated iface is dicharged by bfd_free_iface(). * session is removed, an associated iface is discharged by bfd_free_iface().
* *
* BFD requests are the external API for the other protocols. When a protocol * BFD requests are the external API for the other protocols. When a protocol
* wants a BFD session, it calls bfd_request_session(), which creates a * wants a BFD session, it calls bfd_request_session(), which creates a
@ -575,9 +575,13 @@ bfd_free_iface(struct bfd_iface *ifa)
if (!ifa || --ifa->uc) if (!ifa || --ifa->uc)
return; return;
rem_node(&ifa->n); if (ifa->sk)
{
sk_stop(ifa->sk); sk_stop(ifa->sk);
rfree(ifa->sk); rfree(ifa->sk);
}
rem_node(&ifa->n);
mb_free(ifa); mb_free(ifa);
} }
@ -1092,7 +1096,7 @@ bfd_show_sessions(struct proto *P)
/* FIXME: this is thread-unsafe, but perhaps harmless */ /* FIXME: this is thread-unsafe, but perhaps harmless */
state = s->loc_state; state = s->loc_state;
diag = s->loc_diag; diag = s->loc_diag;
ifname = (s->ifa && s->ifa->sk->iface) ? s->ifa->sk->iface->name : "---"; ifname = (s->ifa && s->ifa->iface) ? s->ifa->iface->name : "---";
tx_int = s->last_tx ? (MAX(s->des_min_tx_int, s->rem_min_rx_int) TO_MS) : 0; tx_int = s->last_tx ? (MAX(s->des_min_tx_int, s->rem_min_rx_int) TO_MS) : 0;
timeout = (MAX(s->req_min_rx_int, s->rem_min_tx_int) TO_MS) * s->rem_detect_mult; timeout = (MAX(s->req_min_rx_int, s->rem_min_tx_int) TO_MS) * s->rem_detect_mult;

6
proto/bfd/packets.c
View file

@ -63,9 +63,13 @@ void
bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final) bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final)
{ {
sock *sk = s->ifa->sk; sock *sk = s->ifa->sk;
struct bfd_ctl_packet *pkt = (struct bfd_ctl_packet *) sk->tbuf; struct bfd_ctl_packet *pkt;
char fb[8]; char fb[8];
if (!sk)
return;
pkt = (struct bfd_ctl_packet *) sk->tbuf;
pkt->vdiag = bfd_pack_vdiag(1, s->loc_diag); pkt->vdiag = bfd_pack_vdiag(1, s->loc_diag);
pkt->flags = bfd_pack_flags(s->loc_state, 0); pkt->flags = bfd_pack_flags(s->loc_state, 0);
pkt->detect_mult = s->detect_mult; pkt->detect_mult = s->detect_mult;