diff options
| author | saravanank <saravanank@vmware.com> | 2020-03-24 01:26:25 -0700 |
|---|---|---|
| committer | saravanank <saravanank@vmware.com> | 2020-03-24 01:39:28 -0700 |
| commit | c783249bb5d9058ab7f378fb13528b3dcbdf3252 (patch) | |
| tree | 9afe907424d571e8b8abc326fa3a0c47d09ba45a /pimd/pim_mroute.c | |
| parent | 7f2ccbe562cae49fb8bf1770a0ec79b701ee41af (diff) | |
pimd: avoiding crash in wrvifwhole path
Observed crash in the wrvif whole path.
RCA: Wrongvif path trying to access pim attributes of pim disabled RPF interface.
This was resulting in Null access.
(gdb) p/x rpf->source_nexthop
$19 = {last_lookup = {s_addr = 0xa282828}, last_lookup_time = 0x59c0de0828c98,
interface = 0x1013e5011300, mrib_nexthop_addr = {family = 0x2,
prefixlen = 0x20, u = {prefix = 0x28, prefix4 = {s_addr = 0xa282828},
prefix6 = {__in6_u = {__u6_addr8 = {0x28, 0x28, 0x28, 0xa,
0x0 <repeats 12 times>}, __u6_addr16 = {0x2828, 0xa28, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0}, __u6_addr32 = {0xa282828, 0x0, 0x0, 0x0}}},
lp = {id = {s_addr = 0xa282828}, adv_router = {s_addr = 0x0}},
prefix_eth = {octet = {0x28, 0x28, 0x28, 0xa, 0x0, 0x0}}, val = {0x28,
0x28, 0x28, 0xa, 0x0 <repeats 12 times>}, ptr = 0xa282828,
prefix_evpn = {route_type = 0x28, u = {_ead_addr = {esi = {val = {0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}, eth_tag = 0x0},
_macip_addr = {eth_tag = 0x0, ip_prefix_length = 0x0, mac = {
octet = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}, ip = {ipa_type = 0x0,
ip = {addr = 0x0, _v4_addr = {s_addr = 0x0}, _v6_addr = {
__in6_u = {__u6_addr8 = {0x0 <repeats 16 times>},
__u6_addr16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
__u6_addr32 = {0x0, 0x0, 0x0, 0x0}}}}}}, _imet_addr = {
eth_tag = 0x0, ip_prefix_length = 0x0, ip = {ipa_type = 0x0, ip = {
addr = 0x0, _v4_addr = {s_addr = 0x0}, _v6_addr = {__in6_u = {
__u6_addr8 = {0x0 <repeats 16 times>}, __u6_addr16 = {0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, __u6_addr32 = {0x0,
0x0, 0x0, 0x0}}}}}}, _es_addr = {esi = {val = {0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}},
---Type <return> to continue, or q <return> to quit---q
ip_prefix_length = 0x0Quit
(gdb) p/x rpf->source_nexthop.interface
$20 = 0x1013e5011300
(gdb) p/x rpf->source_nexthop.interface->info
$21 = 0x0 <======================== Pim & Igmp is disabled on this interface
Fix: Return when the rpf interface is not pim enabled
Signed-off-by: Saravanan K <saravanank@vmware.com>
Diffstat (limited to 'pimd/pim_mroute.c')
| -rw-r--r-- | pimd/pim_mroute.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/pimd/pim_mroute.c b/pimd/pim_mroute.c index f366fdbe79..440b256b26 100644 --- a/pimd/pim_mroute.c +++ b/pimd/pim_mroute.c @@ -484,7 +484,10 @@ static int pim_mroute_msg_wrvifwhole(int fd, struct interface *ifp, struct pim_upstream *parent; struct pim_nexthop source; struct pim_rpf *rpf = RP(pim_ifp->pim, sg.grp); - if (!rpf || !rpf->source_nexthop.interface) + + /* No RPF or No RPF interface or No mcast on RPF interface */ + if (!rpf || !rpf->source_nexthop.interface + || !rpf->source_nexthop.interface->info) return 0; /* |