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pimd: pimd crashes during neighbor clean up

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RCA:
It has asserted because during neighbor delete on a interface,
pim_number_of_nonlandelay_neighbors count has become less less than 0.
This was due to not updating the count when hello option changed.

Fix:
During hello option update, check and increment or decrement when this option changes.

Signed-off-by: Saravanan K <saravanank@vmware.com>
This commit is contained in:
saravanank 2020-03-17 19:22:57 -07:00
parent 7f2ccbe562
commit b3a474d82e
1 changed files with 11 additions and 0 deletions
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11
pimd/pim_neighbor.c
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@ -779,6 +779,7 @@ void pim_neighbor_update(struct pim_neighbor *neigh,
uint32_t dr_priority, struct list *addr_list)
{
struct pim_interface *pim_ifp = neigh->interface->info;
uint32_t old, new;
/* Received holdtime ? */
if (PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_HOLDTIME)) {
@ -818,6 +819,16 @@ void pim_neighbor_update(struct pim_neighbor *neigh,
neigh->prefix_list = addr_list;
update_dr_priority(neigh, hello_options, dr_priority);
new = PIM_OPTION_IS_SET(hello_options, PIM_OPTION_MASK_LAN_PRUNE_DELAY);
old = PIM_OPTION_IS_SET(neigh->hello_options,
PIM_OPTION_MASK_LAN_PRUNE_DELAY);
if (old != new) {
if (old)
++pim_ifp->pim_number_of_nonlandelay_neighbors;
else
--pim_ifp->pim_number_of_nonlandelay_neighbors;
}
/*
Copy flags
*/