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Fix panic when destroying interface with ECMP routes.

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Reported by:	Zhenlei Huang <zlei.huang at gmail.com>
PR:		254496
MFC after:	immediately
This commit is contained in:
Alexander V. Chernikov 2021-03-23 22:00:04 +00:00
parent 82ee386c2a
commit a0308e48ec
1 changed files with 10 additions and 1 deletions
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11
sys/net/route/route_ctl.c
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@ -130,13 +130,22 @@ vnet_rtzone_destroy()
static void
destroy_rtentry(struct rtentry *rt)
{
struct nhop_object *nh = rt->rt_nhop;
/*
* At this moment rnh, nh_control may be already freed.
* nhop interface may have been migrated to a different vnet.
* Use vnet stored in the nexthop to delete the entry.
*/
CURVNET_SET(nhop_get_vnet(rt->rt_nhop));
#ifdef ROUTE_MPATH
if (NH_IS_NHGRP(nh)) {
struct weightened_nhop *wn;
uint32_t num_nhops;
wn = nhgrp_get_nhops((struct nhgrp_object *)nh, &num_nhops);
nh = wn[0].nh;
}
#endif
CURVNET_SET(nhop_get_vnet(nh));
/* Unreference nexthop */
nhop_free_any(rt->rt_nhop);