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Plug loopback idaddr refcount leak.

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Reviewed by:	markj
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D22980
This commit is contained in:
Alexander V. Chernikov 2020-01-02 09:08:45 +00:00
parent eb51967b50
commit 5fcb2832e3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=356268
1 changed files with 8 additions and 3 deletions
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11
sys/net/if.c
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@ -1836,6 +1836,7 @@ ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
struct rt_addrinfo info;
struct sockaddr_dl null_sdl;
struct ifnet *ifp;
struct ifaddr *rti_ifa = NULL;
ifp = ifa->ifa_ifp;
@ -1846,9 +1847,10 @@ ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
/* explicitly specify (loopback) ifa */
if (info.rti_ifp != NULL) {
NET_EPOCH_ENTER(et);
info.rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
if (info.rti_ifa != NULL)
ifa_ref(info.rti_ifa);
rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
if (rti_ifa != NULL)
ifa_ref(rti_ifa);
info.rti_ifa = rti_ifa;
NET_EPOCH_EXIT(et);
}
}
@ -1859,6 +1861,9 @@ ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
if (rti_ifa != NULL)
ifa_free(rti_ifa);
if (error != 0 &&
!(cmd == RTM_ADD && error == EEXIST) &&
!(cmd == RTM_DELETE && error == ENOENT))