Sean Tranchetti 7694654168 net: ipv6: fib: flush exceptions when purging route ... [ Upstream commit d8f5c29653 ] Route removal is handled by two code paths. The main removal path is via fib6_del_route() which will handle purging any PMTU exceptions from the cache, removing all per-cpu copies of the DST entry used by the route, and releasing the fib6_info struct. The second removal location is during fib6_add_rt2node() during a route replacement operation. This path also calls fib6_purge_rt() to handle cleaning up the per-cpu copies of the DST entries and releasing the fib6_info associated with the older route, but it does not flush any PMTU exceptions that the older route had. Since the older route is removed from the tree during the replacement, we lose any way of accessing it again. As these lingering DSTs and the fib6_info struct are holding references to the underlying netdevice struct as well, unregistering that device from the kernel can never complete. Fixes: 2b760fcf5c ("ipv6: hook up exception table to store dst cache") Signed-off-by: Sean Tranchetti <stranche@codeaurora.org> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/1609892546-11389-1-git-send-email-stranche@quicinc.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-01-17 14:05:31 +01:00
..
ila	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
netfilter	netfilter: x_tables: Update remaining dereference to RCU	2021-01-12 20:16:24 +01:00
Kconfig	net: ipv6: fix kconfig dependency warning for IPV6_SEG6_HMAC	2020-09-26 18:03:13 +02:00
Makefile	xfrm: make xfrm modes builtin	2019-04-08 09:15:17 +02:00
addrconf.c	ipv6: Fix error path to cancel the meseage	2020-11-24 13:28:56 +01:00
addrconf_core.c	net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup	2019-12-18 16:08:42 +01:00
addrlabel.c	ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init	2020-12-08 10:40:23 +01:00
af_inet6.c	net: ipv6_stub: use ip6_dst_lookup_flow instead of ip6_dst_lookup	2019-12-18 16:08:42 +01:00
ah6.c	ah6: fix error return code in ah6_input()	2020-11-24 13:28:55 +01:00
anycast.c	ipv6: fix memory leaks on IPV6_ADDRFORM path	2020-08-11 15:33:39 +02:00
calipso.c	netlabel: cope with NULL catmap	2020-05-20 08:20:08 +02:00
datagram.c	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
esp6.c	xfrm: remove get_mtu indirection from xfrm_type	2019-07-01 06:16:40 +02:00
esp6_offload.c	esp6: get the right proto for transport mode in esp6_gso_encap	2020-06-03 08:21:35 +02:00
exthdrs.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
exthdrs_core.c	ipv6: remove printk	2019-07-27 14:23:48 -07:00
exthdrs_offload.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
fib6_notifier.c	net: Add module reference to FIB notifiers	2017-09-01 20:33:42 -07:00
fib6_rules.c	ipv6: do not free rt if FIB_LOOKUP_NOREF is set on suppress rule	2019-09-26 09:34:25 +02:00
fou6.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
icmp.c	ip: Fix SO_MARK in RST, ACK and ICMP packets	2020-07-22 09:32:50 +02:00
inet6_connection_sock.c	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
inet6_hashtables.c	net: annotate accesses to sk->sk_incoming_cpu	2019-10-30 13:24:25 -07:00
ip6_checksum.c	net: udp: fix handling of CHECKSUM_COMPLETE packets	2018-10-24 14:18:16 -07:00
ip6_fib.c	net: ipv6: fib: flush exceptions when purging route	2021-01-17 14:05:31 +01:00
ip6_flowlabel.c	ipv6: fix static key imbalance in fl_create()	2019-07-11 14:43:25 -07:00
ip6_gre.c	net: ip6_gre: set dev->hard_header_len when using header_ops	2020-12-08 10:40:26 +01:00
ip6_icmp.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ip6_input.c	ipv6: drop incoming packets having a v4mapped source address	2019-10-03 11:40:21 -04:00
ip6_offload.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
ip6_offload.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
ip6_output.c	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
ip6_tunnel.c	gre6: Fix reception with IP6_TNL_F_RCV_DSCP_COPY	2020-09-03 11:26:39 +02:00
ip6_udp_tunnel.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
ip6_vti.c	vti6: Fix memory leak of skb if input policy check fails	2020-04-01 11:02:12 +02:00
ip6mr.c	net: don't return invalid table id error when we fall back to PF_UNSPEC	2020-06-03 08:20:41 +02:00
ipcomp6.c	xfrm: remove type and offload_type map from xfrm_state_afinfo	2019-06-06 08:34:50 +02:00
ipv6_sockglue.c	ipv6: fix memory leaks on IPV6_ADDRFORM path	2020-08-11 15:33:39 +02:00
mcast.c	mld: fix memory leak in ipv6_mc_destroy_dev()	2020-06-30 15:36:43 -04:00
mcast_snoop.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 343	2019-06-05 17:37:07 +02:00
mip6.c	xfrm: remove type and offload_type map from xfrm_state_afinfo	2019-06-06 08:34:50 +02:00
ndisc.c	Exempt multicast addresses from five-second neighbor lifetime	2020-11-24 13:28:56 +01:00
netfilter.c	netfilter: use actual socket sk rather than skb sk when routing harder	2020-11-18 19:20:17 +01:00
output_core.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
ping.c	ipv6: Fix the link time qualifier of 'ping_v6_proc_exit_net()'	2019-09-12 11:20:33 +01:00
proc.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-07 11:00:14 -07:00
protocol.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
raw.c	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
reassembly.c	inet: frags: re-introduce skb coalescing for local delivery	2019-08-08 15:55:10 -07:00
route.c	ipv6: Fix nexthop refcnt leak when creating ipv6 route info	2020-08-11 15:33:39 +02:00
seg6.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
seg6_hmac.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
seg6_iptunnel.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
seg6_local.c	ipv6: sr: remove SKB_GSO_IPXIP6 on End.D* actions	2020-01-29 16:45:20 +01:00
sit.c	IPv6: Set SIT tunnel hard_header_len to zero	2020-11-18 19:20:32 +01:00
syncookies.c	net: Update window_clamp if SOCK_RCVBUF is set	2020-11-18 19:20:32 +01:00
sysctl_net_ipv6.c	ipv6: Fix sysctl max for fib_multipath_hash_policy	2020-09-12 14:18:55 +02:00
tcp_ipv6.c	net: ipv6: add net argument to ip6_dst_lookup_flow	2019-12-18 16:08:40 +01:00
tcpv6_offload.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
tunnel6.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13	2019-05-21 11:28:45 +02:00
udp.c	udp: Improve load balancing for SO_REUSEPORT.	2020-07-31 18:39:31 +02:00
udp_impl.h	udp6: add missing rehash callback to udplite	2019-01-17 15:01:08 -08:00
udp_offload.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
udplite.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
xfrm6_input.c	net: use skb_sec_path helper in more places	2018-12-19 11:21:37 -08:00
xfrm6_output.c	xfrm: Always set XFRM_TRANSFORMED in xfrm{4,6}_output_finish	2020-04-29 16:33:11 +02:00
xfrm6_policy.c	net: add bool confirm_neigh parameter for dst_ops.update_pmtu	2020-01-04 19:18:58 +01:00
xfrm6_protocol.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
xfrm6_state.c	xfrm: remove eth_proto value from xfrm_state_afinfo	2019-06-06 08:34:50 +02:00
xfrm6_tunnel.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13	2019-05-21 11:28:45 +02:00