- 16 4月, 2019 1 次提交
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由 Jonathan Lemon 提交于
When __ip6_rt_update_pmtu() is called, rt->from is RCU dereferenced, but is never checked for null - rt6_flush_exceptions() may have removed the entry. [ 1913.989004] RIP: 0010:ip6_rt_cache_alloc+0x13/0x170 [ 1914.209410] Call Trace: [ 1914.214798] <IRQ> [ 1914.219226] __ip6_rt_update_pmtu+0xb0/0x190 [ 1914.228649] ip6_tnl_xmit+0x2c2/0x970 [ip6_tunnel] [ 1914.239223] ? ip6_tnl_parse_tlv_enc_lim+0x32/0x1a0 [ip6_tunnel] [ 1914.252489] ? __gre6_xmit+0x148/0x530 [ip6_gre] [ 1914.262678] ip6gre_tunnel_xmit+0x17e/0x3c7 [ip6_gre] [ 1914.273831] dev_hard_start_xmit+0x8d/0x1f0 [ 1914.283061] sch_direct_xmit+0xfa/0x230 [ 1914.291521] __qdisc_run+0x154/0x4b0 [ 1914.299407] net_tx_action+0x10e/0x1f0 [ 1914.307678] __do_softirq+0xca/0x297 [ 1914.315567] irq_exit+0x96/0xa0 [ 1914.322494] smp_apic_timer_interrupt+0x68/0x130 [ 1914.332683] apic_timer_interrupt+0xf/0x20 [ 1914.341721] </IRQ> Fixes: a68886a6 ("net/ipv6: Make from in rt6_info rcu protected") Signed-off-by: NJonathan Lemon <jonathan.lemon@gmail.com> Reviewed-by: NEric Dumazet <edumazet@google.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NMartin KaFai Lau <kafai@fb.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 13 4月, 2019 1 次提交
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由 David Ahern 提交于
In the review of 0b34eb00 ("ipv6: Refactor __ip6_route_redirect"), Martin noted that the flowi6_oif compare is moved to the new helper and should be removed from __ip6_route_redirect. Fix the oversight. Fixes: 0b34eb00 ("ipv6: Refactor __ip6_route_redirect") Reported-by: NMartin Lau <kafai@fb.com> Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 12 4月, 2019 10 次提交
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由 David Ahern 提交于
Move the nexthop evaluation of a fib entry to a helper that can be leveraged for each fib6_nh in a multipath nexthop object. In the move, 'continue' statements means the helper returns false (loop should continue) and 'break' means return true (found the entry of interest). Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Move the device and gateway checks in the fib6_next loop to a helper that can be called per fib6_nh entry. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Move the siblings and fib6_multipath_select after the null entry check since a null entry can not have siblings. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Clean up the fib6_null_entry handling in ip6_pol_route_lookup. rt6_device_match can return fib6_null_entry, but fib6_multipath_select can not. Consolidate the fib6_null_entry handling and on the final null_entry check set rt and goto out - no need to defer to a second check after rt6_find_cached_rt. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
find_rr_leaf has 3 loops over fib_entries calling find_match. The loops are very similar with differences in start point and whether the metric is evaluated: 1. start at rr_head, no extra loop compare, check fib metric 2. start at leaf, compare rt against rr_head, check metric 3. start at cont (potential saved point from earlier loops), no extra loop compare, no metric check Create 1 loop that is called 3 different times. This will make a later change with multipath nexthop objects much simpler. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
find_match primarily needs a fib6_nh (and fib6_flags which it passes through to rt6_score_route). Move fib6_check_expired up to the call sites so find_match is only called for relevant entries. Remove the match argument which is mostly a pass through and use the return boolean to decide if match gets set in the call sites. The end result is a helper that can be called per fib6_nh struct which is needed once fib entries reference nexthop objects that have more than one fib6_nh. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
rt6_score_route only needs the fib6_flags and nexthop data. Change it accordingly. Allows re-use later for nexthop based fib6_nh. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
rt6_probe sends probes for gateways in a nexthop. As such it really depends on a fib6_nh, not a fib entry. Move last_probe to fib6_nh and update rt6_probe to a fib6_nh struct. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
rt6_check_dev is a simpler helper with only 1 caller. Fold the code into rt6_score_route. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Change rt6_check_neigh to take a fib6_nh instead of a fib entry. Move the check on fib_flags and whether the nexthop has a gateway up to the one caller. Remove the inline from the definition as well. Not necessary. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 09 4月, 2019 1 次提交
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由 David Ahern 提交于
Allow the gateway in a fib_nh_common to be from a different address family than the outer fib{6}_nh. To that end, replace nhc_has_gw with nhc_gw_family and update users of nhc_has_gw to check nhc_gw_family. Now nhc_family is used to know if the nh_common is part of a fib_nh or fib6_nh (used for container_of to get to route family specific data), and nhc_gw_family represents the address family for the gateway. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 04 4月, 2019 1 次提交
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由 David Ahern 提交于
Export fib_nexthop_info and fib_add_nexthop for use by IPv6 code. Remove rt6_nexthop_info and rt6_add_nexthop in favor of the IPv4 versions. Update fib_nexthop_info for IPv6 linkdown check and RTA_GATEWAY for AF_INET6. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Acked-by: NMartin KaFai Lau <kafai@fb.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 30 3月, 2019 8 次提交
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由 David Ahern 提交于
With fib_nh_common in place, move common initialization and release code into helpers used by both ipv4 and ipv6. For the moment, the init is just the lwt encap and the release is both the netdev reference and the the lwt state reference. More will be added later. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Acked-by: NAlexei Starovoitov <ast@kernel.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Add fib_nh_common struct with common nexthop attributes. Convert fib_nh and fib6_nh to use it. Use macros to move existing fib_nh_* references to the new nh_common.nhc_*. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Rename fib6_nh entries that will be moved to a fib_nh_common struct. Specifically, the device, gateway, flags, and lwtstate are common with all nexthop definitions. In some places new temporary variables are declared or local variables renamed to maintain line lengths. Rename only; no functional change intended. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
rt6_add_nexthop and rt6_nexthop_info only need the fib6_info for the gateway flag and the nexthop weight, and the presence of a gateway is now per-nexthop. Update the signatures to take a fib6_nh and nexthop weight and better align with the ipv4 versions. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
fib6_ignore_linkdown takes a fib6_info but only looks at the net_device and its IPv6 config. Change it to take a net_device over a fib6_info as its input argument. In addition, move it to a header file to make the check inline and usable later with IPv4 code without going through the ipv6 stub, and rename to ip6_ignore_linkdown since it is only checking the setting based on the ipv6 struct on a device. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
The gateway setting is not per fib6_info entry but per-fib6_nh. Add a new fib_nh_has_gw flag to fib6_nh and convert references to RTF_GATEWAY to the new flag. For IPv6 address the flag is cheaper than checking that nh_gw is non-0 like IPv4 does. While this increases fib6_nh by 8-bytes, the effective allocation size of a fib6_info is unchanged. The 8 bytes is recovered later with a fib_nh_common change. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Move the fib6_nh cleanup code to a new helper, fib6_nh_release. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Similar to IPv4, consolidate the fib6_nh initialization into a helper. As a new standalone function, add a cleanup path to put lwtstate on error. To avoid modifying fib6_config flags, move the reject check to a helper that is invoked once by fib6_nh_init to reset the device and then again in ip6_route_info_create to set the fib6_flags. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 22 3月, 2019 3 次提交
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由 David Ahern 提交于
net and null_fallback are redundant. Remove null_fallback in favor of !net check. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Acked-by: NWei Wang <weiwan@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
Change addrconf_f6i_alloc to generate a fib6_config and call ip6_route_info_create. addrconf_f6i_alloc is the last caller to fib6_info_alloc besides ip6_route_info_create, and there is no reason for it to do its own initialization on a fib6_info. Host routes need to be created even if the device is down, so add a new flag, fc_ignore_dev_down, to fib6_config and update fib6_nh_init to not error out if device is not up. Notes on the conversion: - ip_fib_metrics_init is the same as fib6_config has fc_mx set to NULL and fc_mx_len set to 0 - dst_nocount is handled by the RTF_ADDRCONF flag - dst_host is handled by fc_dst_len = 128 nh_gw does not get set after the conversion to ip6_route_info_create but it should not be set in addrconf_f6i_alloc since this is a host route not a gateway route. Everything else is a straight forward map between fib6_info and fib6_config. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David Ahern 提交于
ip6_route_info_create is a low level function for ensuring fc_metric is set. Move the check and default setting to the 2 locations that do not already set fc_metric before calling ip6_route_info_create. This is required for the next patch which moves addrconf allocations to ip6_route_info_create and want the metric for host routes to be 0. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 21 3月, 2019 1 次提交
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由 Xin Long 提交于
Jianlin reported a crash: [ 381.484332] BUG: unable to handle kernel NULL pointer dereference at 0000000000000068 [ 381.619802] RIP: 0010:fib6_rule_lookup+0xa3/0x160 [ 382.009615] Call Trace: [ 382.020762] <IRQ> [ 382.030174] ip6_route_redirect.isra.52+0xc9/0xf0 [ 382.050984] ip6_redirect+0xb6/0xf0 [ 382.066731] icmpv6_notify+0xca/0x190 [ 382.083185] ndisc_redirect_rcv+0x10f/0x160 [ 382.102569] ndisc_rcv+0xfb/0x100 [ 382.117725] icmpv6_rcv+0x3f2/0x520 [ 382.133637] ip6_input_finish+0xbf/0x460 [ 382.151634] ip6_input+0x3b/0xb0 [ 382.166097] ipv6_rcv+0x378/0x4e0 It was caused by the lookup function __ip6_route_redirect() returns NULL in fib6_rule_lookup() when ip6_create_rt_rcu() returns NULL. So we fix it by simply making ip6_create_rt_rcu() return ip6_null_entry instead of NULL. v1->v2: - move down 'fallback:' to make it more readable. Fixes: e873e4b9 ("ipv6: use fib6_info_hold_safe() when necessary") Reported-by: NJianlin Shi <jishi@redhat.com> Suggested-by: NPaolo Abeni <pabeni@redhat.com> Signed-off-by: NXin Long <lucien.xin@gmail.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Acked-by: NWei Wang <weiwan@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 02 3月, 2019 1 次提交
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由 Hangbin Liu 提交于
For ip rules, we need to use 'ipproto ipv6-icmp' to match ICMPv6 headers. But for ip -6 route, currently we only support tcp, udp and icmp. Add ICMPv6 support so we can match ipv6-icmp rules for route lookup. v2: As David Ahern and Sabrina Dubroca suggested, Add an argument to rtm_getroute_parse_ip_proto() to handle ICMP/ICMPv6 with different family. Reported-by: NJianlin Shi <jishi@redhat.com> Fixes: eacb9384 ("ipv6: support sport, dport and ip_proto in RTM_GETROUTE") Signed-off-by: NHangbin Liu <liuhangbin@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 27 2月, 2019 1 次提交
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由 David Ahern 提交于
IPv6 currently does not support nexthops outside of the AF_INET6 family. Specifically, it does not handle RTA_VIA attribute. If it is passed in a route add request, the actual route added only uses the device which is clearly not what the user intended: $ ip -6 ro add 2001:db8:2::/64 via inet 172.16.1.1 dev eth0 $ ip ro ls ... 2001:db8:2::/64 dev eth0 metric 1024 pref medium Catch this and fail the route add: $ ip -6 ro add 2001:db8:2::/64 via inet 172.16.1.1 dev eth0 Error: IPv6 does not support RTA_VIA attribute. Fixes: 03c05665 ("mpls: Netlink commands to add, remove, and dump routes") Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 23 2月, 2019 2 次提交
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由 Kalash Nainwal 提交于
Set rtm_table to RT_TABLE_COMPAT for ipv6 for tables > 255 to keep legacy software happy. This is similar to what was done for ipv4 in commit 709772e6 ("net: Fix routing tables with id > 255 for legacy software"). Signed-off-by: NKalash Nainwal <kalash@arista.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Paolo Abeni 提交于
When a netdevice is unregistered, we flush the relevant exception via rt6_sync_down_dev() -> fib6_ifdown() -> fib6_del() -> fib6_del_route(). Finally, we end-up calling rt6_remove_exception(), where we release the relevant dst, while we keep the references to the related fib6_info and dev. Such references should be released later when the dst will be destroyed. There are a number of caches that can keep the exception around for an unlimited amount of time - namely dst_cache, possibly even socket cache. As a result device registration may hang, as demonstrated by this script: ip netns add cl ip netns add rt ip netns add srv ip netns exec rt sysctl -w net.ipv6.conf.all.forwarding=1 ip link add name cl_veth type veth peer name cl_rt_veth ip link set dev cl_veth netns cl ip -n cl link set dev cl_veth up ip -n cl addr add dev cl_veth 2001::2/64 ip -n cl route add default via 2001::1 ip -n cl link add tunv6 type ip6tnl mode ip6ip6 local 2001::2 remote 2002::1 hoplimit 64 dev cl_veth ip -n cl link set tunv6 up ip -n cl addr add 2013::2/64 dev tunv6 ip link set dev cl_rt_veth netns rt ip -n rt link set dev cl_rt_veth up ip -n rt addr add dev cl_rt_veth 2001::1/64 ip link add name rt_srv_veth type veth peer name srv_veth ip link set dev srv_veth netns srv ip -n srv link set dev srv_veth up ip -n srv addr add dev srv_veth 2002::1/64 ip -n srv route add default via 2002::2 ip -n srv link add tunv6 type ip6tnl mode ip6ip6 local 2002::1 remote 2001::2 hoplimit 64 dev srv_veth ip -n srv link set tunv6 up ip -n srv addr add 2013::1/64 dev tunv6 ip link set dev rt_srv_veth netns rt ip -n rt link set dev rt_srv_veth up ip -n rt addr add dev rt_srv_veth 2002::2/64 ip netns exec srv netserver & sleep 0.1 ip netns exec cl ping6 -c 4 2013::1 ip netns exec cl netperf -H 2013::1 -t TCP_STREAM -l 3 & sleep 1 ip -n rt link set dev rt_srv_veth mtu 1400 wait %2 ip -n cl link del cl_veth This commit addresses the issue purging all the references held by the exception at time, as we currently do for e.g. ipv6 pcpu dst entries. v1 -> v2: - re-order the code to avoid accessing dst and net after dst_dev_put() Fixes: 93531c67 ("net/ipv6: separate handling of FIB entries from dst based routes") Signed-off-by: NPaolo Abeni <pabeni@redhat.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 22 2月, 2019 2 次提交
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由 Paolo Abeni 提交于
We need a RCU critical section around rt6_info->from deference, and proper annotation. Fixes: 4ed591c8 ("net/ipv6: Allow onlink routes to have a device mismatch if it is the default route") Signed-off-by: NPaolo Abeni <pabeni@redhat.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Paolo Abeni 提交于
We must access rt6_info->from under RCU read lock: move the dereference under such lock, with proper annotation. v1 -> v2: - avoid using multiple, racy, fetch operations for rt->from Fixes: a68886a6 ("net/ipv6: Make from in rt6_info rcu protected") Signed-off-by: NPaolo Abeni <pabeni@redhat.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 16 2月, 2019 1 次提交
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由 Paolo Abeni 提交于
rt6_cache_allowed_for_pmtu() checks for rt->from presence, but it does not access the RCU protected pointer. We can use rcu_access_pointer() and clean-up the code a bit. No functional changes intended. Signed-off-by: NPaolo Abeni <pabeni@redhat.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 20 1月, 2019 1 次提交
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由 Jakub Kicinski 提交于
Make RTM_GETROUTE's doit handler use strict checks when NETLINK_F_STRICT_CHK is set. Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 17 1月, 2019 1 次提交
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由 Jakub Kicinski 提交于
"IPv6: " prefix is already added by pr_fmt, no need to include it again in the pr_warn() format. The message predates extack support, we can replace the whole thing with an extack message. Suggested-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 03 1月, 2019 1 次提交
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由 Stefano Brivio 提交于
In ip6_neigh_lookup(), we must not return errors coming from neigh_create(): if creation of a neighbour entry fails, the lookup should return NULL, in the same way as it's done in __neigh_lookup(). Otherwise, callers legitimately checking for a non-NULL return value of the lookup function might dereference an invalid pointer. For instance, on neighbour table overflow, ndisc_router_discovery() crashes ndisc_update() by passing ERR_PTR(-ENOBUFS) as 'neigh' argument. Reported-by: NJianlin Shi <jishi@redhat.com> Fixes: f8a1b43b ("net/ipv6: Create a neigh_lookup for FIB entries") Signed-off-by: NStefano Brivio <sbrivio@redhat.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 28 12月, 2018 1 次提交
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由 Aditya Pakki 提交于
While flushing the cache via ipv6_sysctl_rtcache_flush(), the call to proc_dointvec() may fail. The fix adds a check that returns the error, on failure. Signed-off-by: NAditya Pakki <pakki001@umn.edu> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 19 11月, 2018 1 次提交
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由 David Ahern 提交于
Preethi reported that PMTU discovery for UDP/raw applications is not working in the presence of VRF when the socket is not bound to a device. The problem is that ip6_sk_update_pmtu does not consider the L3 domain of the skb device if the socket is not bound. Update the function to set oif to the L3 master device if relevant. Fixes: ca254490 ("net: Add VRF support to IPv6 stack") Reported-by: NPreethi Ramachandra <preethir@juniper.net> Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 17 11月, 2018 1 次提交
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由 Xin Long 提交于
These is no need to hold dst before calling rt6_remove_exception_rt(). The call to dst_hold_safe() in ip6_link_failure() was for ip6_del_rt(), which has been removed in Commit 93531c67 ("net/ipv6: separate handling of FIB entries from dst based routes"). Otherwise, it will cause a dst leak. This patch is to simply remove the dst_hold_safe() call before calling rt6_remove_exception_rt() and also do the same in ip6_del_cached_rt(). It's safe, because the removal of the exception that holds its dst's refcnt is protected by rt6_exception_lock. Fixes: 93531c67 ("net/ipv6: separate handling of FIB entries from dst based routes") Fixes: 23fb93a4 ("net/ipv6: Cleanup exception and cache route handling") Reported-by: NLi Shuang <shuali@redhat.com> Signed-off-by: NXin Long <lucien.xin@gmail.com> Reviewed-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 07 11月, 2018 1 次提交
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由 David Ahern 提交于
Add extack argument to ip_fib_metrics_init and add messages for invalid metrics. Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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