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authorDavid Ahern <dsahern@gmail.com>2020-09-13 12:43:39 -0600
committerDavid S. Miller <davem@davemloft.net>2020-09-14 14:54:56 -0700
commit1869e226a7b3ef75b4f70ede2f1b7229f7157fa4 (patch)
treeed7271a67ee76860e82aa3fbd27b2d9f42c480c2 /net
parent9d6e0c8b707b1f29f3d4e03714a72fffb417d144 (diff)
ipv4: Initialize flowi4_multipath_hash in data path
flowi4_multipath_hash was added by the commit referenced below for tunnels. Unfortunately, the patch did not initialize the new field for several fast path lookups that do not initialize the entire flow struct to 0. Fix those locations. Currently, flowi4_multipath_hash is random garbage and affects the hash value computed by fib_multipath_hash for multipath selection. Fixes: 24ba14406c5c ("route: Add multipath_hash in flowi_common to make user-define hash") Signed-off-by: David Ahern <dsahern@gmail.com> Cc: wenxu <wenxu@ucloud.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/filter.c1
-rw-r--r--net/ipv4/fib_frontend.c1
-rw-r--r--net/ipv4/route.c1
3 files changed, 3 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c
index 1f647ab986b6..1b168371ba96 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4838,6 +4838,7 @@ static int bpf_ipv4_fib_lookup(struct net *net, struct bpf_fib_lookup *params,
fl4.saddr = params->ipv4_src;
fl4.fl4_sport = params->sport;
fl4.fl4_dport = params->dport;
+ fl4.flowi4_multipath_hash = 0;
if (flags & BPF_FIB_LOOKUP_DIRECT) {
u32 tbid = l3mdev_fib_table_rcu(dev) ? : RT_TABLE_MAIN;
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 41079490a118..86a23e4a6a50 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -362,6 +362,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
fl4.flowi4_tun_key.tun_id = 0;
fl4.flowi4_flags = 0;
fl4.flowi4_uid = sock_net_uid(net, NULL);
+ fl4.flowi4_multipath_hash = 0;
no_addr = idev->ifa_list == NULL;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 8ca6bcab7b03..e5f210d00851 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2147,6 +2147,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
fl4.daddr = daddr;
fl4.saddr = saddr;
fl4.flowi4_uid = sock_net_uid(net, NULL);
+ fl4.flowi4_multipath_hash = 0;
if (fib4_rules_early_flow_dissect(net, skb, &fl4, &_flkeys)) {
flkeys = &_flkeys;