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| author | Miao Wang <shankerwangmiao@gmail.com> | 2021-06-22 12:24:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-14 16:56:25 +0200 |
| commit | 6610d5a73b6f9a30a7398f88a9bf09105476f83d (patch) | |
| tree | c224b4fc7840f76e483634a692df15b5f811f21a /net | |
| parent | c3fcfc4e369be3901f1bbf8e3bf2d9e426bf097b (diff) | |
| download | linux-6610d5a73b6f9a30a7398f88a9bf09105476f83d.tar.gz linux-6610d5a73b6f9a30a7398f88a9bf09105476f83d.tar.bz2 linux-6610d5a73b6f9a30a7398f88a9bf09105476f83d.zip | |
net/ipv4: swap flow ports when validating source
[ Upstream commit c69f114d09891adfa3e301a35d9e872b8b7b5a50 ]
When doing source address validation, the flowi4 struct used for
fib_lookup should be in the reverse direction to the given skb.
fl4_dport and fl4_sport returned by fib4_rules_early_flow_dissect
should thus be swapped.
Fixes: 5a847a6e1477 ("net/ipv4: Initialize proto and ports in flow struct")
Signed-off-by: Miao Wang <shankerwangmiao@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_frontend.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 84bb707bd88d..647bceab56c2 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -371,6 +371,8 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, fl4.flowi4_proto = 0; fl4.fl4_sport = 0; fl4.fl4_dport = 0; + } else { + swap(fl4.fl4_sport, fl4.fl4_dport); } if (fib_lookup(net, &fl4, &res, 0)) |