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| author | David Ahern <dsahern@gmail.com> | 2019-07-18 01:08:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-28 09:28:25 +0300 |
| commit | f2acb2903f1603643a7b683c04bd88a7781888dd (patch) | |
| tree | 94e8533467a5b1cb18979665e41710db9a871f53 | |
| parent | 7719f7253677b5a9a3db8b95d2861d32081cfca0 (diff) | |
| download | linux-f2acb2903f1603643a7b683c04bd88a7781888dd.tar.xz | |
ipv6: rt6_check should return NULL if 'from' is NULL
[ Upstream commit 49d05fe2c9d1b4a27761c9807fec39b8155bef9e ]
Paul reported that l2tp sessions were broken after the commit referenced
in the Fixes tag. Prior to this commit rt6_check returned NULL if the
rt6_info 'from' was NULL - ie., the dst_entry was disconnected from a FIB
entry. Restore that behavior.
Fixes: 93531c674315 ("net/ipv6: separate handling of FIB entries from dst based routes")
Reported-by: Paul Donohue <linux-kernel@PaulSD.com>
Tested-by: Paul Donohue <linux-kernel@PaulSD.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index ab348489bd8a..9fc2d803c684 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2183,7 +2183,7 @@ static struct dst_entry *rt6_check(struct rt6_info *rt, { u32 rt_cookie = 0; - if ((from && !fib6_get_cookie_safe(from, &rt_cookie)) || + if (!from || !fib6_get_cookie_safe(from, &rt_cookie) || rt_cookie != cookie) return NULL; |