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| author |   William Tu <u9012063@gmail.com> | 2020-05-12 10:36:23 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-05-12 13:11:41 -0700 |
| commit | 51fa960d3b5163b1af22efdebcabfccc5d615ad6 (patch) | |
| tree | aad286134e49b89acbfb032c3acb6af575dc1b03 /net/ipv4/ip_gre.c | |
| parent | Merge branch 'Traffic-support-for-dsa_8021q-in-vlan_filtering-1-mode' (diff) | |
| download | wireguard-linux-51fa960d3b5163b1af22efdebcabfccc5d615ad6.tar.xz wireguard-linux-51fa960d3b5163b1af22efdebcabfccc5d615ad6.zip | |
erspan: Check IFLA_GRE_ERSPAN_VER is set.
Add a check to make sure the IFLA_GRE_ERSPAN_VER is provided by users.
Fixes: f989d546a2d5 ("erspan: Add type I version 0 support.")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: William Tu <u9012063@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index e29cd48674d7..0ce9b91ff55c 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1087,7 +1087,8 @@ static int erspan_validate(struct nlattr *tb[], struct nlattr *data[], if (ret) return ret; - if (nla_get_u8(data[IFLA_GRE_ERSPAN_VER]) == 0) + if (data[IFLA_GRE_ERSPAN_VER] && + nla_get_u8(data[IFLA_GRE_ERSPAN_VER]) == 0) return 0; /* ERSPAN type II/III should only have GRE sequence and key flag */ |