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| author | William Tu <u9012063@gmail.com> | 2020-05-12 10:36:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 12:50:17 +0200 |
| commit | 584661cc24d740bc0d68b605e7089d80a99bba9d (patch) | |
| tree | 0c67f78a78fdeafc39b81898e4edcb548fbd203c | |
| parent | cc065e1b11a270ebd2b18bbe61f0d6cc8efaa15d (diff) | |
| download | linux-stable-584661cc24d740bc0d68b605e7089d80a99bba9d.tar.gz linux-stable-584661cc24d740bc0d68b605e7089d80a99bba9d.tar.bz2 linux-stable-584661cc24d740bc0d68b605e7089d80a99bba9d.zip | |
erspan: Check IFLA_GRE_ERSPAN_VER is set.
commit 51fa960d3b5163b1af22efdebcabfccc5d615ad6 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 6d4b6815aa34..086474b09db0 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1182,7 +1182,8 @@ 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 */ |