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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2022-04-08 16:03:42 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 09:34:19 +0200 |
| commit | adee01bbf6cb5b3e4ed08be8ff866aac90f13836 (patch) | |
| tree | 217bef177bdb1c26d7e2c01512b1ab115c571fa2 /net | |
| parent | cab64cb82fe1a2436bb7991cb628d76de3c44751 (diff) | |
| download | linux-stable-adee01bbf6cb5b3e4ed08be8ff866aac90f13836.tar.gz linux-stable-adee01bbf6cb5b3e4ed08be8ff866aac90f13836.tar.bz2 linux-stable-adee01bbf6cb5b3e4ed08be8ff866aac90f13836.zip | |
ipv6: fix panic when forwarding a pkt with no in6 dev
commit e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0 upstream.
kongweibin reported a kernel panic in ip6_forward() when input interface
has no in6 dev associated.
The following tc commands were used to reproduce this panic:
tc qdisc del dev vxlan100 root
tc qdisc add dev vxlan100 root netem corrupt 5%
CC: stable@vger.kernel.org
Fixes: ccd27f05ae7b ("ipv6: fix 'disable_policy' for fwd packets")
Reported-by: kongweibin <kongweibin2@huawei.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/ip6_output.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 8aaf9cf3d74a..04c3cb4c5fec 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -485,7 +485,7 @@ int ip6_forward(struct sk_buff *skb) goto drop; if (!net->ipv6.devconf_all->disable_policy && - !idev->cnf.disable_policy && + (!idev || !idev->cnf.disable_policy) && !xfrm6_policy_check(NULL, XFRM_POLICY_FWD, skb)) { __IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS); goto drop; |