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authorNicolas Dichtel <nicolas.dichtel@6wind.com>2022-04-08 17:03:42 +0300
committerDavid S. Miller <davem@davemloft.net>2022-04-11 14:28:43 +0300
commite3fa461d8b0e185b7da8a101fe94dfe6dd500ac0 (patch)
tree13667a931f60d0a36453102b789126c46f58a183
parent1a7eb80d170c28be2928433702256fe2a0bd1e0f (diff)
downloadlinux-e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0.tar.xz
ipv6: fix panic when forwarding a pkt with no in6 dev
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>
-rw-r--r--net/ipv6/ip6_output.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e23f058166af..fa63ef2bd99c 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;