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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2022-04-08 17:03:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 10:23:28 +0300 |
| commit | a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e (patch) | |
| tree | 74a299547bc062e733b6e7d26015fbbbdb9f3dd8 /net/ipv6 | |
| parent | 659214603bf26d2699039099cad1bea5b13bcae0 (diff) | |
| download | linux-a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e.tar.xz | |
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/ipv6')
| -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 2aa39ce7093d..05e19e5d6514 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -508,7 +508,7 @@ 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; |