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ipv6: fix NULL deref in ip6_rcv_core()

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idev can be NULL, as the surrounding code suggests.

Fixes: 4daf841a2e ("net: ipv6: add skb drop reasons to ip6_rcv_core()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Menglong Dong <imagedong@tencent.com>
Cc: Jiang Biao <benbjiang@tencent.com>
Cc: Hao Peng <flyingpeng@tencent.com>
Link: https://lore.kernel.org/r/20220413205653.1178458-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2022-04-13 13:56:53 -07:00 committed by Jakub Kicinski
parent c9a40d1c87
commit 0339d25a28
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/ip6_input.c
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@ -166,7 +166,7 @@ static struct sk_buff *ip6_rcv_core(struct sk_buff *skb, struct net_device *dev,
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL ||
!idev || unlikely(idev->cnf.disable_ipv6)) {
__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS);
if (unlikely(idev->cnf.disable_ipv6))
if (idev && unlikely(idev->cnf.disable_ipv6))
SKB_DR_SET(reason, IPV6DISABLED);
goto drop;
}