From: Simon Horman <horms@kernel.org>
To: Eric Dumazet <edumazet@google.com>
Cc: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
David Ahern <dsahern@kernel.org>,
netdev@vger.kernel.org, eric.dumazet@gmail.com,
syzbot <syzkaller@googlegroups.com>
Subject: Re: [PATCH net] ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
Date: Fri, 26 Jan 2024 21:25:11 +0000 [thread overview]
Message-ID: <20240126212511.GG401354@kernel.org> (raw)
In-Reply-To: <20240125170557.2663942-1-edumazet@google.com>
On Thu, Jan 25, 2024 at 05:05:57PM +0000, Eric Dumazet wrote:
> syzbot found __ip6_tnl_rcv() could access unitiliazed data [1].
>
> Call pskb_inet_may_pull() to fix this, and initialize ipv6h
> variable after this call as it can change skb->head.
...
> Fixes: 0d3c703a9d17 ("ipv6: Cleanup IPv6 tunnel receive path")
> Reported-by: syzbot <syzkaller@googlegroups.com>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
next prev parent reply other threads:[~2024-01-26 21:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-25 17:05 [PATCH net] ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv() Eric Dumazet
2024-01-26 21:25 ` Simon Horman [this message]
2024-01-26 22:20 ` patchwork-bot+netdevbpf
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