netdev - Re: [PATCH net] sctp: break out if skb_header_pointer returns NULL in sctp_rcv

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Message-Id: <163247640714.26581.17261316258079212151.git-patchwork-notify@kernel.org>
Date:   Fri, 24 Sep 2021 09:40:07 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Xin Long <lucien.xin@...il.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        linux-sctp@...r.kernel.org, marcelo.leitner@...il.com
Subject: Re: [PATCH net] sctp: break out if skb_header_pointer returns NULL in
 sctp_rcv_ootb

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Thu, 23 Sep 2021 00:05:04 -0400 you wrote:
> We should always check if skb_header_pointer's return is NULL before
> using it, otherwise it may cause null-ptr-deref, as syzbot reported:
> 
>   KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
>   RIP: 0010:sctp_rcv_ootb net/sctp/input.c:705 [inline]
>   RIP: 0010:sctp_rcv+0x1d84/0x3220 net/sctp/input.c:196
>   Call Trace:
>   <IRQ>
>    sctp6_rcv+0x38/0x60 net/sctp/ipv6.c:1109
>    ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422
>    ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
>    NF_HOOK include/linux/netfilter.h:307 [inline]
>    NF_HOOK include/linux/netfilter.h:301 [inline]
>    ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
>    dst_input include/net/dst.h:460 [inline]
>    ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
>    NF_HOOK include/linux/netfilter.h:307 [inline]
>    NF_HOOK include/linux/netfilter.h:301 [inline]
>    ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297
> 
> [...]

Here is the summary with links:
  - [net] sctp: break out if skb_header_pointer returns NULL in sctp_rcv_ootb
    https://git.kernel.org/netdev/net/c/f7e745f8e944

You are awesome, thank you!
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