netdev - Re: [PATCH v2] bridge: Fix possible races between assigning rx_handler_data and setting IFF_BRIDGE

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Date:   Thu, 29 Apr 2021 22:40:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     zhangzhengming <zhangzhengming@...wei.com>
Cc:     roopa@...dia.com, nikolay@...dia.com, davem@...emloft.net,
        kuba@...nel.org, bridge@...ts.linux-foundation.org,
        netdev@...r.kernel.org, wangxiaogang3@...wei.com,
        xuhanbing@...wei.com
Subject: Re: [PATCH v2] bridge: Fix possible races between assigning
 rx_handler_data and setting IFF_BRIDGE_PORT bit

Hello:

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

On Wed, 28 Apr 2021 22:38:14 +0800 you wrote:
> From: Zhang Zhengming <zhangzhengming@...wei.com>
> 
> There is a crash in the function br_get_link_af_size_filtered,
> as the port_exists(dev) is true and the rx_handler_data of dev is NULL.
> But the rx_handler_data of dev is correct saved in vmcore.
> 
> The oops looks something like:
>  ...
>  pc : br_get_link_af_size_filtered+0x28/0x1c8 [bridge]
>  ...
>  Call trace:
>   br_get_link_af_size_filtered+0x28/0x1c8 [bridge]
>   if_nlmsg_size+0x180/0x1b0
>   rtnl_calcit.isra.12+0xf8/0x148
>   rtnetlink_rcv_msg+0x334/0x370
>   netlink_rcv_skb+0x64/0x130
>   rtnetlink_rcv+0x28/0x38
>   netlink_unicast+0x1f0/0x250
>   netlink_sendmsg+0x310/0x378
>   sock_sendmsg+0x4c/0x70
>   __sys_sendto+0x120/0x150
>   __arm64_sys_sendto+0x30/0x40
>   el0_svc_common+0x78/0x130
>   el0_svc_handler+0x38/0x78
>   el0_svc+0x8/0xc
> 
> [...]

Here is the summary with links:
  - [v2] bridge: Fix possible races between assigning rx_handler_data and setting IFF_BRIDGE_PORT bit
    https://git.kernel.org/netdev/net/c/59259ff7a81b

You are awesome, thank you!
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