linux-kernel - Re: [PATCH net v2] net/smc: Transitional solution for clcsock race issue

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Date:   Mon, 24 Jan 2022 12:10:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Wen Gu <guwen@...ux.alibaba.com>
Cc:     kgraul@...ux.ibm.com, davem@...emloft.net, kuba@...nel.org,
        linux-s390@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] net/smc: Transitional solution for clcsock race issue

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Sat, 22 Jan 2022 17:43:09 +0800 you wrote:
> We encountered a crash in smc_setsockopt() and it is caused by
> accessing smc->clcsock after clcsock was released.
> 
>  BUG: kernel NULL pointer dereference, address: 0000000000000020
>  #PF: supervisor read access in kernel mode
>  #PF: error_code(0x0000) - not-present page
>  PGD 0 P4D 0
>  Oops: 0000 [#1] PREEMPT SMP PTI
>  CPU: 1 PID: 50309 Comm: nginx Kdump: loaded Tainted: G E     5.16.0-rc4+ #53
>  RIP: 0010:smc_setsockopt+0x59/0x280 [smc]
>  Call Trace:
>   <TASK>
>   __sys_setsockopt+0xfc/0x190
>   __x64_sys_setsockopt+0x20/0x30
>   do_syscall_64+0x34/0x90
>   entry_SYSCALL_64_after_hwframe+0x44/0xae
>  RIP: 0033:0x7f16ba83918e
>   </TASK>
> 
> [...]

Here is the summary with links:
  - [net,v2] net/smc: Transitional solution for clcsock race issue
    https://git.kernel.org/netdev/net/c/c0bf3d8a943b

You are awesome, thank you!
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