linux-kernel - Re: [PATCH v3] nfp: fix use-after-free in area_cache

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Message-Id: <166023421525.9507.12428200165169561355.git-patchwork-notify@kernel.org>
Date:   Thu, 11 Aug 2022 16:10:15 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jialiang Wang <wangjialiang0806@....com>
Cc:     simon.horman@...igine.com, kuba@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, niejianglei2021@....com,
        oss-drivers@...igine.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] nfp: fix use-after-free in area_cache_get()

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Wed, 10 Aug 2022 15:30:57 +0800 you wrote:
> area_cache_get() is used to distribute cache->area and set cache->id,
>  and if cache->id is not 0 and cache->area->kref refcount is 0, it will
>  release the cache->area by nfp_cpp_area_release(). area_cache_get()
>  set cache->id before cpp->op->area_init() and nfp_cpp_area_acquire().
> 
> But if area_init() or nfp_cpp_area_acquire() fails, the cache->id is
>  is already set but the refcount is not increased as expected. At this
>  time, calling the nfp_cpp_area_release() will cause use-after-free.
> 
> [...]

Here is the summary with links:
  - [v3] nfp: fix use-after-free in area_cache_get()
    https://git.kernel.org/netdev/net/c/02e1a114fdb7

You are awesome, thank you!
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