linux-kernel - Re: [PATCH net v2] net: tun: fix bugs for oversize packet when napi frags enabled

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Message-Id: <166727281607.6120.17368468270995736765.git-patchwork-notify@kernel.org>
Date:   Tue, 01 Nov 2022 03:20:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Ziyang Xuan (William) <william.xuanziyang@...wei.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, peterpenkov96@...il.com,
        maheshb@...gle.com, ast@...nel.org, daniel@...earbox.net,
        hawk@...nel.org, john.fastabend@...il.com
Subject: Re: [PATCH net v2] net: tun: fix bugs for oversize packet when napi frags
 enabled

Hello:

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

On Sat, 29 Oct 2022 17:41:01 +0800 you wrote:
> Recently, we got two syzkaller problems because of oversize packet
> when napi frags enabled.
> 
> One of the problems is because the first seg size of the iov_iter
> from user space is very big, it is 2147479538 which is bigger than
> the threshold value for bail out early in __alloc_pages(). And
> skb->pfmemalloc is true, __kmalloc_reserve() would use pfmemalloc
> reserves without __GFP_NOWARN flag. Thus we got a warning as following:
> 
> [...]

Here is the summary with links:
  - [net,v2] net: tun: fix bugs for oversize packet when napi frags enabled
    https://git.kernel.org/netdev/net/c/363a5328f4b0

You are awesome, thank you!
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