netdev - Re: [PATCH net v4] net: nfc: nci: Add parameter validation for packet data

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Message-Id: 
 <175922100601.1892773.12754446584125259059.git-patchwork-notify@kernel.org>
Date: Tue, 30 Sep 2025 08:30:06 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Deepak Sharma <deepak.sharma.472935@...il.com>
Cc: krzk@...nel.org, vadim.fedorenko@...ux.dev, linville@...driver.com,
 kuba@...nel.org, edumazet@...gle.com, juraj@...inay.com, pabeni@...hat.com,
 horms@...nel.org, netdev@...r.kernel.org, stable@...r.kernel.org,
 linux-kernel-mentees@...ts.linux.dev, david.hunter.linux@...il.com,
 skhan@...uxfoundation.org,
 syzbot+740e04c2a93467a0f8c8@...kaller.appspotmail.com
Subject: Re: [PATCH net v4] net: nfc: nci: Add parameter validation for packet
 data

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Thu, 25 Sep 2025 18:58:46 +0530 you wrote:
> Syzbot reported an uninitialized value bug in nci_init_req, which was
> introduced by commit 5aca7966d2a7 ("Merge tag
> 'perf-tools-fixes-for-v6.17-2025-09-16' of
> git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools").
> 
> This bug arises due to very limited and poor input validation
> that was done at nic_valid_size(). This validation only
> validates the skb->len (directly reflects size provided at the
> userspace interface) with the length provided in the buffer
> itself (interpreted as NCI_HEADER). This leads to the processing
> of memory content at the address assuming the correct layout
> per what opcode requires there. This leads to the accesses to
> buffer of `skb_buff->data` which is not assigned anything yet.
> 
> [...]

Here is the summary with links:
  - [net,v4] net: nfc: nci: Add parameter validation for packet data
    https://git.kernel.org/netdev/net/c/9c328f54741b

You are awesome, thank you!
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