netdev - Re: [PATCH] dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: 
 <176974140986.3149010.13987469540887646258.git-patchwork-notify@kernel.org>
Date: Fri, 30 Jan 2026 02:50:09 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Junrui Luo <moonafterrain@...look.com>
Cc: ioana.ciornei@....com, andrew+netdev@...n.ch, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org, danisjiang@...il.com
Subject: Re: [PATCH] dpaa2-switch: prevent ZERO_SIZE_PTR dereference when
 num_ifs is zero

Hello:

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

On Wed, 28 Jan 2026 16:07:34 +0800 you wrote:
> The driver allocates arrays for ports, FDBs, and filter blocks using
> kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the
> device reports zero interfaces (either due to hardware configuration
> or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10)
> instead of NULL.
> 
> Later in dpaa2_switch_probe(), the NAPI initialization unconditionally
> accesses ethsw->ports[0]->netdev, which attempts to dereference
> ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic.
> 
> [...]

Here is the summary with links:
  - dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero
    https://git.kernel.org/netdev/net/c/ed48a84a72fe

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html