Re: [PATCH net-next v2] net: dsa: mv88e6xxx: Avoid uninitialized value on MDIO read error

[Paolo Abeni]

On 8/15/26 5:17 PM, Ruoyu Wang wrote:
> mv88e6xxx_mdio_read() applies the internal PHY model-number workaround
> before returning a Clause 22 read error. Since the PHY read may leave
> val untouched on failure, the workaround can consume an uninitialized
> value.
> 
> Return the PHY read error immediately after dropping the register lock.
> Successful reads continue through the workaround and return val as
> before.
> 
> This issue was found by a static analysis checker and confirmed by
> manual source review.
> 
> Assisted-by: unnamed:deepseek-v4-pro typestate
> Signed-off-by: Ruoyu Wang <ruoyuw560@xxxxxxxxx>
## Form letter - net-next-closed

We have already submitted our pull request with net-next material for v7.3,
and therefore net-next is closed for new drivers, features, code refactoring
and optimizations. We are currently accepting bug fixes only.

Please repost when net-next reopens after Aug 31st.

RFC patches sent for review only are obviously welcome at any time.

See: https://www.kernel.org/doc/html/next/process/maintainer-netdev.html#development-cycle