From: sashiko-bot@kernel.org
To: "Prashant Sengar" <prashantsengar25031@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH net] net: usb: lan78xx: avoid NULL PHY dereference in WoL setup
Date: Sun, 18 Oct 2026 15:24:23 +0000 [thread overview]
Message-ID: <sashiko-outbox-176234@kernel.org> (raw)
In-Reply-To: <20261018151830.643511-1-prashantsengar25031@gmail.com>
> LAN7801 supports fixed-link configurations without an attached PHY.
> However, lan78xx_set_wol() unconditionally passes netdev->phydev
> to phy_ethtool_set_wol(), which dereferences the missing PHY.
>
> Only call the PHY Wake-on-LAN helper when a PHY is attached.
>
> The issue was reproduced with USB Raw Gadget and dummy_hcd in QEMU.
> The unmodified driver triggered a NULL pointer dereference.
> With this change, the same ioctl completes successfully.
>
> Fixes: e110bc825897 ("net: usb: lan78xx: Convert to PHYLINK for improved PHY and MAC management")
>
> Signed-off-by: Prashant Sengar <prashantsengar25031@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261018151830.643511-1-prashantsengar25031@gmail.com?part=1
next prev parent reply other threads:[~2026-10-18 15:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-18 15:18 [PATCH net] net: usb: lan78xx: avoid NULL PHY dereference in WoL setup Prashant Sengar
2026-10-18 15:24 ` sashiko-bot [this message]
2026-10-18 16:21 ` Andrew Lunn
2026-10-19 15:20 ` netdev-bot+sashiko
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