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SubjectRe: [PATCH net] ethtool: fix reference leak in some *_SET handlers
On Sun, 22 Mar 2020 21:15:51 +0100 (CET) Michal Kubecek wrote:
> Andrew noticed that some handlers for *_SET commands leak a netdev
> reference if required ethtool_ops callbacks do not exist. A simple
> reproducer would be e.g.
>
> ip link add veth1 type veth peer name veth2
> ethtool -s veth1 wol g
> ip link del veth1
>
> Make sure dev_put() is called when ethtool_ops check fails.

Fixes: e54d04e3afea ("ethtool: set message mask with DEBUG_SET request")
Fixes: a53f3d41e4d3 ("ethtool: set link settings with LINKINFO_SET request")
Fixes: bfbcfe2032e7 ("ethtool: set link modes related data with LINKMODES_SET request")
Fixes: 8d425b19b305 ("ethtool: set wake-on-lan settings with WOL_SET request")

> Reported-by: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Michal Kubecek <mkubecek@suse.cz>

Reviewed-by: Jakub Kicinski <kuba@kernel.org>

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