Maxime Chevallier
1ad84a151a
net: ethtool: phy: Don't set the context dev pointer for unfiltered DUMP
...
The context info allows continuing DUMP requests, shall they fill the
netlink buffer.
In the case of filtered DUMP requests, a reference on the netdev is
grabbed in the .start() callback and release in .done().
Unfiltered DUMP request don't need the dev pointer to be set in the context
info, doing so will trigger an unwanted netdev_put() in .done().
Reported-by: syzbot+e9ed4e4368d450c8f9db@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/000000000000d3bf150621d361a7@google.com/
Fixes: 17194be4c8https://patch.msgid.link/20240913100515.167341-1-maxime.chevallier@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-13 21:40:12 -07:00
Maxime Chevallier
fce1e9f86a
net: ethtool: phy: Check the req_info.pdn field for GET commands
...
When processing the netlink GET requests to get PHY info, the req_info.pdn
pointer is NULL when no PHY matches the requested parameters, such as when
the phy_index is invalid, or there's simply no PHY attached to the
interface.
Therefore, check the req_info.pdn pointer for NULL instead of
dereferencing it.
Suggested-by: Eric Dumazet <edumazet@google.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Closes: https://lore.kernel.org/netdev/CANn89iKRW0WpGAh1tKqY345D8WkYCPm3Y9ym--Si42JZrQAu1g@mail.gmail.com/T/#mfced87d607d18ea32b3b4934dfa18d7b36669285
Fixes: 17194be4c8https://patch.msgid.link/20240910174636.857352-1-maxime.chevallier@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-11 16:38:10 -07:00
Maxime Chevallier
17194be4c8
net: ethtool: Introduce a command to list PHYs on an interface
...
As we have the ability to track the PHYs connected to a net_device
through the link_topology, we can expose this list to userspace. This
allows userspace to use these identifiers for phy-specific commands and
take the decision of which PHY to target by knowing the link topology.
Add PHY_GET and PHY_DUMP, which can be a filtered DUMP operation to list
devices on only one interface.
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-08-23 13:04:34 +01:00
