Description
In the Linux kernel, the following vulnerability has been resolved: net: phy: don't try to setup PHY-driven SFP cages when using genphy We don't have support for PHY-driver SFP cages with the genphy code. On top of that, it was found by sashiko that running sfp_bus_add_upstream() for genphy deadlocks, as for genphy the PHY probing runs under RTNL, which isn't the case for non-genphy drivers. This problem was reproduced, and does lead to a deadlock on RTNL. Before the blamed commit, the phy_sfp_probe() call was made by individual PHY drivers, so there was no way to get to the SFP probing path when using genphy. Let's therefore only run phy_sfp_probe when not using genphy.
Affected products
- Linux / Linuxbad869b5e41a08424ff130fd6bb41b854be70095 – ef8d739eee6f85303cbecebc01eb72f063de74e0
- Linux / Linuxbad869b5e41a08424ff130fd6bb41b854be70095 – 5a0082ec20a05ef2378410323a5089a8f1786f4a
- Linux / Linux7.0 – 7.0
- Linux / Linux0 – 7.0
- Linux / Linux7.0.13 – 7.0.*
- Linux / Linux7.1 – *