In the Linux kernel, the following vulnerability has been resolved:

net: bcmgenet: keep RBUF EEE/PM disabled

Setting RBUF_EEE_EN | RBUF_PM_EN in RBUF_ENERGY_CTRL breaks the RX
path on GENET hardware once MAC EEE becomes active. RX traffic stops
flowing while the link stays up and the usual descriptor/RX error
counters remain quiet. In that state the MAC still accepts frames
(rbuf_ovflow_cnt keeps climbing) but RBUF no longer forwards them to
DMA, so rx_packets is no longer incremented at the netdev level. On
some boards the corruption ends up as a paging fault in
skb_release_data via bcmgenet_rx_poll on an LPI exit.

Reproduced on Pi 4B (BCM2711 + BCM54213PE) and confirmed by Florian
Fainelli on an internal Broadcom 4908-family board with the same crash
signature. RBUF_PM_EN is not publicly documented.

This shows up more often now that phy_support_eee() enables EEE by
default, but it also affects older kernels as soon as TX LPI is
turned on via ethtool, so it is not specific to recent changes.

Always clear RBUF_EEE_EN | RBUF_PM_EN in bcmgenet_eee_enable_set so
the bits stay off across resets. UMAC and TBUF setup is left alone so
TX-side EEE keeps working.

https://git.kernel.org/stable/c/2040eb83f6ada148fb32dd98b943a498005d79f2

https://git.kernel.org/stable/c/289499907399c5a9f2ed82cb34df49112bb8488f

https://git.kernel.org/stable/c/3d4ef05266ab16d8ef7dd21658a557801eb78704

https://git.kernel.org/stable/c/49bdf6bbb21b9c6e3f4d0c1910bf0ef98424be95

https://git.kernel.org/stable/c/9a1730245e416d11ad5c0f2c100061d61cc43f60

https://git.kernel.org/stable/c/a212fc08f5c48a16a94092bf0a9a8b7cf4483b11

https://git.kernel.org/stable/c/b579f3a73da7a7e74213558f4cc3d865c30aaa78

https://git.kernel.org/stable/c/f2782ddac82c70df313012da5f71f1f06b5553ca

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