CVE-2025-22060

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

net: mvpp2: Prevent parser TCAM memory corruption

Protect the parser TCAM/SRAM memory, and the cached (shadow) SRAM

information, from concurrent modifications.

Both the TCAM and SRAM tables are indirectly accessed by configuring

an index register that selects the row to read or write to. This means

that operations must be atomic in order to, e.g., avoid spreading

writes across multiple rows. Since the shadow SRAM array is used to

find free rows in the hardware table, it must also be protected in

order to avoid TOCTOU errors where multiple cores allocate the same

row.

This issue was detected in a situation where `mvpp2_set_rx_mode()` ran

concurrently on two CPUs. In this particular case the

MVPP2_PE_MAC_UC_PROMISCUOUS entry was corrupted, causing the

classifier unit to drop all incoming unicast - indicated by the

`rx_classifier_drops` counter.