CVE-2024-42224

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: Correct check for empty list Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") mv88e6xxx_default_mdio_bus() has checked that the return value of list_first_entry() is non-NULL. This appears to be intended to guard against the list chip->mdios being empty. However, it is not the correct check as the implementation of list_first_entry is not designed to return NULL for empty lists. Instead, use list_first_entry_or_null() which does return NULL if the list is empty. Flagged by Smatch. Compile tested only.

• linux linux kernel (>= 4.11 < 4.19.318) • linux linux kernel (>= 4.20 < 5.4.280) • linux linux kernel (>= 5.5 < 5.10.222) • linux linux kernel (>= 5.11 < 5.15.163) • linux linux kernel (>= 5.16 < 6.1.98) • linux linux kernel (>= 6.2 < 6.6.39) • linux linux kernel (>= 6.7 < 6.9.9)