CWE
754
Advisory Published
CVE Published
Updated

CVE-2024-42224: net: dsa: mv88e6xxx: Correct check for empty list

First published: Tue Jul 30 2024(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
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
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
6.12.3-1

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