CVE-2022-50771

A lockdep warning was found in the Linux kernel's RCU subsystem. The rcu_force_quiescent_state() function incorrectly uses __this_cpu_read() in preemptible code context. This macro requires preemption to be disabled, but the code can be called from preemptible context during rcutorture testing, triggering a lockdep warning.

This is a lockdep/debugging warning that occurs when running rcutorture with specific parameters on preemptible kernels. The warning indicates improper use of per-CPU access macros but does not cause a crash or security vulnerability in normal operation. The fix simply changes to the appropriate raw_cpu_read() macro.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.